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-rw-r--r--ops/besadii/default.nix8
-rw-r--r--ops/besadii/main.go558
-rw-r--r--ops/deploy-whitby/default.nix31
-rwxr-xr-xops/deploy-whitby/deploy-whitby.sh46
-rw-r--r--ops/dns/README.md11
-rw-r--r--ops/dns/default.nix14
-rw-r--r--ops/dns/nixery.dev.zone10
-rw-r--r--ops/dns/tvl.fyi.zone39
-rw-r--r--ops/dns/tvl.su.zone51
-rw-r--r--ops/gerrit-tvl/HttpModule.java14
-rw-r--r--ops/gerrit-tvl/MANIFEST.MF2
-rw-r--r--ops/gerrit-tvl/README.md6
-rw-r--r--ops/gerrit-tvl/default.nix33
-rw-r--r--ops/gerrit-tvl/static/tvl.js189
-rw-r--r--ops/glesys/.gitignore3
-rw-r--r--ops/glesys/README.md20
-rw-r--r--ops/glesys/default.nix8
-rw-r--r--ops/glesys/dns-nixery-dev.tf44
-rw-r--r--ops/glesys/dns-tvl-fyi.tf99
-rw-r--r--ops/glesys/dns-tvl-su.tf122
-rw-r--r--ops/glesys/main.tf72
-rw-r--r--ops/journaldriver/.gitignore3
-rw-r--r--ops/journaldriver/Cargo.lock511
-rw-r--r--ops/journaldriver/Cargo.toml22
-rw-r--r--ops/journaldriver/README.md152
-rw-r--r--ops/journaldriver/build.rs5
-rw-r--r--ops/journaldriver/default.nix11
-rw-r--r--ops/journaldriver/src/main.rs638
-rw-r--r--ops/journaldriver/src/tests.rs131
-rw-r--r--ops/keycloak/.gitignore3
-rw-r--r--ops/keycloak/README.md18
-rw-r--r--ops/keycloak/clients.tf106
-rw-r--r--ops/keycloak/default.nix8
-rw-r--r--ops/keycloak/main.tf34
-rw-r--r--ops/keycloak/user_sources.tf21
-rw-r--r--ops/kontemplate/.gitignore2
-rw-r--r--ops/kontemplate/LICENSE674
-rw-r--r--ops/kontemplate/README.md185
-rwxr-xr-xops/kontemplate/build-release.sh75
-rw-r--r--ops/kontemplate/context/context.go266
-rw-r--r--ops/kontemplate/context/context_test.go353
-rw-r--r--ops/kontemplate/context/testdata/collections-test.yaml15
-rw-r--r--ops/kontemplate/context/testdata/default-loading.yaml6
-rw-r--r--ops/kontemplate/context/testdata/default/default.yaml2
-rw-r--r--ops/kontemplate/context/testdata/explicit-path.yaml11
-rw-r--r--ops/kontemplate/context/testdata/explicit-subresource-path.yaml8
-rw-r--r--ops/kontemplate/context/testdata/flat-test.yaml10
-rw-r--r--ops/kontemplate/context/testdata/flat-with-args-test.yaml9
-rw-r--r--ops/kontemplate/context/testdata/import-vars-simple.yaml5
-rw-r--r--ops/kontemplate/context/testdata/merging/context.yaml15
-rw-r--r--ops/kontemplate/context/testdata/merging/import-vars.yaml4
-rw-r--r--ops/kontemplate/context/testdata/merging/resource/default.yaml5
-rw-r--r--ops/kontemplate/context/testdata/merging/resource/output.yaml5
-rw-r--r--ops/kontemplate/context/testdata/parent-variable-override.yaml10
-rw-r--r--ops/kontemplate/context/testdata/parent-variables.yaml10
-rw-r--r--ops/kontemplate/context/testdata/test-vars-override.yaml3
-rw-r--r--ops/kontemplate/context/testdata/test-vars.yaml5
-rw-r--r--ops/kontemplate/default.nix36
-rw-r--r--ops/kontemplate/deps.nix111
-rw-r--r--ops/kontemplate/docs/cluster-config.md106
-rw-r--r--ops/kontemplate/docs/resource-sets.md170
-rw-r--r--ops/kontemplate/docs/templates.md153
-rw-r--r--ops/kontemplate/docs/tips-and-tricks.md77
-rw-r--r--ops/kontemplate/example/other-config.yaml7
-rw-r--r--ops/kontemplate/example/prod-cluster.json16
-rw-r--r--ops/kontemplate/example/prod-cluster.yaml17
-rw-r--r--ops/kontemplate/example/some-api/some-api.yaml52
-rw-r--r--ops/kontemplate/example/some-api/some.cfg4
-rw-r--r--ops/kontemplate/image/Dockerfile15
-rw-r--r--ops/kontemplate/image/README.md12
-rw-r--r--ops/kontemplate/image/hashes2
-rw-r--r--ops/kontemplate/main.go242
-rw-r--r--ops/kontemplate/release.nix58
-rw-r--r--ops/kontemplate/templater/dns.go35
-rw-r--r--ops/kontemplate/templater/pass.go34
-rw-r--r--ops/kontemplate/templater/templater.go236
-rw-r--r--ops/kontemplate/templater/templater_test.go205
-rw-r--r--ops/kontemplate/templater/testdata/test-default.txt1
-rw-r--r--ops/kontemplate/templater/testdata/test-insertTemplate.txt1
-rw-r--r--ops/kontemplate/templater/testdata/test-template.txt1
-rw-r--r--ops/kontemplate/util/util.go58
-rw-r--r--ops/kontemplate/util/util_test.go83
-rw-r--r--ops/machines/all-systems.nix24
-rw-r--r--ops/machines/sanduny/default.nix111
-rw-r--r--ops/machines/whitby/OWNERS6
-rw-r--r--ops/machines/whitby/README.md5
-rw-r--r--ops/machines/whitby/default.nix653
-rw-r--r--ops/modules/.skip-subtree1
-rw-r--r--ops/modules/README.md7
-rw-r--r--ops/modules/atward.nix38
-rw-r--r--ops/modules/auto-deploy.nix104
-rw-r--r--ops/modules/automatic-gc.nix92
-rw-r--r--ops/modules/cgit/default.nix92
-rw-r--r--ops/modules/cgit/thttpd_cgi_idx.patch13
-rw-r--r--ops/modules/clbot.nix82
-rw-r--r--ops/modules/default-imports.nix14
-rw-r--r--ops/modules/default.nix2
-rw-r--r--ops/modules/gerrit-queue.nix52
-rw-r--r--ops/modules/irccat.nix62
-rw-r--r--ops/modules/josh.nix33
-rw-r--r--ops/modules/journaldriver.nix26
-rw-r--r--ops/modules/known-hosts.nix21
-rw-r--r--ops/modules/monorepo-gerrit.nix152
-rw-r--r--ops/modules/nixery.nix43
-rw-r--r--ops/modules/oauth2_proxy.nix60
-rw-r--r--ops/modules/open_eid.nix37
-rw-r--r--ops/modules/owothia.nix68
-rw-r--r--ops/modules/panettone.nix108
-rw-r--r--ops/modules/paroxysm.nix28
-rw-r--r--ops/modules/prometheus-fail2ban-exporter.nix52
-rw-r--r--ops/modules/quassel.nix79
-rw-r--r--ops/modules/restic.nix62
-rw-r--r--ops/modules/smtprelay.nix61
-rw-r--r--ops/modules/sourcegraph.nix60
-rw-r--r--ops/modules/tvl-buildkite.nix77
-rw-r--r--ops/modules/tvl-cache.nix19
-rw-r--r--ops/modules/tvl-slapd/default.nix81
-rw-r--r--ops/modules/tvl-users.nix94
-rw-r--r--ops/modules/v4l2loopback.nix12
-rw-r--r--ops/modules/www/atward.tvl.fyi.nix33
-rw-r--r--ops/modules/www/auth.tvl.fyi.nix24
-rw-r--r--ops/modules/www/b.tvl.fyi.nix32
-rw-r--r--ops/modules/www/base.nix41
-rw-r--r--ops/modules/www/cache.tvl.su.nix31
-rw-r--r--ops/modules/www/cl.tvl.fyi.nix30
-rw-r--r--ops/modules/www/code.tvl.fyi.nix45
-rw-r--r--ops/modules/www/cs.tvl.fyi.nix31
-rw-r--r--ops/modules/www/deploys.tvl.fyi.nix22
-rw-r--r--ops/modules/www/images.tvl.fyi.nix22
-rw-r--r--ops/modules/www/nixery.dev.nix21
-rw-r--r--ops/modules/www/self-redirect.nix27
-rw-r--r--ops/modules/www/static.tvl.fyi.nix42
-rw-r--r--ops/modules/www/status.tvl.su.nix25
-rw-r--r--ops/modules/www/tazj.in.nix40
-rw-r--r--ops/modules/www/todo.tvl.fyi.nix25
-rw-r--r--ops/modules/www/tvl.fyi.nix47
-rw-r--r--ops/modules/www/tvl.su.nix20
-rw-r--r--ops/modules/www/wigglydonke.rs.nix15
-rw-r--r--ops/mq_cli/.gitignore4
-rw-r--r--ops/mq_cli/CODE_OF_CONDUCT.md20
-rw-r--r--ops/mq_cli/Cargo.lock168
-rw-r--r--ops/mq_cli/Cargo.toml14
-rw-r--r--ops/mq_cli/LICENSE22
-rw-r--r--ops/mq_cli/README.md42
-rw-r--r--ops/mq_cli/default.nix3
-rw-r--r--ops/mq_cli/src/main.rs235
-rw-r--r--ops/nixos.nix63
-rw-r--r--ops/pipelines/README.md5
-rw-r--r--ops/pipelines/depot.nix49
-rw-r--r--ops/pipelines/static-pipeline.yaml116
-rw-r--r--ops/posix_mq.rs/.gitignore3
-rw-r--r--ops/posix_mq.rs/CODE_OF_CONDUCT.md20
-rw-r--r--ops/posix_mq.rs/Cargo.lock63
-rw-r--r--ops/posix_mq.rs/Cargo.toml12
-rw-r--r--ops/posix_mq.rs/LICENSE21
-rw-r--r--ops/posix_mq.rs/README.md44
-rw-r--r--ops/posix_mq.rs/default.nix3
-rw-r--r--ops/posix_mq.rs/src/error.rs122
-rw-r--r--ops/posix_mq.rs/src/lib.rs247
-rw-r--r--ops/posix_mq.rs/src/tests.rs21
-rw-r--r--ops/secrets/.skip-subtree2
-rw-r--r--ops/secrets/README.md1
-rw-r--r--ops/secrets/besadii.age19
-rw-r--r--ops/secrets/buildkite-agent-token.agebin0 -> 736 bytes
-rw-r--r--ops/secrets/buildkite-graphql-token.age16
-rw-r--r--ops/secrets/buildkite-ssh-private-key.agebin0 -> 1166 bytes
-rw-r--r--ops/secrets/clbot-ssh.agebin0 -> 1090 bytes
-rw-r--r--ops/secrets/clbot.age15
-rw-r--r--ops/secrets/default.nix3
-rw-r--r--ops/secrets/gerrit-queue.age17
-rw-r--r--ops/secrets/gerrit-secrets.age15
-rw-r--r--ops/secrets/grafana.age17
-rw-r--r--ops/secrets/irccat.age16
-rw-r--r--ops/secrets/journaldriver.agebin0 -> 3228 bytes
-rw-r--r--ops/secrets/keycloak-db.age15
-rw-r--r--ops/secrets/mkSecrets.nix27
-rw-r--r--ops/secrets/nix-cache-priv.agebin0 -> 848 bytes
-rw-r--r--ops/secrets/nix-cache-pub.age16
-rw-r--r--ops/secrets/oauth2_proxy.age16
-rw-r--r--ops/secrets/owothia.agebin0 -> 754 bytes
-rw-r--r--ops/secrets/panettone.age17
-rw-r--r--ops/secrets/secrets.nix46
-rw-r--r--ops/secrets/smtprelay.age16
-rw-r--r--ops/secrets/tf-glesys.agebin0 -> 874 bytes
-rw-r--r--ops/secrets/tf-keycloak.agebin0 -> 981 bytes
-rw-r--r--ops/secrets/tvl-alerts-bot-telegram-token.age16
-rw-r--r--ops/users/default.nix167
187 files changed, 11311 insertions, 0 deletions
diff --git a/ops/besadii/default.nix b/ops/besadii/default.nix
new file mode 100644
index 000000000000..1199c56cfb94
--- /dev/null
+++ b/ops/besadii/default.nix
@@ -0,0 +1,8 @@
+# This program is used as a Gerrit hook to trigger builds on
+# Buildkite, Sourcegraph reindexing and other maintenance tasks.
+{ depot, ... }:
+
+depot.nix.buildGo.program {
+  name = "besadii";
+  srcs = [ ./main.go ];
+}
diff --git a/ops/besadii/main.go b/ops/besadii/main.go
new file mode 100644
index 000000000000..412ae3a73bea
--- /dev/null
+++ b/ops/besadii/main.go
@@ -0,0 +1,558 @@
+// Copyright 2019-2020 Google LLC.
+// SPDX-License-Identifier: Apache-2.0
+//
+// besadii is a small CLI tool that is invoked as a hook by various
+// programs to cause CI-related actions.
+//
+// It supports the following modes & operations:
+//
+// Gerrit (ref-updated) hook:
+// - Trigger Buildkite CI builds
+// - Trigger SourceGraph repository index updates
+//
+// Buildkite (post-command) hook:
+// - Submit CL verification status back to Gerrit
+package main
+
+import (
+	"bytes"
+	"encoding/json"
+	"flag"
+	"fmt"
+	"io/ioutil"
+	"log/syslog"
+	"net/http"
+	"net/mail"
+	"os"
+	"os/user"
+	"path"
+	"regexp"
+	"strconv"
+	"strings"
+)
+
+// Regular expression to extract change ID out of a URL
+var changeIdRegexp = regexp.MustCompile(`^.*/(\d+)$`)
+
+// Regular expression to check if gerritChangeName valid. The
+// limitation could be what is allowed for a git branch name. For now
+// we want to have a stricter limitation for readability and ease of
+// use.
+var gerritChangeNameRegexp = `^[a-z0-9]+$`
+var gerritChangeNameCheck = regexp.MustCompile(gerritChangeNameRegexp)
+
+// besadii configuration file structure
+type config struct {
+	// Required configuration for Buildkite<>Gerrit monorepo
+	// integration.
+	Repository       string `json:"repository"`
+	Branch           string `json:"branch"`
+	GerritUrl        string `json:"gerritUrl"`
+	GerritUser       string `json:"gerritUser"`
+	GerritPassword   string `json:"gerritPassword"`
+	GerritLabel      string `json:"gerritLabel"`
+	BuildkiteOrg     string `json:"buildkiteOrg"`
+	BuildkiteProject string `json:"buildkiteProject"`
+	BuildkiteToken   string `json:"buildkiteToken"`
+	GerritChangeName string `json:"gerritChangeName"`
+
+	// Optional configuration for Sourcegraph trigger updates.
+	SourcegraphUrl   string `json:"sourcegraphUrl"`
+	SourcegraphToken string `json:"sourcegraphToken"`
+}
+
+// buildTrigger represents the information passed to besadii when it
+// is invoked as a Gerrit hook.
+//
+// https://gerrit.googlesource.com/plugins/hooks/+/HEAD/src/main/resources/Documentation/hooks.md
+type buildTrigger struct {
+	project string
+	ref     string
+	commit  string
+	author  string
+	email   string
+
+	changeId string
+	patchset string
+}
+
+type Author struct {
+	Name  string `json:"name"`
+	Email string `json:"email"`
+}
+
+// Build is the representation of a Buildkite build as described on
+// https://buildkite.com/docs/apis/rest-api/builds#create-a-build
+type Build struct {
+	Commit string            `json:"commit"`
+	Branch string            `json:"branch"`
+	Author Author            `json:"author"`
+	Env    map[string]string `json:"env"`
+}
+
+// BuildResponse is the representation of Buildkite's success response
+// after triggering a build. This has many fields, but we only need
+// one of them.
+type buildResponse struct {
+	WebUrl string `json:"web_url"`
+}
+
+// reviewInput is a struct representing the data submitted to Gerrit
+// to post a review on a CL.
+//
+// https://gerrit-review.googlesource.com/Documentation/rest-api-changes.html#review-input
+type reviewInput struct {
+	Message                        string         `json:"message"`
+	Labels                         map[string]int `json:"labels,omitempty"`
+	OmitDuplicateComments          bool           `json:"omit_duplicate_comments"`
+	IgnoreDefaultAttentionSetRules bool           `json:"ignore_default_attention_set_rules"`
+	Tag                            string         `json:"tag"`
+	Notify                         string         `json:"notify,omitempty"`
+}
+
+func defaultConfigLocation() (string, error) {
+	usr, err := user.Current()
+	if err != nil {
+		return "", fmt.Errorf("failed to get current user: %w", err)
+	}
+
+	return path.Join(usr.HomeDir, "besadii.json"), nil
+}
+
+func loadConfig() (*config, error) {
+	configPath := os.Getenv("BESADII_CONFIG")
+
+	if configPath == "" {
+		var err error
+		configPath, err = defaultConfigLocation()
+		if err != nil {
+			return nil, fmt.Errorf("failed to get config location: %w", err)
+		}
+	}
+
+	configJson, err := ioutil.ReadFile(configPath)
+	if err != nil {
+		return nil, fmt.Errorf("failed to load besadii config: %w", err)
+	}
+
+	var cfg config
+	err = json.Unmarshal(configJson, &cfg)
+	if err != nil {
+		return nil, fmt.Errorf("failed to unmarshal besadii config: %w", err)
+	}
+
+	// The default Gerrit label to set is 'Verified', unless specified otherwise.
+	if cfg.GerritLabel == "" {
+		cfg.GerritLabel = "Verified"
+	}
+
+	// The default text referring to a Gerrit Change in BuildKite.
+	if cfg.GerritChangeName == "" {
+		cfg.GerritChangeName = "cl"
+	}
+	if !gerritChangeNameCheck.MatchString(cfg.GerritChangeName) {
+		return nil, fmt.Errorf("invalid 'gerritChangeName': %s", cfg.GerritChangeName)
+	}
+
+	// Rudimentary config validation logic
+	if cfg.SourcegraphUrl != "" && cfg.SourcegraphToken == "" {
+		return nil, fmt.Errorf("'SourcegraphToken' must be set if 'SourcegraphUrl' is set")
+	}
+
+	if cfg.Repository == "" || cfg.Branch == "" {
+		return nil, fmt.Errorf("missing repository configuration (required: repository, branch)")
+	}
+
+	if cfg.GerritUrl == "" || cfg.GerritUser == "" || cfg.GerritPassword == "" {
+		return nil, fmt.Errorf("missing Gerrit configuration (required: gerritUrl, gerritUser, gerritPassword)")
+	}
+
+	if cfg.BuildkiteOrg == "" || cfg.BuildkiteProject == "" || cfg.BuildkiteToken == "" {
+		return nil, fmt.Errorf("mising Buildkite configuration (required: buildkiteOrg, buildkiteProject, buildkiteToken)")
+	}
+
+	return &cfg, nil
+}
+
+// linkToChange creates the full link to a change's patchset in Gerrit
+func linkToChange(cfg *config, changeId, patchset string) string {
+	return fmt.Sprintf("%s/c/%s/+/%s/%s", cfg.GerritUrl, cfg.Repository, changeId, patchset)
+}
+
+// updateGerrit posts a comment on a Gerrit CL to indicate the current build status.
+func updateGerrit(cfg *config, review reviewInput, changeId, patchset string) {
+	body, _ := json.Marshal(review)
+	reader := ioutil.NopCloser(bytes.NewReader(body))
+
+	url := fmt.Sprintf("%s/a/changes/%s/revisions/%s/review", cfg.GerritUrl, changeId, patchset)
+	req, err := http.NewRequest("POST", url, reader)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "failed to create an HTTP request: %w", err)
+		os.Exit(1)
+	}
+
+	req.SetBasicAuth(cfg.GerritUser, cfg.GerritPassword)
+	req.Header.Add("Content-Type", "application/json")
+
+	resp, err := http.DefaultClient.Do(req)
+	if err != nil {
+		fmt.Errorf("failed to update %s on %s: %w", cfg.GerritChangeName, cfg.GerritUrl, err)
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		respBody, _ := ioutil.ReadAll(resp.Body)
+		fmt.Fprintf(os.Stderr, "received non-success response from Gerrit: %s (%v)", respBody, resp.Status)
+	} else {
+		fmt.Printf("Added CI status comment on %s", linkToChange(cfg, changeId, patchset))
+	}
+}
+
+// Trigger a build of a given branch & commit on Buildkite
+func triggerBuild(cfg *config, log *syslog.Writer, trigger *buildTrigger) error {
+	env := make(map[string]string)
+	branch := trigger.ref
+
+	// Pass information about the originating Gerrit change to the
+	// build, if it is for a patchset.
+	//
+	// This information is later used by besadii when invoked by Gerrit
+	// to communicate the build status back to Gerrit.
+	headBuild := true
+	if trigger.changeId != "" && trigger.patchset != "" {
+		env["GERRIT_CHANGE_URL"] = linkToChange(cfg, trigger.changeId, trigger.patchset)
+		env["GERRIT_CHANGE_ID"] = trigger.changeId
+		env["GERRIT_PATCHSET"] = trigger.patchset
+		headBuild = false
+
+		// The branch doesn't have to be a real ref (it's just used to
+		// group builds), so make it the identifier for the CL.
+		branch = fmt.Sprintf("%s/%v", cfg.GerritChangeName, strings.Split(trigger.ref, "/")[3])
+	}
+
+	build := Build{
+		Commit: trigger.commit,
+		Branch: branch,
+		Env:    env,
+		Author: Author{
+			Name:  trigger.author,
+			Email: trigger.email,
+		},
+	}
+
+	body, _ := json.Marshal(build)
+	reader := ioutil.NopCloser(bytes.NewReader(body))
+
+	bkUrl := fmt.Sprintf("https://api.buildkite.com/v2/organizations/%s/pipelines/%s/builds", cfg.BuildkiteOrg, cfg.BuildkiteProject)
+	req, err := http.NewRequest("POST", bkUrl, reader)
+	if err != nil {
+		return fmt.Errorf("failed to create an HTTP request: %w", err)
+	}
+
+	req.Header.Add("Authorization", "Bearer "+cfg.BuildkiteToken)
+	req.Header.Add("Content-Type", "application/json")
+
+	resp, err := http.DefaultClient.Do(req)
+	if err != nil {
+		// This might indicate a temporary error on the Buildkite side.
+		return fmt.Errorf("failed to send Buildkite request: %w", err)
+	}
+	defer resp.Body.Close()
+
+	respBody, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
+		return fmt.Errorf("failed to read Buildkite response body: %w", err)
+	}
+
+	if resp.StatusCode != http.StatusCreated {
+		return fmt.Errorf("received non-success response from Buildkite: %s (%v)", respBody, resp.Status)
+	}
+
+	var buildResp buildResponse
+	err = json.Unmarshal(respBody, &buildResp)
+	if err != nil {
+		return fmt.Errorf("failed to unmarshal build response: %w", err)
+	}
+
+	fmt.Fprintf(log, "triggered build for ref %q at commit %q: %s", trigger.ref, trigger.commit, buildResp.WebUrl)
+
+	// For builds of the HEAD branch there is nothing else to do
+	if headBuild {
+		return nil
+	}
+
+	// Report the status back to the Gerrit CL so that users can click
+	// through to the running build.
+	msg := fmt.Sprintf("Started build for patchset #%s on: %s", trigger.patchset, buildResp.WebUrl)
+	review := reviewInput{
+		Message:               msg,
+		OmitDuplicateComments: true,
+		Tag:                   "autogenerated:buildkite~trigger",
+
+		// Do not update the attention set for this comment.
+		IgnoreDefaultAttentionSetRules: true,
+
+		Notify: "NONE",
+	}
+	updateGerrit(cfg, review, trigger.changeId, trigger.patchset)
+
+	return nil
+}
+
+// Trigger a Sourcegraph repository index update.
+//
+// https://docs.sourcegraph.com/admin/repo/webhooks
+func triggerIndexUpdate(cfg *config, log *syslog.Writer) error {
+	req, err := http.NewRequest("POST", cfg.SourcegraphUrl, nil)
+	if err != nil {
+		return err
+	}
+
+	req.Header.Add("Authorization", "token "+cfg.SourcegraphToken)
+
+	_, err = http.DefaultClient.Do(req)
+	if err != nil {
+		return fmt.Errorf("failed to trigger Sourcegraph index update: %w", err)
+	}
+
+	log.Info("triggered sourcegraph index update")
+	return nil
+}
+
+// Gerrit passes more flags than we want, but Rob Pike decided[0] in
+// 2013 that the Go art project will not allow users to ignore flags
+// because he "doesn't like it". This function allows users to ignore
+// flags.
+//
+// [0]: https://github.com/golang/go/issues/6112#issuecomment-66083768
+func ignoreFlags(ignore []string) {
+	for _, f := range ignore {
+		flag.String(f, "", "flag to ignore")
+	}
+}
+
+// Extract the username & email from Gerrit's uploader flag and set it
+// on the trigger struct, for display in Buildkite.
+func extractChangeUploader(uploader string, trigger *buildTrigger) error {
+	// Gerrit passes the uploader in another extra layer of quotes.
+	uploader, err := strconv.Unquote(uploader)
+	if err != nil {
+		return fmt.Errorf("failed to unquote email - forgot quotes on manual invocation?: %w", err)
+	}
+
+	// Extract the uploader username & email from the input passed by
+	// Gerrit (in RFC 5322 format).
+	addr, err := mail.ParseAddress(uploader)
+	if err != nil {
+		return fmt.Errorf("invalid change uploader (%s): %w", uploader, err)
+	}
+
+	trigger.author = addr.Name
+	trigger.email = addr.Address
+
+	return nil
+}
+
+// Extract the buildtrigger struct out of the flags passed to besadii
+// when invoked as Gerrit's 'patchset-created' hook. This hook is used
+// for triggering CI on in-progress CLs.
+func buildTriggerFromPatchsetCreated(cfg *config) (*buildTrigger, error) {
+	// Information that needs to be returned
+	var trigger buildTrigger
+
+	// Information that is only needed for parsing
+	var targetBranch, changeUrl, uploader, kind string
+
+	flag.StringVar(&trigger.project, "project", "", "Gerrit project")
+	flag.StringVar(&trigger.commit, "commit", "", "commit hash")
+	flag.StringVar(&trigger.patchset, "patchset", "", "patchset ID")
+
+	flag.StringVar(&targetBranch, "branch", "", "CL target branch")
+	flag.StringVar(&changeUrl, "change-url", "", "HTTPS URL of change")
+	flag.StringVar(&uploader, "uploader", "", "Change uploader name & email")
+	flag.StringVar(&kind, "kind", "", "Kind of patchset")
+
+	// patchset-created also passes various flags which we don't need.
+	ignoreFlags([]string{"topic", "change", "uploader-username", "change-owner", "change-owner-username"})
+
+	flag.Parse()
+
+	// Ignore patchsets which do not contain code changes
+	if kind == "NO_CODE_CHANGE" || kind == "NO_CHANGE" {
+		return nil, nil
+	}
+
+	// Parse username & email
+	err := extractChangeUploader(uploader, &trigger)
+	if err != nil {
+		return nil, err
+	}
+
+	// If the patchset is not for the HEAD branch of the monorepo, then
+	// we can ignore it. It might be some other kind of change
+	// (refs/meta/config or Gerrit-internal), but it is not an error.
+	if trigger.project != cfg.Repository || targetBranch != cfg.Branch {
+		return nil, nil
+	}
+
+	// Change ID is not directly passed in the numeric format, so we
+	// need to extract it out of the URL
+	matches := changeIdRegexp.FindStringSubmatch(changeUrl)
+	trigger.changeId = matches[1]
+
+	// Construct the CL ref from which the build should happen.
+	changeId, _ := strconv.Atoi(trigger.changeId)
+	trigger.ref = fmt.Sprintf(
+		"refs/changes/%02d/%s/%s",
+		changeId%100, trigger.changeId, trigger.patchset,
+	)
+
+	return &trigger, nil
+}
+
+// Extract the buildtrigger struct out of the flags passed to besadii
+// when invoked as Gerrit's 'change-merged' hook. This hook is used
+// for triggering HEAD builds after change submission.
+func buildTriggerFromChangeMerged(cfg *config) (*buildTrigger, error) {
+	// Information that needs to be returned
+	var trigger buildTrigger
+
+	// Information that is only needed for parsing
+	var targetBranch, submitter string
+
+	flag.StringVar(&trigger.project, "project", "", "Gerrit project")
+	flag.StringVar(&trigger.commit, "commit", "", "Commit hash")
+	flag.StringVar(&submitter, "submitter", "", "Submitter email & username")
+	flag.StringVar(&targetBranch, "branch", "", "CL target branch")
+
+	// Ignore extra flags passed by change-merged
+	ignoreFlags([]string{"change", "topic", "change-url", "submitter-username", "newrev", "change-owner", "change-owner-username"})
+
+	flag.Parse()
+
+	// Parse username & email
+	err := extractChangeUploader(submitter, &trigger)
+	if err != nil {
+		return nil, err
+	}
+
+	// If the patchset is not for the HEAD branch of the monorepo, then
+	// we can ignore it.
+	if trigger.project != cfg.Repository || targetBranch != cfg.Branch {
+		return nil, nil
+	}
+
+	trigger.ref = "refs/heads/" + targetBranch
+
+	return &trigger, nil
+}
+
+func gerritHookMain(cfg *config, log *syslog.Writer, trigger *buildTrigger) {
+	if trigger == nil {
+		// The hook was not for something we care about.
+		os.Exit(0)
+	}
+
+	err := triggerBuild(cfg, log, trigger)
+
+	if err != nil {
+		log.Err(fmt.Sprintf("failed to trigger Buildkite build: %s", err))
+	}
+
+	if cfg.SourcegraphUrl != "" && trigger.ref == "refs/heads/canon" {
+		err = triggerIndexUpdate(cfg, log)
+		if err != nil {
+			log.Err(fmt.Sprintf("failed to trigger sourcegraph index update: %s", err))
+		}
+	}
+}
+
+func postCommandMain(cfg *config) {
+	changeId := os.Getenv("GERRIT_CHANGE_ID")
+	patchset := os.Getenv("GERRIT_PATCHSET")
+
+	if changeId == "" || patchset == "" {
+		// If these variables are unset, but the hook was invoked, the
+		// build was most likely for a branch and not for a CL - no status
+		// needs to be reported back to Gerrit!
+		fmt.Printf("This isn't a %s build, nothing to do. Have a nice day!\n", cfg.GerritChangeName)
+		return
+	}
+
+	if os.Getenv("BUILDKITE_LABEL") != ":duck:" {
+		// this is not the build stage, don't do anything.
+		return
+	}
+
+	var vote int
+	var verb string
+	var notify string
+
+	if os.Getenv("BUILDKITE_COMMAND_EXIT_STATUS") == "0" {
+		vote = 1 // automation passed: +1 in Gerrit
+		verb = "passed"
+		notify = "NONE"
+	} else {
+		vote = -1
+		verb = "failed"
+		notify = "OWNER"
+	}
+
+	msg := fmt.Sprintf("Build of patchset %s %s: %s", patchset, verb, os.Getenv("BUILDKITE_BUILD_URL"))
+	review := reviewInput{
+		Message:               msg,
+		OmitDuplicateComments: true,
+		Labels: map[string]int{
+			cfg.GerritLabel: vote,
+		},
+
+		// Update the attention set if we are failing this patchset.
+		IgnoreDefaultAttentionSetRules: vote == 1,
+
+		Tag: "autogenerated:buildkite~result",
+
+		Notify: notify,
+	}
+	updateGerrit(cfg, review, changeId, patchset)
+}
+
+func main() {
+	// Logging happens in syslog because it's almost impossible to get
+	// output out of Gerrit hooks otherwise.
+	log, err := syslog.New(syslog.LOG_INFO|syslog.LOG_USER, "besadii")
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "failed to open syslog: %s\n", err)
+		os.Exit(1)
+	}
+
+	log.Info(fmt.Sprintf("besadii called with arguments: %v", os.Args))
+
+	bin := path.Base(os.Args[0])
+	cfg, err := loadConfig()
+
+	if err != nil {
+		log.Crit(fmt.Sprintf("besadii configuration error: %v", err))
+		os.Exit(4)
+	}
+
+	if bin == "patchset-created" {
+		trigger, err := buildTriggerFromPatchsetCreated(cfg)
+		if err != nil {
+			log.Crit(fmt.Sprintf("failed to parse 'patchset-created' invocation from args: %v", err))
+			os.Exit(1)
+		}
+		gerritHookMain(cfg, log, trigger)
+	} else if bin == "change-merged" {
+		trigger, err := buildTriggerFromChangeMerged(cfg)
+		if err != nil {
+			log.Crit(fmt.Sprintf("failed to parse 'change-merged' invocation from args: %v", err))
+			os.Exit(1)
+		}
+		gerritHookMain(cfg, log, trigger)
+	} else if bin == "post-command" {
+		postCommandMain(cfg)
+	} else {
+		fmt.Fprintf(os.Stderr, "besadii does not know how to be invoked as %q, sorry!", bin)
+		os.Exit(1)
+	}
+}
diff --git a/ops/deploy-whitby/default.nix b/ops/deploy-whitby/default.nix
new file mode 100644
index 000000000000..aafe798cbfa7
--- /dev/null
+++ b/ops/deploy-whitby/default.nix
@@ -0,0 +1,31 @@
+{ pkgs, ... }:
+
+pkgs.stdenv.mkDerivation {
+  name = "deploy-whitby";
+
+  phases = [ "installPhase" "installCheckPhase" ];
+
+  nativeBuildInputs = with pkgs; [
+    makeWrapper
+  ];
+
+  installPhase = ''
+    mkdir -p $out/bin
+    makeWrapper ${./deploy-whitby.sh} $out/bin/deploy-whitby.sh \
+      --prefix PATH : ${with pkgs; lib.makeBinPath [
+        ansi2html
+        git
+        jq
+        nvd
+      ]}
+  '';
+
+  installCheckInputs = with pkgs; [
+    shellcheck
+  ];
+
+  doInstallCheck = true;
+  installCheckPhase = ''
+    shellcheck $out/bin/deploy-whitby.sh
+  '';
+}
diff --git a/ops/deploy-whitby/deploy-whitby.sh b/ops/deploy-whitby/deploy-whitby.sh
new file mode 100755
index 000000000000..756aa7ae0801
--- /dev/null
+++ b/ops/deploy-whitby/deploy-whitby.sh
@@ -0,0 +1,46 @@
+#!/usr/bin/env bash
+set -Ceuo pipefail
+
+HTML_ROOT="${HTML_ROOT:-/var/html/deploys.tvl.fyi}"
+URL_BASE="${URL_BASE:-https://deploys.tvl.fyi/diff}"
+IRCCAT_PORT="${IRCCAT_PORT:-4722}"
+
+drv_hash() {
+    basename "$1" | sed 's/-.*//'
+}
+
+new_rev="$1"
+
+if [ -z "$new_rev" ]; then
+    >&2 echo "Usage: $0 <new_rev>"
+    exit 1
+fi
+
+if [ -d "/tmp/deploy.worktree" ]; then
+    >&2 echo "/tmp/deploy.worktree exists - exiting in case another deploy is currently running"
+    exit 1
+fi
+
+worktree_dir=/tmp/worktree_dir
+
+cleanup() {
+    rm -rf "$worktree_dir"
+}
+trap cleanup EXIT
+
+git clone https://cl.tvl.fyi/depot "$worktree_dir" --reference /depot
+git -C "$worktree_dir" checkout "$new_rev"
+
+current=$(nix show-derivation /run/current-system | jq -r 'keys | .[0]')
+new=$(nix-instantiate -A ops.nixos.whitbySystem "$worktree_dir")
+
+diff_filename="$(drv_hash "$current")..$(drv_hash "$new").html"
+nvd --color always diff "$current" "$new" \
+    | ansi2html \
+    >| "$HTML_ROOT/diff/$diff_filename"
+chmod a+r "$HTML_ROOT/diff/$diff_filename"
+
+echo "#tvl whitby is being deployed! system diff: $URL_BASE/$diff_filename" \
+    | nc -w 5 -N localhost "$IRCCAT_PORT"
+
+# TODO(grfn): Actually do the deploy
diff --git a/ops/dns/README.md b/ops/dns/README.md
new file mode 100644
index 000000000000..2290299fe46c
--- /dev/null
+++ b/ops/dns/README.md
@@ -0,0 +1,11 @@
+DNS configuration
+=================
+
+This folder contains configuration for our DNS zones. The zones are hosted with
+Google Cloud DNS, which supports zone-file based import/export.
+
+Currently there is no automation to deploy these zones, but CI will check their
+integrity.
+
+*Note: While each zone file specifies an SOA record, it only exists to satisfy
+`named-checkzone`. Cloud DNS manages this record for us.*
diff --git a/ops/dns/default.nix b/ops/dns/default.nix
new file mode 100644
index 000000000000..ad6e136f2756
--- /dev/null
+++ b/ops/dns/default.nix
@@ -0,0 +1,14 @@
+# Performs simple (local-only) validity checks on DNS zones.
+{ depot, pkgs, ... }:
+
+let
+  checkZone = zone: file: pkgs.runCommandNoCC "${zone}-check" { } ''
+    ${pkgs.bind}/bin/named-checkzone -i local ${zone} ${file} | tee $out
+  '';
+
+in
+depot.nix.readTree.drvTargets {
+  nixery-dev = checkZone "nixery.dev" ./nixery.dev.zone;
+  tvl-fyi = checkZone "tvl.fyi" ./tvl.fyi.zone;
+  tvl-su = checkZone "tvl.su" ./tvl.su.zone;
+}
diff --git a/ops/dns/nixery.dev.zone b/ops/dns/nixery.dev.zone
new file mode 100644
index 000000000000..44cabab29bd8
--- /dev/null
+++ b/ops/dns/nixery.dev.zone
@@ -0,0 +1,10 @@
+;; Google Cloud DNS zone for nixery.dev
+nixery.dev. 21600 IN SOA ns-cloud-b1.googledomains.com. cloud-dns-hostmaster.google.com. 5 21600 3600 259200 300
+nixery.dev. 21600 IN NS ns-cloud-b1.googledomains.com.
+nixery.dev. 21600 IN NS ns-cloud-b2.googledomains.com.
+nixery.dev. 21600 IN NS ns-cloud-b3.googledomains.com.
+nixery.dev. 21600 IN NS ns-cloud-b4.googledomains.com.
+
+;; Records for pointing nixery.dev to whitby
+nixery.dev. 300 IN A 49.12.129.211
+nixery.dev. 300 IN AAAA 2a01:4f8:242:5b21:0:feed:edef:beef
diff --git a/ops/dns/tvl.fyi.zone b/ops/dns/tvl.fyi.zone
new file mode 100644
index 000000000000..d1961c6a7a82
--- /dev/null
+++ b/ops/dns/tvl.fyi.zone
@@ -0,0 +1,39 @@
+;; Google Cloud DNS zone for tvl.fyi.
+;;
+;; This zone is hosted in the project 'tvl-fyi', and registered via
+;; Google Domains.
+tvl.fyi. 21600 IN SOA ns-cloud-b1.googledomains.com. cloud-dns-hostmaster.google.com. 20 21600 3600 259200 300
+tvl.fyi. 21600 IN NS ns-cloud-b1.googledomains.com.
+tvl.fyi. 21600 IN NS ns-cloud-b2.googledomains.com.
+tvl.fyi. 21600 IN NS ns-cloud-b3.googledomains.com.
+tvl.fyi. 21600 IN NS ns-cloud-b4.googledomains.com.
+
+;; Mail forwarding (via domains.google)
+tvl.fyi. 3600 IN MX 5 gmr-smtp-in.l.google.com.
+tvl.fyi. 3600 IN MX 10 alt1.gmr-smtp-in.l.google.com.
+tvl.fyi. 3600 IN MX 20 alt2.gmr-smtp-in.l.google.com.
+tvl.fyi. 3600 IN MX 30 alt3.gmr-smtp-in.l.google.com.
+tvl.fyi. 3600 IN MX 40 alt4.gmr-smtp-in.l.google.com.
+
+;; Landing website is hosted on whitby on the apex.
+tvl.fyi. 21600 IN A 49.12.129.211
+tvl.fyi. 21600 IN AAAA 2a01:4f8:242:5b21:0:feed:edef:beef
+
+;; TVL infrastructure
+whitby.tvl.fyi. 21600 IN A 49.12.129.211
+whitby.tvl.fyi. 21600 IN AAAA 2a01:4f8:242:5b21:0:feed:edef:beef
+
+;; TVL services
+at.tvl.fyi.      21600 IN CNAME whitby.tvl.fyi.
+atward.tvl.fyi.  21600 IN CNAME whitby.tvl.fyi.
+b.tvl.fyi.       21600 IN CNAME whitby.tvl.fyi.
+cache.tvl.fyi.   21600 IN CNAME whitby.tvl.fyi.
+cl.tvl.fyi.      21600 IN CNAME whitby.tvl.fyi.
+code.tvl.fyi.    21600 IN CNAME whitby.tvl.fyi.
+cs.tvl.fyi.      21600 IN CNAME whitby.tvl.fyi.
+deploys.tvl.fyi. 21600 IN CNAME whitby.tvl.fyi.
+images.tvl.fyi.  21600 IN CNAME whitby.tvl.fyi.
+login.tvl.fyi.   21600 IN CNAME whitby.tvl.fyi.
+static.tvl.fyi.  21600 IN CNAME whitby.tvl.fyi.
+status.tvl.fyi.  21600 IN CNAME whitby.tvl.fyi.
+todo.tvl.fyi.    21600 IN CNAME whitby.tvl.fyi.
diff --git a/ops/dns/tvl.su.zone b/ops/dns/tvl.su.zone
new file mode 100644
index 000000000000..da46752f13ba
--- /dev/null
+++ b/ops/dns/tvl.su.zone
@@ -0,0 +1,51 @@
+;; Google Cloud DNS for tvl.su.
+;;
+;; This zone is hosted in the project 'tvl-fyi', and registered via
+;; NIC.RU.
+;;
+;; This zone is mostly identical to tvl.fyi and will eventually become
+;; the primary zone.
+tvl.su. 21600 IN SOA ns-cloud-b1.googledomains.com. cloud-dns-hostmaster.google.com. 33 21600 3600 259200 300
+tvl.su. 21600 IN NS ns-cloud-b1.googledomains.com.
+tvl.su. 21600 IN NS ns-cloud-b2.googledomains.com.
+tvl.su. 21600 IN NS ns-cloud-b3.googledomains.com.
+tvl.su. 21600 IN NS ns-cloud-b4.googledomains.com.
+
+;; Landing website is hosted on whitby on the apex.
+tvl.su. 21600 IN A 49.12.129.211
+tvl.su. 21600 IN AAAA 2a01:4f8:242:5b21:0:feed:edef:beef
+
+;; TVL infrastructure
+whitby.tvl.su. 21600 IN A 49.12.129.211
+whitby.tvl.su. 21600 IN AAAA 2a01:4f8:242:5b21:0:feed:edef:beef
+
+;; TVL services
+at.tvl.su.     21600 IN CNAME whitby.tvl.su.
+atward.tvl.su. 21600 IN CNAME whitby.tvl.su.
+b.tvl.su.      21600 IN CNAME whitby.tvl.su.
+cache.tvl.su.  21600 IN CNAME whitby.tvl.su.
+cl.tvl.su.     21600 IN CNAME whitby.tvl.su.
+code.tvl.su.   21600 IN CNAME whitby.tvl.su.
+cs.tvl.su.     21600 IN CNAME whitby.tvl.su.
+images.tvl.su. 21600 IN CNAME whitby.tvl.su.
+login.tvl.su.  21600 IN CNAME whitby.tvl.su.
+static.tvl.su. 21600 IN CNAME whitby.tvl.su.
+status.tvl.su. 21600 IN CNAME whitby.tvl.su.
+todo.tvl.su.   21600 IN CNAME whitby.tvl.su.
+
+;; Google Workspaces domain verification
+tvl.su. 21600 IN TXT "google-site-verification=3ksTBzFK3lZlzD3ddBfpaHs9qasfAiYBmvbW2T_ejH4"
+
+;; Google Workspaces email configuration
+tvl.su. 21600 IN MX 1 aspmx.l.google.com.
+tvl.su. 21600 IN MX 5 alt1.aspmx.l.google.com.
+tvl.su. 21600 IN MX 5 alt2.aspmx.l.google.com.
+tvl.su. 21600 IN MX 10 alt3.aspmx.l.google.com.
+tvl.su. 21600 IN MX 10 alt4.aspmx.l.google.com.
+tvl.su. 21600 IN TXT "v=spf1 include:_spf.google.com ~all"
+google._domainkey.tvl.su. 21600 IN TXT ("v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAlqCbnGa8oPwrudJK60l6MJj3NBnwj8wAPXNGtYy2SXrOBi7FT+ySwW7ATpfv6Xq9zGDUWJsENPUlFmvDiUs7Qi4scnNvSO1L+sDseB9/q1m3gMFVnTuieDO/" "T+KKkg0+uYgMM7YX5PahsAAJJ+EMb/r4afl3tcBMPR64VveKQ0hiSHA4zIYPsB9FB+b8S5C46uyY0r6WR7IzGjq2Gzb1do0kxvaKItTITWLSImcUu5ZZuXOUKJb441frVBWur5lXaYuedkxb1IRTTK0V/mBODE1D7k73MxGrqlzaMPdCqz+c3hRE18WVUkBTYjANVXDrs3yzBBVxaIAeu++vkO6BvQIDAQAB")
+
+;; Google Workspaces site aliases
+docs.tvl.su. 21600 IN CNAME ghs.googlehosted.com.
+groups.tvl.su. 21600 IN CNAME ghs.googlehosted.com.
+mail.tvl.su. 21600 IN CNAME ghs.googlehosted.com.
diff --git a/ops/gerrit-tvl/HttpModule.java b/ops/gerrit-tvl/HttpModule.java
new file mode 100644
index 000000000000..6d785c0817fc
--- /dev/null
+++ b/ops/gerrit-tvl/HttpModule.java
@@ -0,0 +1,14 @@
+package su.tvl.gerrit;
+
+import com.google.gerrit.extensions.registration.DynamicSet;
+import com.google.gerrit.extensions.webui.JavaScriptPlugin;
+import com.google.gerrit.extensions.webui.WebUiPlugin;
+import com.google.inject.servlet.ServletModule;
+
+public final class HttpModule extends ServletModule {
+
+  @Override
+  protected void configureServlets() {
+    DynamicSet.bind(binder(), WebUiPlugin.class).toInstance(new JavaScriptPlugin("tvl.js"));
+  }
+}
diff --git a/ops/gerrit-tvl/MANIFEST.MF b/ops/gerrit-tvl/MANIFEST.MF
new file mode 100644
index 000000000000..bfe4eedeb6ac
--- /dev/null
+++ b/ops/gerrit-tvl/MANIFEST.MF
@@ -0,0 +1,2 @@
+Gerrit-HttpModule: su.tvl.gerrit.HttpModule
+Gerrit-PluginName: tvl
diff --git a/ops/gerrit-tvl/README.md b/ops/gerrit-tvl/README.md
new file mode 100644
index 000000000000..1b88600f197f
--- /dev/null
+++ b/ops/gerrit-tvl/README.md
@@ -0,0 +1,6 @@
+# gerrit-tvl
+
+A Gerrit plugin that does TVL-specific things.
+
+You probably want to take inspiration from this rather than using it directly,
+as it has a variety of TVL-ish assumptions baked into it.
diff --git a/ops/gerrit-tvl/default.nix b/ops/gerrit-tvl/default.nix
new file mode 100644
index 000000000000..f3bec7a3a242
--- /dev/null
+++ b/ops/gerrit-tvl/default.nix
@@ -0,0 +1,33 @@
+{ depot, pkgs, lib, ... }:
+
+let
+  classPath = lib.concatStringsSep ":" [
+    "${depot.third_party.gerrit}/share/api/extension-api_deploy.jar"
+  ];
+in
+pkgs.stdenvNoCC.mkDerivation rec {
+  name = "${pname}-${version}.jar";
+  pname = "gerrit-tvl";
+  version = "0.0.1";
+
+  src = ./.;
+
+  nativeBuildInputs = with pkgs; [
+    jdk
+  ];
+
+  buildPhase = ''
+    mkdir $NIX_BUILD_TOP/build
+
+    # Build Java components.
+    export JAVAC="javac -cp ${classPath} -d $NIX_BUILD_TOP/build --release 11"
+    $JAVAC ./HttpModule.java
+
+    # Install static files.
+    cp -R static $NIX_BUILD_TOP/build/static
+  '';
+
+  installPhase = ''
+    jar --create --file $out --manifest $src/MANIFEST.MF -C $NIX_BUILD_TOP/build .
+  '';
+}
diff --git a/ops/gerrit-tvl/static/tvl.js b/ops/gerrit-tvl/static/tvl.js
new file mode 100644
index 000000000000..684636de3084
--- /dev/null
+++ b/ops/gerrit-tvl/static/tvl.js
@@ -0,0 +1,189 @@
+// vim: set noai ts=2 sw=2 et: */
+
+// This is a read-only Buildkite token: it was generated by lukegb@, and has
+// read_builds, read_build_logs, and read_pipelines permissions.
+const BUILDKITE_TOKEN = 'a150658fb61062e432f13a032962d70fa9352088';
+
+function encodeParams(p) {
+  const pieces = [];
+  for (let k of Object.getOwnPropertyNames(p)) {
+    pieces.push(`${encodeURIComponent(k)}=${encodeURIComponent(p[k])}`);
+  }
+  return pieces.join('&');
+}
+
+function formatDuration(from, to) {
+  const millisecondsTook = Math.floor(to.valueOf() - from.valueOf());
+  if (millisecondsTook < 2000) return `${millisecondsTook} ms`;
+  const secondsTook = Math.floor(millisecondsTook / 1000);
+  if (secondsTook < 100) return `${secondsTook} seconds`;
+  const minutesTook = Math.floor(secondsTook / 60);
+  if (minutesTook < 60) return `${minutesTook} minutes`;
+  const hoursTook = Math.floor(minutesTook / 60);
+  const minutesRemainder = minutesTook - (hoursTook * 60);
+  return `${hoursTook}hr ${minutesRemainder}min`;
+}
+
+// Maps the status of a Buildkite *job* to the statuses available for
+// a Gerrit check.
+//
+// Note that jobs can have statuses that, according to the Buildkite
+// documentation, are only available for builds, and maybe vice-versa.
+// To deal with this we simply cover all statuses for all types here.
+//
+// Buildkite job statuses: https://buildkite.com/docs/pipelines/notifications#job-states
+//
+// Gerrit check statuses: https://gerrit.googlesource.com/gerrit/+/v3.4.0/polygerrit-ui/app/api/checks.ts#167
+//
+// TODO(tazjin): Use SCHEDULED status once we have upgraded Gerrit
+// past 3.4
+function jobStateToCheckRunStatus(state) {
+  const status = {
+    // Statuses documented for both types
+    'blocked': 'RUNNABLE',
+    'canceled': 'COMPLETED',
+    'canceling': 'RUNNING',
+    'running': 'RUNNING',
+    'scheduled': 'RUNNABLE',
+    'skipped': 'COMPLETED',
+
+    // Statuses only documented for builds
+    'creating': 'RUNNABLE',
+    'failed': 'COMPLETED',
+    'not_run': 'COMPLETED',
+    'passed': 'COMPLETED',
+
+    // Statuses only documented for jobs
+    'accepted': 'RUNNABLE',
+    'assigned': 'RUNNABLE',
+    'blocked_failed': 'COMPLETED',
+    'broken': 'COMPLETED',
+    'finished': 'COMPLETED',
+    'limited': 'RUNNABLE',
+    'limiting': 'RUNNABLE',
+    'pending': 'RUNNABLE',
+    'timed_out': 'COMPLETED',
+    'timing_out': 'RUNNING',
+    'unblocked': 'RUNNABLE',
+    'unblocked_failed': 'COMPLETED',
+    'waiting': 'RUNNABLE',
+    'waiting_failed': 'COMPLETED',
+  }[state];
+
+  if (!status) {
+    console.log(`unknown Buildkite job state: ${state}`);
+  }
+
+  return status;
+}
+
+const tvlChecksProvider = {
+  async fetch(change) {
+    let {patchsetSha, repo} = change;
+
+    const experiments = window.ENABLED_EXPERIMENTS || [];
+    if (experiments.includes("UiFeature__tvl_check_debug")) {
+      patchsetSha = '76692104f58b849b1503a8d8a700298003fa7b5f';
+      repo = 'depot';
+    }
+
+    if (repo !== 'depot') {
+      // We only handle TVL's depot at the moment.
+      return {responseCode: 'OK'};
+    }
+
+    const params = {
+      commit: patchsetSha,
+    };
+    const url = `https://api.buildkite.com/v2/organizations/tvl/pipelines/depot/builds?${encodeParams(params)}`;
+    const resp = await fetch(url, {
+      headers: {
+        Authorization: `Bearer ${BUILDKITE_TOKEN}`,
+      },
+    });
+    const respJSON = await resp.json();
+
+    const runs = [];
+    for (let i = 0; i < respJSON.length; i++) {
+      const attempt = respJSON.length - i;
+      const build = respJSON[i];
+
+      for (let job of build.jobs) {
+        // Skip non-command jobs (e.g. waiting/grouping jobs)
+        if (job.type !== 'script') {
+          continue;
+        }
+
+        // Skip jobs marked as 'broken' (this means they were skipped
+        // intentionally)
+        if (job.state === 'broken') {
+          continue;
+        }
+
+        // TODO(lukegb): add the ability to retry these
+        const checkRun = {
+          patchset: parseInt(build.env.GERRIT_PATCHSET, 10),
+          attempt: attempt,
+          externalId: job.id,
+          checkName: job.name,
+          checkDescription: job.command,
+          checkLink: job.web_url,
+          status: jobStateToCheckRunStatus(job.state),
+          labelName: 'Verified',
+        };
+
+        if (job.scheduled_at) {
+          checkRun.scheduledTimestamp = new Date(job.scheduled_at);
+        }
+
+        if (job.started_at) {
+          checkRun.startedTimestamp = new Date(job.started_at);
+        }
+
+        if (job.finished_at) {
+          checkRun.finishedTimestamp = new Date(job.finished_at);
+        }
+
+        let statusDescription = job.state;
+        if (checkRun.startedTimestamp && checkRun.finishedTimestamp) {
+          statusDescription = `${statusDescription} in ${formatDuration(checkRun.startedTimestamp, checkRun.finishedTimestamp)}`;
+        } else if (checkRun.startedTimestamp) {
+          statusDescription = `${statusDescription} for ${formatDuration(checkRun.startedTimestamp, new Date())}`;
+        } else if (checkRun.scheduledTimestamp) {
+          statusDescription = `${statusDescription} for ${formatDuration(checkRun.scheduledTimestamp, new Date())}`;
+        }
+        checkRun.statusDescription = statusDescription;
+
+        if (['failed', 'timed_out'].includes(job.state)) {
+          const result = {
+            // TODO(lukegb): get the log as the message here (the Gerrit
+            // implementation doesn't yet seem to support newlines in message
+            // strings...)
+            links: [{
+              url: job.web_url,
+              tooltip: "Buildkite",
+              primary: true,
+              icon: 'EXTERNAL',
+            }],
+            category: 'ERROR',
+            summary: `${job.command} failed`,
+          };
+          checkRun.results = [result];
+        }
+
+        runs.push(checkRun);
+      }
+    }
+
+    return {
+      responseCode: 'OK',
+      runs: runs,
+    };
+  },
+};
+
+Gerrit.install(plugin => {
+  console.log('TVL plugin initialising');
+
+  plugin.checks().register(tvlChecksProvider);
+});
diff --git a/ops/glesys/.gitignore b/ops/glesys/.gitignore
new file mode 100644
index 000000000000..de8e8f12ee98
--- /dev/null
+++ b/ops/glesys/.gitignore
@@ -0,0 +1,3 @@
+.terraform*
+terraform.tfstate*
+.envrc
diff --git a/ops/glesys/README.md b/ops/glesys/README.md
new file mode 100644
index 000000000000..00f61a93604b
--- /dev/null
+++ b/ops/glesys/README.md
@@ -0,0 +1,20 @@
+Terraform for GleSYS
+======================
+
+This contains the Terraform configuration for deploying TVL's
+infrastructure at [GleSYS](https://glesys.com). This includes object
+storage (e.g. for backups and Terraform state) and DNS.
+
+Secrets are needed for applying this. The encrypted file
+`//ops/secrets/tf-glesys.age` contains `export` calls which should be
+sourced, for example via `direnv`, by users with the appropriate
+credentials.
+
+An example `direnv` configuration used by tazjin is this:
+
+```
+# //ops/secrets/.envrc
+source_up
+eval $(age --decrypt -i ~/.ssh/id_ed25519 $(git rev-parse --show-toplevel)/ops/secrets/tf-glesys.age)
+watch_file $(git rev-parse --show-toplevel)/secrets/tf-glesys.age
+```
diff --git a/ops/glesys/default.nix b/ops/glesys/default.nix
new file mode 100644
index 000000000000..2dfb505fb423
--- /dev/null
+++ b/ops/glesys/default.nix
@@ -0,0 +1,8 @@
+{ depot, pkgs, ... }:
+
+depot.nix.readTree.drvTargets {
+  # Provide a Terraform wrapper with the right provider installed.
+  terraform = pkgs.terraform.withPlugins (_: [
+    depot.third_party.terraform-provider-glesys
+  ]);
+}
diff --git a/ops/glesys/dns-nixery-dev.tf b/ops/glesys/dns-nixery-dev.tf
new file mode 100644
index 000000000000..53a421d20e34
--- /dev/null
+++ b/ops/glesys/dns-nixery-dev.tf
@@ -0,0 +1,44 @@
+# DNS configuration for nixery.dev
+#
+# TODO(tazjin): Figure out what to do with //ops/dns for this. I'd
+# like to keep zonefiles in case we move providers again, but maybe
+# generate something from them. Not sure yet.
+
+resource "glesys_dnsdomain" "nixery_dev" {
+  name = "nixery.dev"
+}
+
+resource "glesys_dnsdomain_record" "nixery_dev_apex_A" {
+  domain = glesys_dnsdomain.nixery_dev.id
+  host   = "@"
+  type   = "A"
+  data   = var.whitby_ipv4
+}
+
+resource "glesys_dnsdomain_record" "nixery_dev_apex_AAAA" {
+  domain = glesys_dnsdomain.nixery_dev.id
+  host   = "@"
+  type   = "AAAA"
+  data   = var.whitby_ipv6
+}
+
+resource "glesys_dnsdomain_record" "nixery_dev_NS1" {
+  domain = glesys_dnsdomain.nixery_dev.id
+  host   = "@"
+  type   = "NS"
+  data   = "ns1.namesystem.se."
+}
+
+resource "glesys_dnsdomain_record" "nixery_dev_NS2" {
+  domain = glesys_dnsdomain.nixery_dev.id
+  host   = "@"
+  type   = "NS"
+  data   = "ns2.namesystem.se."
+}
+
+resource "glesys_dnsdomain_record" "nixery_dev_NS3" {
+  domain = glesys_dnsdomain.nixery_dev.id
+  host   = "@"
+  type   = "NS"
+  data   = "ns3.namesystem.se."
+}
diff --git a/ops/glesys/dns-tvl-fyi.tf b/ops/glesys/dns-tvl-fyi.tf
new file mode 100644
index 000000000000..803bfeae08ba
--- /dev/null
+++ b/ops/glesys/dns-tvl-fyi.tf
@@ -0,0 +1,99 @@
+# DNS configuration for tvl.fyi
+
+resource "glesys_dnsdomain" "tvl_fyi" {
+  name = "tvl.fyi"
+}
+
+resource "glesys_dnsdomain_record" "tvl_fyi_NS1" {
+  domain = glesys_dnsdomain.tvl_fyi.id
+  host   = "@"
+  type   = "NS"
+  data   = "ns1.namesystem.se."
+}
+
+resource "glesys_dnsdomain_record" "tvl_fyi_NS2" {
+  domain = glesys_dnsdomain.tvl_fyi.id
+  host   = "@"
+  type   = "NS"
+  data   = "ns2.namesystem.se."
+}
+
+resource "glesys_dnsdomain_record" "tvl_fyi_NS3" {
+  domain = glesys_dnsdomain.tvl_fyi.id
+  host   = "@"
+  type   = "NS"
+  data   = "ns3.namesystem.se."
+}
+
+resource "glesys_dnsdomain_record" "tvl_fyi_apex_A" {
+  domain = glesys_dnsdomain.tvl_fyi.id
+  host   = "@"
+  type   = "A"
+  data   = var.whitby_ipv4
+}
+
+resource "glesys_dnsdomain_record" "tvl_fyi_apex_AAAA" {
+  domain = glesys_dnsdomain.tvl_fyi.id
+  host   = "@"
+  type   = "AAAA"
+  data   = var.whitby_ipv6
+}
+
+resource "glesys_dnsdomain_record" "tvl_fyi_whitby_A" {
+  domain = glesys_dnsdomain.tvl_fyi.id
+  host   = "whitby"
+  type   = "A"
+  data   = var.whitby_ipv4
+}
+
+resource "glesys_dnsdomain_record" "tvl_fyi_whitby_AAAA" {
+  domain = glesys_dnsdomain.tvl_fyi.id
+  host   = "whitby"
+  type   = "AAAA"
+  data   = var.whitby_ipv6
+}
+
+# This record is responsible for hosting ~all TVL services. Be
+# mindful!
+resource "glesys_dnsdomain_record" "tvl_fyi_wildcard" {
+  domain = glesys_dnsdomain.tvl_fyi.id
+  host   = "*"
+  type   = "CNAME"
+  data   = "whitby.tvl.fyi."
+}
+
+# Google Domains mail forwarding configuration (no sending)
+resource "glesys_dnsdomain_record" "tvl_fyi_MX_5" {
+  domain = glesys_dnsdomain.tvl_fyi.id
+  host   = "@"
+  type   = "MX"
+  data   = "5 gmr-smtp-in.l.google.com."
+}
+
+resource "glesys_dnsdomain_record" "tvl_fyi_MX_10" {
+  domain = glesys_dnsdomain.tvl_fyi.id
+  host   = "@"
+  type   = "MX"
+  data   = "10 alt1.gmr-smtp-in.l.google.com."
+}
+
+resource "glesys_dnsdomain_record" "tvl_fyi_MX_20" {
+  domain = glesys_dnsdomain.tvl_fyi.id
+  host   = "@"
+  type   = "MX"
+  data   = "20 alt2.gmr-smtp-in.l.google.com."
+}
+
+resource "glesys_dnsdomain_record" "tvl_fyi_MX_30" {
+  domain = glesys_dnsdomain.tvl_fyi.id
+  host   = "@"
+  type   = "MX"
+  data   = "30 alt3.aspmx.l.google.com."
+}
+
+resource "glesys_dnsdomain_record" "tvl_fyi_MX_40" {
+  domain = glesys_dnsdomain.tvl_fyi.id
+  host   = "@"
+  type   = "MX"
+  data   = "40 alt4.gmr-smtp-in.l.google.com."
+}
diff --git a/ops/glesys/dns-tvl-su.tf b/ops/glesys/dns-tvl-su.tf
new file mode 100644
index 000000000000..39fd054e01dd
--- /dev/null
+++ b/ops/glesys/dns-tvl-su.tf
@@ -0,0 +1,122 @@
+# DNS configuration for tvl.su
+
+resource "glesys_dnsdomain" "tvl_su" {
+  name = "tvl.su"
+}
+
+resource "glesys_dnsdomain_record" "tvl_su_NS1" {
+  domain = glesys_dnsdomain.tvl_su.id
+  host   = "@"
+  type   = "NS"
+  data   = "ns1.namesystem.se."
+}
+
+resource "glesys_dnsdomain_record" "tvl_su_NS2" {
+  domain = glesys_dnsdomain.tvl_su.id
+  host   = "@"
+  type   = "NS"
+  data   = "ns2.namesystem.se."
+}
+
+resource "glesys_dnsdomain_record" "tvl_su_NS3" {
+  domain = glesys_dnsdomain.tvl_su.id
+  host   = "@"
+  type   = "NS"
+  data   = "ns3.namesystem.se."
+}
+
+resource "glesys_dnsdomain_record" "tvl_su_apex_A" {
+  domain = glesys_dnsdomain.tvl_su.id
+  host   = "@"
+  type   = "A"
+  data   = var.whitby_ipv4
+}
+
+resource "glesys_dnsdomain_record" "tvl_su_apex_AAAA" {
+  domain = glesys_dnsdomain.tvl_su.id
+  host   = "@"
+  type   = "AAAA"
+  data   = var.whitby_ipv6
+}
+
+resource "glesys_dnsdomain_record" "tvl_su_whitby_A" {
+  domain = glesys_dnsdomain.tvl_su.id
+  host   = "whitby"
+  type   = "A"
+  data   = var.whitby_ipv4
+}
+
+resource "glesys_dnsdomain_record" "tvl_su_whitby_AAAA" {
+  domain = glesys_dnsdomain.tvl_su.id
+  host   = "whitby"
+  type   = "AAAA"
+  data   = var.whitby_ipv6
+}
+
+resource "glesys_dnsdomain_record" "tvl_su_sanduny_A" {
+  domain = glesys_dnsdomain.tvl_su.id
+  host   = "sanduny"
+  type   = "A"
+  data   = var.sanduny_ipv4
+}
+
+resource "glesys_dnsdomain_record" "tvl_su_sanduny_AAAA" {
+  domain = glesys_dnsdomain.tvl_su.id
+  host   = "sanduny"
+  type   = "AAAA"
+  data   = var.sanduny_ipv6
+}
+
+# This record is responsible for hosting ~all TVL services. Be
+# mindful!
+resource "glesys_dnsdomain_record" "tvl_su_wildcard" {
+  domain = glesys_dnsdomain.tvl_su.id
+  host   = "*"
+  type   = "CNAME"
+  data   = "whitby.tvl.su."
+}
+
+resource "glesys_dnsdomain_record" "tvl_su_TXT_google_site" {
+  domain = glesys_dnsdomain.tvl_su.id
+  host   = "@"
+  type   = "TXT"
+  data   = "google-site-verification=3ksTBzFK3lZlzD3ddBfpaHs9qasfAiYBmvbW2T_ejH4"
+}
+
+# Yandex 360 setup
+
+resource "glesys_dnsdomain_record" "tvl_su_TXT_yandex" {
+  domain = glesys_dnsdomain.tvl_su.id
+  host   = "@"
+  type   = "TXT"
+  data   = "yandex-verification: b99c43b7838949dc"
+}
+
+resource "glesys_dnsdomain_record" "tvl_su_MX_yandex" {
+  domain = glesys_dnsdomain.tvl_su.id
+  host   = "@"
+  type   = "MX"
+  data   = "10 mx.yandex.net."
+}
+
+resource "glesys_dnsdomain_record" "tvl_su_TXT_yandex_spf" {
+  domain = glesys_dnsdomain.tvl_su.id
+  host   = "@"
+  type   = "TXT"
+  data   = "v=spf1 redirect=_spf.yandex.net"
+
+}
+
+resource "glesys_dnsdomain_record" "tvl_su_TXT_yandex_dkim" {
+  domain = glesys_dnsdomain.tvl_su.id
+  host   = "mail._domainkey"
+  type   = "TXT"
+  data   = "v=DKIM1; k=rsa; t=s; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDaRdWF8BtCHlTTQN8O+E5Qn27FVIpUEAdk1uq2vdIKh1Un/3NfdWtxStcS1Mf0iEprt1Fb4zgWOkDlPi+hH/UZqiC9QNeNqEBGMB9kgJyfsUt6cDCIVGvn8PT9JcZW1jxSziOj8nUWB4noqbaVcQNqNbwtaHPm3aifwKwScxVO7wIDAQAB"
+}
+
+resource "glesys_dnsdomain_record" "tvl_su_CNAME_yandex_mail" {
+  domain = glesys_dnsdomain.tvl_su.id
+  host   = "mail"
+  type   = "CNAME"
+  data   = "domain.mail.yandex.net."
+}
diff --git a/ops/glesys/main.tf b/ops/glesys/main.tf
new file mode 100644
index 000000000000..9032d501a518
--- /dev/null
+++ b/ops/glesys/main.tf
@@ -0,0 +1,72 @@
+# Configure TVL resources hosted with GleSYS.
+#
+# Most importantly:
+#  - all of our DNS
+#  - object storage (e.g. backups)
+
+terraform {
+  required_providers {
+    glesys = {
+      source = "depot/glesys"
+    }
+  }
+
+  backend "s3" {
+    endpoint = "https://objects.dc-sto1.glesys.net"
+    bucket   = "tvl-state"
+    key      = "terraform/tvl-glesys"
+    region   = "glesys"
+
+    skip_credentials_validation = true
+    skip_region_validation      = true
+    skip_metadata_api_check     = true
+  }
+}
+
+provider "glesys" {
+  userid = "cl26117" # generated by GleSYS
+}
+
+resource "glesys_objectstorage_instance" "tvl-backups" {
+  description = "tvl-backups"
+  datacenter  = "dc-sto1"
+}
+
+resource "glesys_objectstorage_instance" "tvl-state" {
+  description = "tvl-state"
+  datacenter  = "dc-sto1"
+
+  lifecycle {
+    ignore_changes = [accesskey]
+  }
+}
+
+resource "glesys_objectstorage_credential" "terraform-state" {
+  instanceid  = glesys_objectstorage_instance.tvl-state.id
+  description = "key for terraform state"
+}
+
+resource "glesys_objectstorage_credential" "litestream" {
+  instanceid  = glesys_objectstorage_instance.tvl-state.id
+  description = "key for litestream"
+}
+
+variable "whitby_ipv4" {
+  type    = string
+  default = "49.12.129.211"
+}
+
+variable "whitby_ipv6" {
+  type    = string
+  default = "2a01:4f8:242:5b21:0:feed:edef:beef"
+}
+
+variable "sanduny_ipv4" {
+  type    = string
+  default = "85.119.82.231"
+}
+
+variable "sanduny_ipv6" {
+  type    = string
+  default = "2001:ba8:1f1:f109::feed:edef:beef"
+}
diff --git a/ops/journaldriver/.gitignore b/ops/journaldriver/.gitignore
new file mode 100644
index 000000000000..29e65519ba35
--- /dev/null
+++ b/ops/journaldriver/.gitignore
@@ -0,0 +1,3 @@
+result
+/target
+**/*.rs.bk
diff --git a/ops/journaldriver/Cargo.lock b/ops/journaldriver/Cargo.lock
new file mode 100644
index 000000000000..0b7afd993291
--- /dev/null
+++ b/ops/journaldriver/Cargo.lock
@@ -0,0 +1,511 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "aho-corasick"
+version = "0.7.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1e37cfd5e7657ada45f742d6e99ca5788580b5c529dc78faf11ece6dc702656f"
+dependencies = [
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diff --git a/ops/journaldriver/Cargo.toml b/ops/journaldriver/Cargo.toml
new file mode 100644
index 000000000000..4c32b893f77d
--- /dev/null
+++ b/ops/journaldriver/Cargo.toml
@@ -0,0 +1,22 @@
+[package]
+name = "journaldriver"
+version = "1.1.0"
+authors = ["Vincent Ambo <mail@tazj.in>"]
+license = "GPL-3.0-or-later"
+edition = "2021"
+
+[dependencies]
+anyhow = "1.0"
+crimp = "0.2"
+env_logger = "0.5"
+lazy_static = "1.0"
+log = "0.4"
+medallion = "2.5"
+serde = "1.0"
+serde_derive = "1.0"
+serde_json = "1.0"
+systemd = "0.3"
+time = { version = "0.3", features = [ "serde-well-known", "macros" ]}
+
+[build-dependencies]
+pkg-config = "0.3"
diff --git a/ops/journaldriver/README.md b/ops/journaldriver/README.md
new file mode 100644
index 000000000000..4dc9de0f617b
--- /dev/null
+++ b/ops/journaldriver/README.md
@@ -0,0 +1,152 @@
+journaldriver
+=============
+
+This is a small daemon used to forward logs from `journald` (systemd's
+logging service) to [Stackdriver Logging][].
+
+Many existing log services are written in inefficient dynamic
+languages with error-prone "cover every possible use-case"
+configuration. `journaldriver` instead aims to fit a specific use-case
+very well, instead of covering every possible logging setup.
+
+`journaldriver` can be run on GCP-instances with no additional
+configuration as authentication tokens are retrieved from the
+[metadata server][].
+
+<!-- markdown-toc start - Don't edit this section. Run M-x markdown-toc-refresh-toc -->
+**Table of Contents**
+
+- [Features](#features)
+- [Usage on Google Cloud Platform](#usage-on-google-cloud-platform)
+- [Usage outside of Google Cloud Platform](#usage-outside-of-google-cloud-platform)
+- [Log levels / severities / priorities](#log-levels--severities--priorities)
+- [NixOS module](#nixos-module)
+- [Stackdriver Error Reporting](#stackdriver-error-reporting)
+
+<!-- markdown-toc end -->
+
+# Features
+
+* `journaldriver` persists the last forwarded position in the journal
+  and will resume forwarding at the same position after a restart
+* `journaldriver` will recognise log entries in JSON format and
+  forward them appropriately to make structured log entries available
+  in Stackdriver
+* `journaldriver` can be used outside of GCP by configuring static
+  credentials
+* `journaldriver` will recognise journald's log priority levels and
+  convert them into equivalent Stackdriver log severity levels
+
+# Usage on Google Cloud Platform
+
+`journaldriver` does not require any configuration when running on GCP
+instances.
+
+1. Install `journaldriver` on the instance from which you wish to
+   forward logs.
+
+2. Ensure that the instance has the appropriate permissions to write
+   to Stackdriver. Google continously changes how IAM is implemented
+   on GCP, so you will have to refer to [Google's documentation][].
+
+   By default instances have the required permissions if Stackdriver
+   Logging support is enabled in the project.
+
+3. Start `journaldriver`, for example via `systemd`.
+
+# Usage outside of Google Cloud Platform
+
+When running outside of GCP, the following extra steps need to be
+performed:
+
+1. Create a Google Cloud Platform service account with the "Log
+   Writer" role and download its private key in JSON-format.
+2. When starting `journaldriver`, configure the following environment
+   variables:
+
+   * `GOOGLE_CLOUD_PROJECT`: Name of the GCP project to which logs
+     should be written.
+   * `GOOGLE_APPLICATION_CREDENTIALS`: Filesystem path to the
+     JSON-file containing the service account's private key.
+   * `LOG_STREAM`: Name of the target log stream in Stackdriver Logging.
+     This will be automatically created if it does not yet exist.
+   * `LOG_NAME`: Name of the target log to write to. This defaults to
+     `journaldriver` if unset, but it is recommended to - for
+     example - set it to the machine hostname.
+
+# Log levels / severities / priorities
+
+`journaldriver` recognises [journald's priorities][] and converts them
+into [equivalent severities][] in Stackdriver. Both sets of values
+correspond to standard `syslog` priorities.
+
+The easiest way to emit log messages with priorites from an
+application is to use [priority prefixes][], which are compatible with
+structured log messages.
+
+For example, to emit a simple warning message (structured and
+unstructured):
+
+```
+$ echo '<4>{"fnord":true, "msg":"structured log (warning)"}' | systemd-cat
+$ echo '<4>unstructured log (warning)' | systemd-cat
+```
+
+# NixOS module
+
+The NixOS package repository [contains a module][] for setting up
+`journaldriver` on NixOS machines. NixOS by default uses `systemd` for
+service management and `journald` for logging, which means that log
+output from most services will be captured automatically.
+
+On a GCP instance the only required option is this:
+
+```nix
+services.journaldriver.enable = true;
+```
+
+When running outside of GCP, the configuration looks as follows:
+
+```nix
+services.journaldriver = {
+  enable                 = true;
+  logStream              = "prod-environment";
+  logName                = "hostname";
+  googleCloudProject     = "gcp-project-name";
+  applicationCredentials = keyFile;
+};
+```
+
+**Note**: The `journaldriver`-module is included in stable releases of
+NixOS since NixOS 18.09.
+
+# Stackdriver Error Reporting
+
+The [Stackdriver Error Reporting][] service of Google's monitoring
+toolbox supports automatically detecting and correlating errors from
+log entries.
+
+To use this functionality log messages must be logged in the expected
+[log format][].
+
+*Note*: Reporting errors from non-GCP instances requires that the
+`LOG_STREAM` environment variable is set to the special value
+`global`.
+
+This value changes the monitored resource descriptor from a log stream
+to the project-global stream. Due to a limitation in Stackdriver Error
+Reporting, this is the only way to correctly ingest errors from
+non-GCP machines. Please see [issue #4][] for more information about
+this.
+
+[Stackdriver Logging]: https://cloud.google.com/logging/
+[metadata server]: https://cloud.google.com/compute/docs/storing-retrieving-metadata
+[Google's documentation]: https://cloud.google.com/logging/docs/access-control
+[NixOS]: https://nixos.org/
+[contains a module]: https://github.com/NixOS/nixpkgs/pull/42134
+[journald's priorities]: http://0pointer.de/public/systemd-man/sd-daemon.html
+[equivalent severities]: https://cloud.google.com/logging/docs/reference/v2/rest/v2/LogEntry#logseverity
+[priority prefixes]: http://0pointer.de/public/systemd-man/sd-daemon.html
+[Stackdriver Error Reporting]: https://cloud.google.com/error-reporting/
+[log format]: https://cloud.google.com/error-reporting/docs/formatting-error-messages
+[issue #4]: https://github.com/tazjin/journaldriver/issues/4
diff --git a/ops/journaldriver/build.rs b/ops/journaldriver/build.rs
new file mode 100644
index 000000000000..79eb1001bf09
--- /dev/null
+++ b/ops/journaldriver/build.rs
@@ -0,0 +1,5 @@
+extern crate pkg_config;
+
+fn main() {
+    pkg_config::probe_library("libsystemd").expect("Could not probe libsystemd");
+}
diff --git a/ops/journaldriver/default.nix b/ops/journaldriver/default.nix
new file mode 100644
index 000000000000..a06a858fa12a
--- /dev/null
+++ b/ops/journaldriver/default.nix
@@ -0,0 +1,11 @@
+{ depot, pkgs, ... }:
+
+depot.third_party.naersk.buildPackage {
+  src = ./.;
+
+  buildInputs = with pkgs; [
+    pkgconfig
+    openssl
+    systemd.dev
+  ];
+}
diff --git a/ops/journaldriver/src/main.rs b/ops/journaldriver/src/main.rs
new file mode 100644
index 000000000000..4c404e607e5b
--- /dev/null
+++ b/ops/journaldriver/src/main.rs
@@ -0,0 +1,638 @@
+// Copyright (C) 2018 Vincent Ambo <mail@tazj.in>
+//
+// journaldriver is free software: you can redistribute it and/or
+// modify it under the terms of the GNU General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+//! This file implements journaldriver, a small application that
+//! forwards logs from journald (systemd's log facility) to
+//! Stackdriver Logging.
+//!
+//! Log entries are read continously from journald and are forwarded
+//! to Stackdriver in batches.
+//!
+//! Stackdriver Logging has a concept of monitored resources. In the
+//! simplest case this monitored resource will be the GCE instance on
+//! which journaldriver is running.
+//!
+//! Information about the instance, the project and required security
+//! credentials are retrieved from Google's metadata instance on GCP.
+//!
+//! To run journaldriver on non-GCP machines, users must specify the
+//! `GOOGLE_APPLICATION_CREDENTIALS`, `GOOGLE_CLOUD_PROJECT` and
+//! `LOG_NAME` environment variables.
+
+use anyhow::{bail, Context, Result};
+use lazy_static::lazy_static;
+use log::{debug, error, info, trace};
+use serde::{Deserialize, Serialize};
+use serde_json::{from_str, json, Value};
+use std::convert::TryInto;
+use std::fs::{self, rename, File};
+use std::io::{self, ErrorKind, Read, Write};
+use std::path::PathBuf;
+use std::time::{Duration, Instant};
+use std::{env, mem, process};
+use systemd::journal::{Journal, JournalFiles, JournalRecord, JournalSeek};
+
+#[cfg(test)]
+mod tests;
+
+const LOGGING_SERVICE: &str = "https://logging.googleapis.com/google.logging.v2.LoggingServiceV2";
+const ENTRIES_WRITE_URL: &str = "https://logging.googleapis.com/v2/entries:write";
+const METADATA_TOKEN_URL: &str =
+    "http://metadata.google.internal/computeMetadata/v1/instance/service-accounts/default/token";
+const METADATA_ID_URL: &str = "http://metadata.google.internal/computeMetadata/v1/instance/id";
+const METADATA_ZONE_URL: &str = "http://metadata.google.internal/computeMetadata/v1/instance/zone";
+const METADATA_PROJECT_URL: &str =
+    "http://metadata.google.internal/computeMetadata/v1/project/project-id";
+
+/// Representation of static service account credentials for GCP.
+#[derive(Debug, Deserialize)]
+struct Credentials {
+    /// PEM encoded private key
+    private_key: String,
+
+    /// `kid` of this private key
+    private_key_id: String,
+
+    /// "email" address of the service account
+    client_email: String,
+}
+
+lazy_static! {
+    /// ID of the GCP project to which to send logs.
+    static ref PROJECT_ID: String = get_project_id();
+
+    /// Name of the log to write to (this should only be manually
+    /// configured if not running on GCP):
+    static ref LOG_NAME: String = env::var("LOG_NAME")
+        .unwrap_or("journaldriver".into());
+
+    /// Service account credentials (if configured)
+    static ref SERVICE_ACCOUNT_CREDENTIALS: Option<Credentials> =
+        env::var("GOOGLE_APPLICATION_CREDENTIALS").ok()
+        .and_then(|path| File::open(path).ok())
+        .and_then(|file| serde_json::from_reader(file).ok());
+
+    /// Descriptor of the currently monitored instance. Refer to the
+    /// documentation of `determine_monitored_resource` for more
+    /// information.
+    static ref MONITORED_RESOURCE: Value = determine_monitored_resource();
+
+    /// Path to the directory in which journaldriver should persist
+    /// its cursor state.
+    static ref CURSOR_DIR: PathBuf = env::var("CURSOR_POSITION_DIR")
+        .unwrap_or("/var/lib/journaldriver".into())
+        .into();
+
+    /// Path to the cursor position file itself.
+    static ref CURSOR_FILE: PathBuf = {
+        let mut path = CURSOR_DIR.clone();
+        path.push("cursor.pos");
+        path
+    };
+
+    /// Path to the temporary file used for cursor position writes.
+    static ref CURSOR_TMP_FILE: PathBuf = {
+        let mut path = CURSOR_DIR.clone();
+        path.push("cursor.tmp");
+        path
+    };
+}
+
+/// Convenience helper for retrieving values from the metadata server.
+fn get_metadata(url: &str) -> Result<String> {
+    let response = crimp::Request::get(url)
+        .header("Metadata-Flavor", "Google")?
+        .timeout(std::time::Duration::from_secs(5))?
+        .send()?
+        .as_string()?;
+
+    if !response.is_success() {
+        bail!(
+            "Error response ({}) from metadata server: {}",
+            response.status,
+            response.body
+        );
+    }
+
+    Ok(response.body.trim().to_owned())
+}
+
+/// Convenience helper for determining the project ID.
+fn get_project_id() -> String {
+    env::var("GOOGLE_CLOUD_PROJECT")
+        .or_else(|_| get_metadata(METADATA_PROJECT_URL))
+        .expect("Could not determine project ID")
+}
+
+/// Determines the monitored resource descriptor used in Stackdriver
+/// logs. On GCP this will be set to the instance ID as returned by
+/// the metadata server.
+///
+/// On non-GCP machines the value is determined by using the
+/// `GOOGLE_CLOUD_PROJECT` and `LOG_STREAM` environment variables.
+///
+/// [issue #4]: https://github.com/tazjin/journaldriver/issues/4
+fn determine_monitored_resource() -> Value {
+    if let Ok(log) = env::var("LOG_STREAM") {
+        // The special value `global` is recognised as a log stream name that
+        // results in a `global`-type resource descriptor. This is useful in
+        // cases where Stackdriver Error Reporting is intended to be used on
+        // a non-GCE instance. See [issue #4][] for details.
+        if log == "global" {
+            return json!({
+                "type": "global",
+                "labels": {
+                    "project_id": PROJECT_ID.as_str(),
+                }
+            });
+        }
+
+        json!({
+            "type": "logging_log",
+            "labels": {
+                "project_id": PROJECT_ID.as_str(),
+                "name": log,
+            }
+        })
+    } else {
+        let instance_id = get_metadata(METADATA_ID_URL).expect("Could not determine instance ID");
+
+        let zone = get_metadata(METADATA_ZONE_URL).expect("Could not determine instance zone");
+
+        json!({
+            "type": "gce_instance",
+            "labels": {
+                "project_id": PROJECT_ID.as_str(),
+                "instance_id": instance_id,
+                "zone": zone,
+            }
+        })
+    }
+}
+
+/// Represents the response returned by the metadata server's token
+/// endpoint. The token is normally valid for an hour.
+#[derive(Deserialize)]
+struct TokenResponse {
+    expires_in: u64,
+    access_token: String,
+}
+
+/// Struct used to store a token together with a sensible
+/// representation of when it expires.
+struct Token {
+    token: String,
+    fetched_at: Instant,
+    expires: Duration,
+}
+
+impl Token {
+    /// Does this token need to be renewed?
+    fn is_expired(&self) -> bool {
+        self.fetched_at.elapsed() > self.expires
+    }
+}
+
+/// Retrieves a token from the GCP metadata service. Retrieving these
+/// tokens requires no additional authentication.
+fn get_metadata_token() -> Result<Token> {
+    let body = get_metadata(METADATA_TOKEN_URL)?;
+    let token: TokenResponse = from_str(&body)?;
+
+    debug!("Fetched new token from metadata service");
+
+    Ok(Token {
+        fetched_at: Instant::now(),
+        expires: Duration::from_secs(token.expires_in / 2),
+        token: token.access_token,
+    })
+}
+
+/// Signs a token using static client credentials configured for a
+/// service account. This service account must have been given the
+/// `Log Writer` role in Google Cloud IAM.
+///
+/// The process for creating and signing these tokens is described
+/// here:
+///
+/// https://developers.google.com/identity/protocols/OAuth2ServiceAccount#jwt-auth
+fn sign_service_account_token(credentials: &Credentials) -> Result<Token> {
+    use medallion::{Algorithm, Header, Payload};
+
+    let iat = time::OffsetDateTime::now_utc();
+    let exp = iat + time::Duration::seconds(3600);
+
+    let header = Header {
+        alg: Algorithm::RS256,
+        headers: Some(json!({
+            "kid": credentials.private_key_id,
+        })),
+    };
+
+    let payload: Payload<()> = Payload {
+        iss: Some(credentials.client_email.clone()),
+        sub: Some(credentials.client_email.clone()),
+        aud: Some(LOGGING_SERVICE.to_string()),
+        iat: Some(iat.unix_timestamp().try_into().unwrap()),
+        exp: Some(exp.unix_timestamp().try_into().unwrap()),
+        ..Default::default()
+    };
+
+    let token = medallion::Token::new(header, payload)
+        .sign(credentials.private_key.as_bytes())
+        .context("Signing service account token failed")?;
+
+    debug!("Signed new service account token");
+
+    Ok(Token {
+        token,
+        fetched_at: Instant::now(),
+        expires: Duration::from_secs(3000),
+    })
+}
+
+/// Retrieve the authentication token either by using static client
+/// credentials, or by talking to the metadata server.
+///
+/// Which behaviour is used is controlled by the environment variable
+/// `GOOGLE_APPLICATION_CREDENTIALS`, which should be configured to
+/// point at a JSON private key file if service account authentication
+/// is to be used.
+fn get_token() -> Result<Token> {
+    if let Some(credentials) = SERVICE_ACCOUNT_CREDENTIALS.as_ref() {
+        sign_service_account_token(credentials)
+    } else {
+        get_metadata_token()
+    }
+}
+
+/// This structure represents the different types of payloads
+/// supported by journaldriver.
+///
+/// Currently log entries can either contain plain text messages or
+/// structured payloads in JSON-format.
+#[derive(Debug, Serialize, PartialEq)]
+#[serde(untagged)]
+enum Payload {
+    TextPayload {
+        #[serde(rename = "textPayload")]
+        text_payload: String,
+    },
+    JsonPayload {
+        #[serde(rename = "jsonPayload")]
+        json_payload: Value,
+    },
+}
+
+/// Attempt to parse a log message as JSON and return it as a
+/// structured payload. If parsing fails, return the entry in plain
+/// text format.
+fn message_to_payload(message: Option<String>) -> Payload {
+    match message {
+        None => Payload::TextPayload {
+            text_payload: "empty log entry".into(),
+        },
+        Some(text_payload) => {
+            // Attempt to deserialize the text payload as a generic
+            // JSON value.
+            if let Ok(json_payload) = serde_json::from_str::<Value>(&text_payload) {
+                // If JSON-parsing succeeded on the payload, check
+                // whether we parsed an object (Stackdriver does not
+                // expect other types of JSON payload) and return it
+                // in that case.
+                if json_payload.is_object() {
+                    return Payload::JsonPayload { json_payload };
+                }
+            }
+
+            Payload::TextPayload { text_payload }
+        }
+    }
+}
+
+/// Attempt to parse journald's microsecond timestamps into a UTC
+/// timestamp.
+///
+/// Parse errors are dismissed and returned as empty options: There
+/// simply aren't any useful fallback mechanisms other than defaulting
+/// to ingestion time for journaldriver's use-case.
+fn parse_microseconds(input: String) -> Option<time::OffsetDateTime> {
+    if input.len() != 16 {
+        return None;
+    }
+
+    let micros: i128 = input.parse().ok()?;
+    let nanos: i128 = micros * 1000;
+
+    time::OffsetDateTime::from_unix_timestamp_nanos(nanos).ok()
+}
+
+/// Converts a journald log message priority to a
+/// Stackdriver-compatible severity number.
+///
+/// Both Stackdriver and journald specify equivalent
+/// severities/priorities. Conveniently, the names are the same.
+/// Inconveniently, the numbers are not.
+///
+/// For more information on the journald priorities, consult these
+/// man-pages:
+///
+/// * systemd.journal-fields(7) (section 'PRIORITY')
+/// * sd-daemon(3)
+/// * systemd.exec(5) (section 'SyslogLevelPrefix')
+///
+/// Note that priorities can be logged by applications via the prefix
+/// concept described in these man pages, without interfering with
+/// structured JSON-payloads.
+///
+/// For more information on the Stackdriver severity levels, please
+/// consult Google's documentation:
+///
+/// https://cloud.google.com/logging/docs/reference/v2/rest/v2/LogEntry#LogSeverity
+///
+/// Any unknown priority values result in no severity being set.
+fn priority_to_severity(priority: String) -> Option<u32> {
+    match priority.as_ref() {
+        "0" => Some(800), // emerg
+        "1" => Some(700), // alert
+        "2" => Some(600), // crit
+        "3" => Some(500), // err
+        "4" => Some(400), // warning
+        "5" => Some(300), // notice
+        "6" => Some(200), // info
+        "7" => Some(100), // debug
+        _ => None,
+    }
+}
+
+/// This structure represents a log entry in the format expected by
+/// the Stackdriver API.
+#[derive(Debug, Serialize)]
+#[serde(rename_all = "camelCase")]
+struct LogEntry {
+    labels: Value,
+
+    #[serde(skip_serializing_if = "Option::is_none")]
+    #[serde(with = "time::serde::rfc3339::option")]
+    timestamp: Option<time::OffsetDateTime>,
+
+    #[serde(flatten)]
+    payload: Payload,
+
+    // https://cloud.google.com/logging/docs/reference/v2/rest/v2/LogEntry#LogSeverity
+    #[serde(skip_serializing_if = "Option::is_none")]
+    severity: Option<u32>,
+}
+
+impl From<JournalRecord> for LogEntry {
+    // Converts from the fields contained in a journald record to the
+    // representation required by Stackdriver Logging.
+    //
+    // The fields are documented in systemd.journal-fields(7).
+    fn from(mut record: JournalRecord) -> LogEntry {
+        // The message field is technically just a convention, but
+        // journald seems to default to it when ingesting unit
+        // output.
+        let payload = message_to_payload(record.remove("MESSAGE"));
+
+        // Presumably this is always set, but who can be sure
+        // about anything in this world.
+        let hostname = record.remove("_HOSTNAME");
+
+        // The unit is seemingly missing on kernel entries, but
+        // present on all others.
+        let unit = record.remove("_SYSTEMD_UNIT");
+
+        // The source timestamp (if present) is specified in
+        // microseconds since epoch.
+        //
+        // If it is not present or can not be parsed, journaldriver
+        // will not send a timestamp for the log entry and it will
+        // default to the ingestion time.
+        let timestamp = record
+            .remove("_SOURCE_REALTIME_TIMESTAMP")
+            .and_then(parse_microseconds);
+
+        // Journald uses syslogd's concept of priority. No idea if this is
+        // always present, but it's optional in the Stackdriver API, so we just
+        // omit it if we can't find or parse it.
+        let severity = record.remove("PRIORITY").and_then(priority_to_severity);
+
+        LogEntry {
+            payload,
+            timestamp,
+            labels: json!({
+                "host": hostname,
+                "unit": unit.unwrap_or_else(|| "syslog".into()),
+            }),
+            severity,
+        }
+    }
+}
+
+/// Attempt to read from the journal. If no new entry is present,
+/// await the next one up to the specified timeout.
+fn receive_next_record(timeout: Duration, journal: &mut Journal) -> Result<Option<JournalRecord>> {
+    let next_record = journal.next_record()?;
+    if next_record.is_some() {
+        return Ok(next_record);
+    }
+
+    Ok(journal.await_next_record(Some(timeout))?)
+}
+
+/// This function starts a double-looped, blocking receiver. It will
+/// buffer messages for half a second before flushing them to
+/// Stackdriver.
+fn receiver_loop(mut journal: Journal) -> Result<()> {
+    let mut token = get_token()?;
+
+    let mut buf: Vec<LogEntry> = Vec::new();
+    let iteration = Duration::from_millis(500);
+
+    loop {
+        trace!("Beginning outer iteration");
+        let now = Instant::now();
+
+        loop {
+            if now.elapsed() > iteration {
+                break;
+            }
+
+            if let Ok(Some(entry)) = receive_next_record(iteration, &mut journal) {
+                trace!("Received a new entry");
+                buf.push(entry.into());
+            }
+        }
+
+        if !buf.is_empty() {
+            let to_flush = mem::replace(&mut buf, Vec::new());
+            flush(&mut token, to_flush, journal.cursor()?)?;
+        }
+
+        trace!("Done outer iteration");
+    }
+}
+
+/// Writes the current cursor into `/var/journaldriver/cursor.pos`. To
+/// avoid issues with journaldriver being terminated while the cursor
+/// is still being written, this will first write the cursor into a
+/// temporary file and then move it.
+fn persist_cursor(cursor: String) -> Result<()> {
+    // This code exists to aid in tracking down if there are other
+    // causes of issue #2 than what has already been taken care of.
+    //
+    // One theory is that journald (or the Rust library to interface
+    // with it) may occasionally return empty cursor strings. If this
+    // is ever the case, we would like to know about it.
+    if cursor.is_empty() {
+        error!("Received empty journald cursor position, refusing to persist!");
+        error!("Please report this message at https://github.com/tazjin/journaldriver/issues/2");
+        return Ok(());
+    }
+
+    let mut file = File::create(&*CURSOR_TMP_FILE).context("Failed to create cursor file")?;
+
+    write!(file, "{}", cursor).context("Failed to write cursor file")?;
+
+    rename(&*CURSOR_TMP_FILE, &*CURSOR_FILE)
+        .context("Failed to move cursor file")
+        .map_err(Into::into)
+}
+
+/// Flushes all drained records to Stackdriver. Any Stackdriver
+/// message can at most contain 1000 log entries which means they are
+/// chunked up here.
+///
+/// In some cases large payloads seem to cause errors in Stackdriver -
+/// the chunks are therefore made smaller here.
+///
+/// If flushing is successful the last cursor position will be
+/// persisted to disk.
+fn flush(token: &mut Token, entries: Vec<LogEntry>, cursor: String) -> Result<()> {
+    if token.is_expired() {
+        debug!("Refreshing Google metadata access token");
+        let new_token = get_token()?;
+        *token = new_token;
+    }
+
+    for chunk in entries.chunks(750) {
+        let request = prepare_request(chunk);
+        if let Err(write_error) = write_entries(token, request) {
+            error!("Failed to write {} entries: {}", chunk.len(), write_error)
+        } else {
+            debug!("Wrote {} entries to Stackdriver", chunk.len())
+        }
+    }
+
+    persist_cursor(cursor)
+}
+
+/// Convert a slice of log entries into the format expected by
+/// Stackdriver. This format is documented here:
+///
+/// https://cloud.google.com/logging/docs/reference/v2/rest/v2/entries/write
+fn prepare_request(entries: &[LogEntry]) -> Value {
+    json!({
+        "logName": format!("projects/{}/logs/{}", PROJECT_ID.as_str(), LOG_NAME.as_str()),
+        "resource": &*MONITORED_RESOURCE,
+        "entries": entries,
+        "partialSuccess": true
+    })
+}
+
+/// Perform the log entry insertion in Stackdriver Logging.
+fn write_entries(token: &Token, request: Value) -> Result<()> {
+    let response = crimp::Request::post(ENTRIES_WRITE_URL)
+        .json(&request)?
+        .header("Authorization", format!("Bearer {}", token.token).as_str())?
+        // The timeout values are set relatively high, not because of
+        // an expectation of Stackdriver being slow but just to
+        // eventually force an error in case of network troubles.
+        // Presumably no request in a functioning environment will
+        // ever hit these limits.
+        .timeout(std::time::Duration::from_secs(5))?
+        .send()?;
+
+    if !response.is_success() {
+        let status = response.status;
+        let body = response
+            .as_string()
+            .map(|r| r.body)
+            .unwrap_or_else(|_| "no valid response body".to_owned());
+
+        bail!("Writing to Stackdriver failed({}): {}", status, body);
+    }
+
+    Ok(())
+}
+
+/// Attempt to read the initial cursor position from the configured
+/// file. If there is no initial cursor position set, read from the
+/// tail of the log.
+///
+/// The only "acceptable" error when reading the cursor position is
+/// the cursor position file not existing, other errors are fatal
+/// because they indicate a misconfiguration of journaldriver.
+fn initial_cursor() -> Result<JournalSeek> {
+    let read_result: io::Result<String> = (|| {
+        let mut contents = String::new();
+        let mut file = File::open(&*CURSOR_FILE)?;
+        file.read_to_string(&mut contents)?;
+        Ok(contents.trim().into())
+    })();
+
+    match read_result {
+        Ok(cursor) => Ok(JournalSeek::Cursor { cursor }),
+        Err(ref err) if err.kind() == ErrorKind::NotFound => {
+            info!("No previous cursor position, reading from journal tail");
+            Ok(JournalSeek::Tail)
+        }
+        Err(err) => (Err(err).context("Could not read cursor position"))?,
+    }
+}
+
+fn main() {
+    env_logger::init();
+
+    // The directory in which cursor positions are persisted should
+    // have been created:
+    if !CURSOR_DIR.exists() {
+        error!("Cursor directory at '{:?}' does not exist", *CURSOR_DIR);
+        process::exit(1);
+    }
+
+    let cursor_position_dir = CURSOR_FILE
+        .parent()
+        .expect("Invalid cursor position file path");
+
+    fs::create_dir_all(cursor_position_dir)
+        .expect("Could not create directory to store cursor position in");
+
+    let mut journal =
+        Journal::open(JournalFiles::All, false, true).expect("Failed to open systemd journal");
+
+    let seek_position = initial_cursor().expect("Failed to determine initial cursor position");
+
+    match journal.seek(seek_position) {
+        Ok(cursor) => info!("Opened journal at cursor '{}'", cursor),
+        Err(err) => {
+            error!("Failed to set initial journal position: {}", err);
+            process::exit(1)
+        }
+    }
+
+    receiver_loop(journal).expect("log receiver encountered an unexpected error");
+}
diff --git a/ops/journaldriver/src/tests.rs b/ops/journaldriver/src/tests.rs
new file mode 100644
index 000000000000..6f5045d6a5cd
--- /dev/null
+++ b/ops/journaldriver/src/tests.rs
@@ -0,0 +1,131 @@
+use super::*;
+use serde_json::to_string;
+use time::macros::datetime;
+
+#[test]
+fn test_text_entry_serialization() {
+    let entry = LogEntry {
+        labels: Value::Null,
+        timestamp: None,
+        payload: Payload::TextPayload {
+            text_payload: "test entry".into(),
+        },
+        severity: None,
+    };
+
+    let expected = "{\"labels\":null,\"textPayload\":\"test entry\"}";
+    let result = to_string(&entry).expect("serialization failed");
+
+    assert_eq!(
+        expected, result,
+        "Plain text payload should serialize correctly"
+    )
+}
+
+#[test]
+fn test_timestamped_entry_serialization() {
+    let entry = LogEntry {
+        labels: Value::Null,
+        timestamp: Some(datetime!(1952-10-07 12:00:00 UTC)),
+        payload: Payload::TextPayload {
+            text_payload: "test entry".into(),
+        },
+        severity: None,
+    };
+
+    let expected =
+        "{\"labels\":null,\"timestamp\":\"1952-10-07T12:00:00Z\",\"textPayload\":\"test entry\"}";
+    let result = to_string(&entry).expect("serialization failed");
+
+    assert_eq!(
+        expected, result,
+        "Plain text payload should serialize correctly"
+    )
+}
+
+#[test]
+fn test_json_entry_serialization() {
+    let entry = LogEntry {
+        labels: Value::Null,
+        timestamp: None,
+        payload: Payload::JsonPayload {
+            json_payload: json!({
+                "message": "JSON test"
+            }),
+        },
+        severity: None,
+    };
+
+    let expected = "{\"labels\":null,\"jsonPayload\":{\"message\":\"JSON test\"}}";
+    let result = to_string(&entry).expect("serialization failed");
+
+    assert_eq!(expected, result, "JSON payload should serialize correctly")
+}
+
+#[test]
+fn test_plain_text_payload() {
+    let message = "plain text payload".into();
+    let payload = message_to_payload(Some(message));
+    let expected = Payload::TextPayload {
+        text_payload: "plain text payload".into(),
+    };
+
+    assert_eq!(
+        expected, payload,
+        "Plain text payload should be detected correctly"
+    );
+}
+
+#[test]
+fn test_empty_payload() {
+    let payload = message_to_payload(None);
+    let expected = Payload::TextPayload {
+        text_payload: "empty log entry".into(),
+    };
+
+    assert_eq!(
+        expected, payload,
+        "Empty payload should be handled correctly"
+    );
+}
+
+#[test]
+fn test_json_payload() {
+    let message = "{\"someKey\":\"someValue\", \"otherKey\": 42}".into();
+    let payload = message_to_payload(Some(message));
+    let expected = Payload::JsonPayload {
+        json_payload: json!({
+            "someKey": "someValue",
+            "otherKey": 42
+        }),
+    };
+
+    assert_eq!(
+        expected, payload,
+        "JSON payload should be detected correctly"
+    );
+}
+
+#[test]
+fn test_json_no_object() {
+    // This message can be parsed as valid JSON, but it is not an
+    // object - it should be returned as a plain-text payload.
+    let message = "42".into();
+    let payload = message_to_payload(Some(message));
+    let expected = Payload::TextPayload {
+        text_payload: "42".into(),
+    };
+
+    assert_eq!(
+        expected, payload,
+        "Non-object JSON payload should be plain text"
+    );
+}
+
+#[test]
+fn test_parse_microseconds() {
+    let input: String = "1529175149291187".into();
+    let expected: time::OffsetDateTime = datetime!(2018-06-16 18:52:29.291187 UTC);
+
+    assert_eq!(Some(expected), parse_microseconds(input));
+}
diff --git a/ops/keycloak/.gitignore b/ops/keycloak/.gitignore
new file mode 100644
index 000000000000..017878c614d0
--- /dev/null
+++ b/ops/keycloak/.gitignore
@@ -0,0 +1,3 @@
+.terraform*
+*.tfstate*
+.envrc
diff --git a/ops/keycloak/README.md b/ops/keycloak/README.md
new file mode 100644
index 000000000000..e8ffd700b5e2
--- /dev/null
+++ b/ops/keycloak/README.md
@@ -0,0 +1,18 @@
+Terraform for Keycloak
+======================
+
+This contains the Terraform configuration for deploying TVL's Keycloak
+instance (which lives at `auth.tvl.fyi`).
+
+Secrets are needed for applying this. The encrypted file
+`//ops/secrets/tf-keycloak.age` contains `export` calls which should
+be sourced, for example via `direnv`, by users with the appropriate
+credentials.
+
+An example `direnv` configuration used by tazjin is this:
+
+```
+# //ops/secrets/.envrc
+source_up
+eval $(age --decrypt -i ~/.ssh/id_ed25519 $(git rev-parse --show-toplevel)/ops/secrets/tf-keycloak.age)
+```
diff --git a/ops/keycloak/clients.tf b/ops/keycloak/clients.tf
new file mode 100644
index 000000000000..9506bd4aa046
--- /dev/null
+++ b/ops/keycloak/clients.tf
@@ -0,0 +1,106 @@
+# All Keycloak clients, that is applications which authenticate
+# through Keycloak.
+#
+# Includes first-party (i.e. TVL-hosted) and third-party clients.
+
+resource "keycloak_openid_client" "grafana" {
+  realm_id              = keycloak_realm.tvl.id
+  client_id             = "grafana"
+  name                  = "Grafana"
+  enabled               = true
+  access_type           = "CONFIDENTIAL"
+  standard_flow_enabled = true
+  base_url              = "https://status.tvl.su"
+
+  valid_redirect_uris = [
+    "https://status.tvl.su/*",
+  ]
+}
+
+resource "keycloak_openid_client" "gerrit" {
+  realm_id                                 = keycloak_realm.tvl.id
+  client_id                                = "gerrit"
+  name                                     = "TVL Gerrit"
+  enabled                                  = true
+  access_type                              = "CONFIDENTIAL"
+  standard_flow_enabled                    = true
+  base_url                                 = "https://cl.tvl.fyi"
+  description                              = "TVL's code review tool"
+  direct_access_grants_enabled             = true
+  exclude_session_state_from_auth_response = false
+
+  valid_redirect_uris = [
+    "https://cl.tvl.fyi/*",
+  ]
+
+  web_origins = [
+    "https://cl.tvl.fyi",
+  ]
+}
+
+resource "keycloak_saml_client" "buildkite" {
+  realm_id  = keycloak_realm.tvl.id
+  client_id = "https://buildkite.com"
+  name      = "Buildkite"
+  base_url  = "https://buildkite.com/sso/tvl"
+
+  client_signature_required   = false
+  assertion_consumer_post_url = "https://buildkite.com/sso/~/1531aca5-f49c-4151-8832-a451e758af4c/saml/consume"
+
+  valid_redirect_uris = [
+    "https://buildkite.com/sso/~/1531aca5-f49c-4151-8832-a451e758af4c/saml/consume"
+  ]
+}
+
+resource "keycloak_saml_user_attribute_protocol_mapper" "buildkite_email" {
+  realm_id                   = keycloak_realm.tvl.id
+  client_id                  = keycloak_saml_client.buildkite.id
+  name                       = "buildkite-email-mapper"
+  user_attribute             = "email"
+  saml_attribute_name        = "email"
+  saml_attribute_name_format = "Unspecified"
+}
+
+resource "keycloak_saml_user_attribute_protocol_mapper" "buildkite_name" {
+  realm_id                   = keycloak_realm.tvl.id
+  client_id                  = keycloak_saml_client.buildkite.id
+  name                       = "buildkite-name-mapper"
+  user_attribute             = "displayName"
+  saml_attribute_name        = "name"
+  saml_attribute_name_format = "Unspecified"
+}
+
+resource "keycloak_openid_client" "oauth2_proxy" {
+  realm_id              = keycloak_realm.tvl.id
+  client_id             = "oauth2-proxy"
+  name                  = "TVL OAuth2 Proxy"
+  enabled               = true
+  access_type           = "CONFIDENTIAL"
+  standard_flow_enabled = true
+
+  valid_redirect_uris = [
+    "https://login.tvl.fyi/oauth2/callback",
+    "http://localhost:4774/oauth2/callback",
+  ]
+}
+
+resource "keycloak_openid_audience_protocol_mapper" "oauth2_proxy_audience" {
+  realm_id                 = keycloak_realm.tvl.id
+  client_id                = keycloak_openid_client.oauth2_proxy.id
+  name                     = "oauth2-proxy-audience"
+  included_custom_audience = keycloak_openid_client.oauth2_proxy.client_id
+}
+
+resource "keycloak_openid_client" "panettone" {
+  realm_id              = keycloak_realm.tvl.id
+  client_id             = "panettone"
+  name                  = "Panettone"
+  enabled               = true
+  access_type           = "CONFIDENTIAL"
+  standard_flow_enabled = true
+
+  valid_redirect_uris = [
+    "https://b.tvl.fyi/auth",
+    "http://localhost:6161/auth",
+  ]
+}
diff --git a/ops/keycloak/default.nix b/ops/keycloak/default.nix
new file mode 100644
index 000000000000..5757debd1a39
--- /dev/null
+++ b/ops/keycloak/default.nix
@@ -0,0 +1,8 @@
+{ depot, pkgs, ... }:
+
+depot.nix.readTree.drvTargets {
+  # Provide a Terraform wrapper with the right provider installed.
+  terraform = pkgs.terraform.withPlugins (p: [
+    p.keycloak
+  ]);
+}
diff --git a/ops/keycloak/main.tf b/ops/keycloak/main.tf
new file mode 100644
index 000000000000..819267ff96c5
--- /dev/null
+++ b/ops/keycloak/main.tf
@@ -0,0 +1,34 @@
+# Configure TVL Keycloak instance.
+#
+# TODO(tazjin): Configure GitHub/GitLab IDP
+
+terraform {
+  required_providers {
+    keycloak = {
+      source = "mrparkers/keycloak"
+    }
+  }
+
+  backend "s3" {
+    endpoint = "https://objects.dc-sto1.glesys.net"
+    bucket   = "tvl-state"
+    key      = "terraform/tvl-keycloak"
+    region   = "glesys"
+
+    skip_credentials_validation = true
+    skip_region_validation      = true
+    skip_metadata_api_check     = true
+  }
+}
+
+provider "keycloak" {
+  client_id = "terraform"
+  url       = "https://auth.tvl.fyi"
+}
+
+resource "keycloak_realm" "tvl" {
+  realm                       = "TVL"
+  enabled                     = true
+  display_name                = "The Virus Lounge"
+  default_signature_algorithm = "RS256"
+}
diff --git a/ops/keycloak/user_sources.tf b/ops/keycloak/user_sources.tf
new file mode 100644
index 000000000000..3fde6e07cc91
--- /dev/null
+++ b/ops/keycloak/user_sources.tf
@@ -0,0 +1,21 @@
+# All user sources, that is services from which Keycloak gets user
+# information (either by accessing a system like LDAP or integration
+# through protocols like OIDC).
+
+resource "keycloak_ldap_user_federation" "tvl_ldap" {
+  name                    = "tvl-ldap"
+  realm_id                = keycloak_realm.tvl.id
+  enabled                 = true
+  connection_url          = "ldap://localhost"
+  users_dn                = "ou=users,dc=tvl,dc=fyi"
+  username_ldap_attribute = "cn"
+  uuid_ldap_attribute     = "cn"
+  rdn_ldap_attribute      = "cn"
+  full_sync_period        = 86400
+  trust_email             = true
+
+  user_object_classes = [
+    "inetOrgPerson",
+    "organizationalPerson",
+  ]
+}
diff --git a/ops/kontemplate/.gitignore b/ops/kontemplate/.gitignore
new file mode 100644
index 000000000000..53a04aab3a89
--- /dev/null
+++ b/ops/kontemplate/.gitignore
@@ -0,0 +1,2 @@
+.idea/
+release/
diff --git a/ops/kontemplate/LICENSE b/ops/kontemplate/LICENSE
new file mode 100644
index 000000000000..94a9ed024d38
--- /dev/null
+++ b/ops/kontemplate/LICENSE
@@ -0,0 +1,674 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The GNU General Public License is a free, copyleft license for
+software and other kinds of works.
+
+  The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works.  By contrast,
+the GNU General Public License is intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains free
+software for all its users.  We, the Free Software Foundation, use the
+GNU General Public License for most of our software; it applies also to
+any other work released this way by its authors.  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+them if you wish), that you receive source code or can get it if you
+want it, that you can change the software or use pieces of it in new
+free programs, and that you know you can do these things.
+
+  To protect your rights, we need to prevent others from denying you
+these rights or asking you to surrender the rights.  Therefore, you have
+certain responsibilities if you distribute copies of the software, or if
+you modify it: responsibilities to respect the freedom of others.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must pass on to the recipients the same
+freedoms that you received.  You must make sure that they, too, receive
+or can get the source code.  And you must show them these terms so they
+know their rights.
+
+  Developers that use the GNU GPL protect your rights with two steps:
+(1) assert copyright on the software, and (2) offer you this License
+giving you legal permission to copy, distribute and/or modify it.
+
+  For the developers' and authors' protection, the GPL clearly explains
+that there is no warranty for this free software.  For both users' and
+authors' sake, the GPL requires that modified versions be marked as
+changed, so that their problems will not be attributed erroneously to
+authors of previous versions.
+
+  Some devices are designed to deny users access to install or run
+modified versions of the software inside them, although the manufacturer
+can do so.  This is fundamentally incompatible with the aim of
+protecting users' freedom to change the software.  The systematic
+pattern of such abuse occurs in the area of products for individuals to
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+have designed this version of the GPL to prohibit the practice for those
+products.  If such problems arise substantially in other domains, we
+stand ready to extend this provision to those domains in future versions
+of the GPL, as needed to protect the freedom of users.
+
+  Finally, every program is threatened constantly by software patents.
+States should not allow patents to restrict development and use of
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+patents cannot be used to render the program non-free.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+                       TERMS AND CONDITIONS
+
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+
+  "This License" refers to version 3 of the GNU General Public License.
+
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diff --git a/ops/kontemplate/README.md b/ops/kontemplate/README.md
new file mode 100644
index 000000000000..803a1c4f16fb
--- /dev/null
+++ b/ops/kontemplate/README.md
@@ -0,0 +1,185 @@
+Kontemplate - A simple Kubernetes templater
+===========================================
+
+Kontemplate is a simple CLI tool that can take sets of Kubernetes resource files
+with placeholders and insert values per environment.
+
+This tool was made because in many cases all I want in terms of Kubernetes
+configuration is simple value interpolation per environment (i.e. Kubernetes
+cluster), but with the same deployment files.
+
+In my experience this is often enough and more complex solutions such as
+[Helm][] are not required.
+
+Check out a Kontemplate setup example and the feature list below!
+
+<!-- markdown-toc start - Don't edit this section. Run M-x markdown-toc-refresh-toc -->
+**Table of Contents**
+
+- [Kontemplate - A simple Kubernetes templater](#kontemplate---a-simple-kubernetes-templater)
+    - [Features](#features)
+    - [Example](#example)
+    - [Installation](#installation)
+        - [Homebrew](#homebrew)
+        - [Arch Linux](#arch-linux)
+        - [Building repeatably from source](#building-repeatably-from-source)
+        - [Building from source](#building-from-source)
+    - [Usage](#usage)
+    - [Contributing](#contributing)
+
+<!-- markdown-toc end -->
+
+## Features
+
+* [Simple, yet powerful templates](docs/templates.md)
+* [Clean cluster configuration files](docs/cluster-config.md)
+* [Resources organised as simple resource sets](docs/resource-sets.md)
+* Integration with pass
+* Integration with kubectl
+
+## Example
+
+Kontemplate lets you describe resources as you normally would in a simple folder structure:
+
+```
+.
+├── prod-cluster.yaml
+└── some-api
+    ├── deployment.yaml
+    └── service.yaml
+```
+
+This example has all resources belonging to `some-api` (no file naming conventions enforced at all!) in the `some-api`
+folder and the configuration for the cluster `prod-cluster` in the corresponding file.
+
+Lets take a short look at `prod-cluster.yaml`:
+
+```yaml
+---
+context: k8s.prod.mydomain.com
+global:
+  globalVar: lizards
+include:
+  - name: some-api
+    values:
+      version: 1.0-0e6884d
+      importantFeature: true
+      apiPort: 4567
+```
+
+Those values are then templated into the resource files of `some-api`. That's it!
+
+You can also set up more complicated folder structures for organisation, for example:
+
+```
+.
+├── api
+│   ├── image-api
+│   │   └── deployment.yaml
+│   └── music-api
+│       └── deployment.yaml
+│   │   └── default.json
+├── frontend
+│   ├── main-app
+│   │   ├── deployment.yaml
+│   │   └── service.yaml
+│   └── user-page
+│       ├── deployment.yaml
+│       └── service.yaml
+├── prod-cluster.yaml
+└── test-cluster.yaml
+```
+
+And selectively template or apply resources with a command such as
+`kontemplate apply test-cluster.yaml --include api --include frontend/user-page`
+to only update the `api` resource sets and the `frontend/user-page` resource set.
+
+## Installation
+
+It is recommended to install Kontemplate from the [Nix](https://nixos.org/) package set,
+where it is available since NixOS 17.09 as `kontemplate`.
+
+If using Nix is not an option for you, several other methods of installation are
+available:
+
+### Binary releases
+
+Signed binary releases are available on the [releases page][] for Linux, OS X, FreeBSD and
+Windows.
+
+Releases are signed with the GPG key `DCF34CFAC1AC44B87E26333136EE34814F6D294A`.
+
+### Building from source
+
+You can clone Kontemplate either by cloning the full TVL
+[depot][https://code.tvl.fyi] or by just cloning the kontemplate
+subtree like so:
+
+    git clone https://code.tvl.fyi/depot.git:/ops/kontemplate.git
+
+The `go` tooling can be used as normal with this cloned repository. In
+a full clone of the depot, Nix can be used to build Kontemplate:
+
+    nix-build -A ops.kontemplate
+
+## Usage
+
+You must have `kubectl` installed to use Kontemplate effectively.
+
+```
+usage: kontemplate [<flags>] <command> [<args> ...]
+
+simple Kubernetes resource templating
+
+Flags:
+  -h, --help                 Show context-sensitive help (also try --help-long and --help-man).
+  -i, --include=INCLUDE ...  Resource sets to include explicitly
+  -e, --exclude=EXCLUDE ...  Resource sets to exclude explicitly
+
+Commands:
+  help [<command>...]
+    Show help.
+
+  template <file>
+    Template resource sets and print them
+
+  apply [<flags>] <file>
+    Template resources and pass to 'kubectl apply'
+
+  replace <file>
+    Template resources and pass to 'kubectl replace'
+
+  delete <file>
+    Template resources and pass to 'kubectl delete'
+
+  create <file>
+    Template resources and pass to 'kubectl create'
+
+```
+
+Examples:
+
+```
+# Look at output for a specific resource set and check to see if it's correct ...
+kontemplate template example/prod-cluster.yaml -i some-api
+
+# ... maybe do a dry-run to see what kubectl would do:
+kontemplate apply example/prod-cluster.yaml --dry-run
+
+# And actually apply it if you like what you see:
+kontemplate apply example/prod-cluster.yaml
+```
+
+Check out the feature list and the individual feature documentation above. Then you should be good to go!
+
+## Contributing
+
+Feel free to contribute pull requests, file bugs and open issues with feature suggestions!
+
+Kontemplate is licensed under the GPLv3, a copy of the license and its terms can be found
+in the `LICENSE` file.
+
+Please follow the [code of conduct](CODE_OF_CONDUCT.md).
+
+[Helm]: https://helm.sh/
+[releases page]: https://github.com/tazjin/kontemplate/releases
diff --git a/ops/kontemplate/build-release.sh b/ops/kontemplate/build-release.sh
new file mode 100755
index 000000000000..e4258c53dd09
--- /dev/null
+++ b/ops/kontemplate/build-release.sh
@@ -0,0 +1,75 @@
+#!/usr/bin/env bash
+set -ueo pipefail
+
+# Copyright (C) 2016-2019  Vincent Ambo <mail@tazj.in>
+#
+# This file is part of Kontemplate.
+#
+# Kontemplate is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+readonly GIT_HASH="$(git rev-parse --short HEAD)"
+readonly LDFLAGS="-X main.gitHash=${GIT_HASH} -w -s"
+readonly VERSION="1.8.0-${GIT_HASH}"
+
+function binary-name() {
+    local os="${1}"
+    local target="${2}"
+    if [ "${os}" = "windows" ]; then
+        echo -n "${target}/kontemplate.exe"
+    else
+        echo -n "${target}/kontemplate"
+    fi
+}
+
+function build-for() {
+    local os="${1}"
+    local arch="${2}"
+    local target="release/${os}/${arch}"
+    local bin=$(binary-name "${os}" "${target}")
+
+    echo "Building kontemplate for ${os}-${arch} in ${target}"
+
+    mkdir -p "${target}"
+
+    env GOOS="${os}" GOARCH="${arch}" go build \
+        -ldflags "${LDFLAGS}" \
+        -o "${bin}" \
+        -tags netgo
+}
+
+function sign-for() {
+    local os="${1}"
+    local arch="${2}"
+    local target="release/${os}/${arch}"
+    local bin=$(binary-name "${os}" "${target}")
+    local tar="release/kontemplate-${VERSION}-${os}-${arch}.tar.gz"
+
+    echo "Packing release into ${tar}"
+    tar czvf "${tar}" -C "${target}" $(basename "${bin}")
+
+    local hash=$(sha256sum "${tar}")
+    echo "Signing kontemplate release tarball for ${os}-${arch} with SHA256 ${hash}"
+    gpg --armor --detach-sig --sign "${tar}"
+}
+
+case "${1}" in
+    "build")
+        # Build releases for various operating systems:
+        build-for "linux" "amd64"
+        build-for "darwin" "amd64"
+        build-for "windows" "amd64"
+        build-for "freebsd" "amd64"
+        exit 0
+        ;;
+    "sign")
+        # Bundle and sign releases:
+        sign-for "linux" "amd64"
+        sign-for "darwin" "amd64"
+        sign-for "windows" "amd64"
+        sign-for "freebsd" "amd64"
+        exit 0
+        ;;
+esac
diff --git a/ops/kontemplate/context/context.go b/ops/kontemplate/context/context.go
new file mode 100644
index 000000000000..2d0378a0ec23
--- /dev/null
+++ b/ops/kontemplate/context/context.go
@@ -0,0 +1,266 @@
+// Copyright (C) 2016-2019  Vincent Ambo <mail@tazj.in>
+//
+// This file is part of Kontemplate.
+//
+// Kontemplate is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+package context
+
+import (
+	"fmt"
+	"path"
+	"strings"
+
+	"github.com/tazjin/kontemplate/util"
+)
+
+type ResourceSet struct {
+	// Name of the resource set. This can be used in include/exclude statements during kontemplate runs.
+	Name string `json:"name"`
+
+	// Path to the folder containing the files for this resource set. This defaults to the value of the 'name' field
+	// if unset.
+	Path string `json:"path"`
+
+	// Values to include when interpolating resources from this resource set.
+	Values map[string]interface{} `json:"values"`
+
+	// Args to pass on to kubectl for this resource set.
+	Args []string `json:"args"`
+
+	// Nested resource sets to include
+	Include []ResourceSet `json:"include"`
+
+	// Parent resource set for flattened resource sets. Should not be manually specified.
+	Parent string
+}
+
+type Context struct {
+	// The name of the kubectl context
+	Name string `json:"context"`
+
+	// Global variables that should be accessible by all resource sets
+	Global map[string]interface{} `json:"global"`
+
+	// File names of YAML or JSON files including extra variables that should be globally accessible
+	VariableImportFiles []string `json:"import"`
+
+	// The resource sets to include in this context
+	ResourceSets []ResourceSet `json:"include"`
+
+	// Variables imported from additional files
+	ImportedVars map[string]interface{}
+
+	// Explicitly set variables (via `--var`) that should override all others
+	ExplicitVars map[string]interface{}
+
+	// This field represents the absolute path to the context base directory and should not be manually specified.
+	BaseDir string
+}
+
+func contextLoadingError(filename string, cause error) error {
+	return fmt.Errorf("Context loading failed on file %s due to: \n%v", filename, cause)
+}
+
+// Attempt to load and deserialise a Context from the specified file.
+func LoadContext(filename string, explicitVars *[]string) (*Context, error) {
+	var ctx Context
+	err := util.LoadData(filename, &ctx)
+
+	if err != nil {
+		return nil, contextLoadingError(filename, err)
+	}
+
+	ctx.BaseDir = path.Dir(filename)
+
+	// Prepare the resource sets by resolving parents etc.
+	ctx.ResourceSets = flattenPrepareResourceSetPaths(&ctx.BaseDir, &ctx.ResourceSets)
+
+	// Add variables explicitly specified on the command line
+	ctx.ExplicitVars, err = loadExplicitVars(explicitVars)
+	if err != nil {
+		return nil, fmt.Errorf("Error setting explicit variables: %v\n", err)
+	}
+
+	// Add variables loaded from import files
+	ctx.ImportedVars, err = ctx.loadImportedVariables()
+	if err != nil {
+		return nil, contextLoadingError(filename, err)
+	}
+
+	// Merge variables defined at different levels. The
+	// `mergeContextValues` function is documented with the merge
+	// hierarchy.
+	ctx.ResourceSets = ctx.mergeContextValues()
+
+	if err != nil {
+		return nil, contextLoadingError(filename, err)
+	}
+
+	return &ctx, nil
+}
+
+// Kontemplate supports specifying additional variable files with the
+// `import` keyword. This function loads those variable files and
+// merges them together with the context's other global variables.
+func (ctx *Context) loadImportedVariables() (map[string]interface{}, error) {
+	allImportedVars := make(map[string]interface{})
+
+	for _, file := range ctx.VariableImportFiles {
+		// Ensure that the filename is not merged with the baseDir if
+		// it is set to an absolute path.
+		var filePath string
+		if path.IsAbs(file) {
+			filePath = file
+		} else {
+			filePath = path.Join(ctx.BaseDir, file)
+		}
+
+		var importedVars map[string]interface{}
+		err := util.LoadData(filePath, &importedVars)
+
+		if err != nil {
+			return nil, err
+		}
+
+		allImportedVars = *util.Merge(&allImportedVars, &importedVars)
+	}
+
+	return allImportedVars, nil
+}
+
+// Correctly prepares the file paths for resource sets by inferring implicit paths and flattening resource set
+// collections, i.e. resource sets that themselves have an additional 'include' field set.
+// Those will be regarded as a short-hand for including multiple resource sets from a subfolder.
+// See https://github.com/tazjin/kontemplate/issues/9 for more information.
+func flattenPrepareResourceSetPaths(baseDir *string, rs *[]ResourceSet) []ResourceSet {
+	flattened := make([]ResourceSet, 0)
+
+	for _, r := range *rs {
+		// If a path is not explicitly specified it should default to the resource set name.
+		// This is also the classic behaviour prior to kontemplate 1.2
+		if r.Path == "" {
+			r.Path = r.Name
+		}
+
+		// Paths are made absolute by resolving them relative to the context base,
+		// unless absolute paths were specified.
+		if !path.IsAbs(r.Path) {
+			r.Path = path.Join(*baseDir, r.Path)
+		}
+
+		if len(r.Include) == 0 {
+			flattened = append(flattened, r)
+		} else {
+			for _, subResourceSet := range r.Include {
+				if subResourceSet.Path == "" {
+					subResourceSet.Path = subResourceSet.Name
+				}
+
+				subResourceSet.Parent = r.Name
+				subResourceSet.Name = path.Join(r.Name, subResourceSet.Name)
+				subResourceSet.Path = path.Join(r.Path, subResourceSet.Path)
+				subResourceSet.Values = *util.Merge(&r.Values, &subResourceSet.Values)
+				flattened = append(flattened, subResourceSet)
+			}
+		}
+	}
+
+	return flattened
+}
+
+// Merges the context and resource set variables according in the
+// desired precedence order.
+//
+// For now the reasoning behind the merge order is from least specific
+// in relation to the cluster configuration, which means that the
+// precedence is (in ascending order):
+//
+// 1. Default values in resource sets.
+// 2. Values imported from files (via `import:`)
+// 3. Global values in a cluster configuration
+// 4. Values set in a resource set's `include`-section
+// 5. Explicit values set on the CLI (`--var`)
+//
+// For a discussion on the reasoning behind this order, please consult
+// https://github.com/tazjin/kontemplate/issues/142
+func (ctx *Context) mergeContextValues() []ResourceSet {
+	updated := make([]ResourceSet, len(ctx.ResourceSets))
+
+	// Merging has to happen separately for every individual
+	// resource set to make use of the default values:
+	for i, rs := range ctx.ResourceSets {
+		// Begin by loading default values from the resource
+		// sets configuration.
+		//
+		// Resource sets are used across different cluster
+		// contexts and the default values in them have the
+		// lowest precedence.
+		defaultValues := loadDefaultValues(&rs, ctx)
+
+		// Continue by merging default values with values
+		// imported from external files. Those values are also
+		// used across cluster contexts, but have higher
+		// precedence than defaults.
+		merged := util.Merge(defaultValues, &ctx.ImportedVars)
+
+		// Merge global values defined in the cluster context:
+		merged = util.Merge(merged, &ctx.Global)
+
+		// Merge values configured in the resource set's
+		// `include` section:
+		merged = util.Merge(merged, &rs.Values)
+
+		// Merge values defined explicitly on the CLI:
+		merged = util.Merge(merged, &ctx.ExplicitVars)
+
+		// Continue with the newly merged resource set:
+		rs.Values = *merged
+		updated[i] = rs
+	}
+
+	return updated
+}
+
+// Loads default values for a resource set collection from
+// path/to/set/default.{json|yaml}.
+func loadDefaultValues(rs *ResourceSet, c *Context) *map[string]interface{} {
+	var defaultVars map[string]interface{}
+
+	for _, filename := range util.DefaultFilenames {
+		err := util.LoadData(path.Join(rs.Path, filename), &defaultVars)
+		if err == nil {
+			return &defaultVars
+		}
+	}
+
+	// The actual error is not inspected here. The reasoning for
+	// this is that in case of serious problems (e.g. permission
+	// issues with the folder / folder not existing) failure will
+	// occur a bit later anyways.
+	//
+	// Otherwise we'd have to differentiate between
+	// file-not-found-errors (no default values specified) and
+	// other errors here.
+	return &rs.Values
+}
+
+// Prepares the variables specified explicitly via `--var` when
+// executing kontemplate for adding to the context.
+func loadExplicitVars(vars *[]string) (map[string]interface{}, error) {
+	explicitVars := make(map[string]interface{}, len(*vars))
+
+	for _, v := range *vars {
+		varParts := strings.SplitN(v, "=", 2)
+		if len(varParts) != 2 {
+			return nil, fmt.Errorf(`invalid explicit variable provided (%s), name and value should be separated with "="`, v)
+		}
+
+		explicitVars[varParts[0]] = varParts[1]
+	}
+
+	return explicitVars, nil
+}
diff --git a/ops/kontemplate/context/context_test.go b/ops/kontemplate/context/context_test.go
new file mode 100644
index 000000000000..471eb246cf2f
--- /dev/null
+++ b/ops/kontemplate/context/context_test.go
@@ -0,0 +1,353 @@
+// Copyright (C) 2016-2019  Vincent Ambo <mail@tazj.in>
+//
+// This file is part of Kontemplate.
+//
+// Kontemplate is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+package context
+
+import (
+	"reflect"
+	"testing"
+)
+
+var noExplicitVars []string = make([]string, 0)
+
+func TestLoadFlatContextFromFile(t *testing.T) {
+	ctx, err := LoadContext("testdata/flat-test.yaml", &noExplicitVars)
+
+	if err != nil {
+		t.Error(err)
+		t.Fail()
+	}
+
+	expected := Context{
+		Name: "k8s.prod.mydomain.com",
+		Global: map[string]interface{}{
+			"globalVar": "lizards",
+		},
+		ResourceSets: []ResourceSet{
+			{
+				Name: "some-api",
+				Path: "testdata/some-api",
+				Values: map[string]interface{}{
+					"apiPort":          float64(4567), // yep!
+					"importantFeature": true,
+					"version":          "1.0-0e6884d",
+					"globalVar":        "lizards",
+				},
+				Include: nil,
+				Parent:  "",
+			},
+		},
+		BaseDir:      "testdata",
+		ImportedVars: make(map[string]interface{}, 0),
+		ExplicitVars: make(map[string]interface{}, 0),
+	}
+
+	if !reflect.DeepEqual(*ctx, expected) {
+		t.Error("Loaded context and expected context did not match")
+		t.Fail()
+	}
+}
+
+func TestLoadContextWithArgs(t *testing.T) {
+	ctx, err := LoadContext("testdata/flat-with-args-test.yaml", &noExplicitVars)
+
+	if err != nil {
+		t.Error(err)
+		t.Fail()
+	}
+
+	expected := Context{
+		Name: "k8s.prod.mydomain.com",
+		ResourceSets: []ResourceSet{
+			{
+				Name:   "some-api",
+				Path:   "testdata/some-api",
+				Values: make(map[string]interface{}, 0),
+				Args: []string{
+					"--as=some-user",
+					"--as-group=hello:world",
+					"--as-banana",
+					"true",
+				},
+				Include: nil,
+				Parent:  "",
+			},
+		},
+		BaseDir:      "testdata",
+		ImportedVars: make(map[string]interface{}, 0),
+		ExplicitVars: make(map[string]interface{}, 0),
+	}
+
+	if !reflect.DeepEqual(*ctx, expected) {
+		t.Error("Loaded context and expected context did not match")
+		t.Fail()
+	}
+}
+
+func TestLoadContextWithResourceSetCollections(t *testing.T) {
+	ctx, err := LoadContext("testdata/collections-test.yaml", &noExplicitVars)
+
+	if err != nil {
+		t.Error(err)
+		t.Fail()
+	}
+
+	expected := Context{
+		Name: "k8s.prod.mydomain.com",
+		Global: map[string]interface{}{
+			"globalVar": "lizards",
+		},
+		ResourceSets: []ResourceSet{
+			{
+				Name: "some-api",
+				Path: "testdata/some-api",
+				Values: map[string]interface{}{
+					"apiPort":          float64(4567), // yep!
+					"importantFeature": true,
+					"version":          "1.0-0e6884d",
+					"globalVar":        "lizards",
+				},
+				Include: nil,
+				Parent:  "",
+			},
+			{
+				Name: "collection/nested",
+				Path: "testdata/collection/nested",
+				Values: map[string]interface{}{
+					"lizards":   "good",
+					"globalVar": "lizards",
+				},
+				Include: nil,
+				Parent:  "collection",
+			},
+		},
+		BaseDir:      "testdata",
+		ImportedVars: make(map[string]interface{}, 0),
+		ExplicitVars: make(map[string]interface{}, 0),
+	}
+
+	if !reflect.DeepEqual(*ctx, expected) {
+		t.Error("Loaded context and expected context did not match")
+		t.Fail()
+	}
+
+}
+
+func TestSubresourceVariableInheritance(t *testing.T) {
+	ctx, err := LoadContext("testdata/parent-variables.yaml", &noExplicitVars)
+
+	if err != nil {
+		t.Error(err)
+		t.Fail()
+	}
+
+	expected := Context{
+		Name: "k8s.prod.mydomain.com",
+		ResourceSets: []ResourceSet{
+			{
+				Name: "parent/child",
+				Path: "testdata/parent/child",
+				Values: map[string]interface{}{
+					"foo": "bar",
+					"bar": "baz",
+				},
+				Include: nil,
+				Parent:  "parent",
+			},
+		},
+		BaseDir:      "testdata",
+		ImportedVars: make(map[string]interface{}, 0),
+		ExplicitVars: make(map[string]interface{}, 0),
+	}
+
+	if !reflect.DeepEqual(*ctx, expected) {
+		t.Error("Loaded and expected context did not match")
+		t.Fail()
+	}
+}
+
+func TestSubresourceVariableInheritanceOverride(t *testing.T) {
+	ctx, err := LoadContext("testdata/parent-variable-override.yaml", &noExplicitVars)
+
+	if err != nil {
+		t.Error(err)
+		t.Fail()
+	}
+
+	expected := Context{
+		Name: "k8s.prod.mydomain.com",
+		ResourceSets: []ResourceSet{
+			{
+				Name: "parent/child",
+				Path: "testdata/parent/child",
+				Values: map[string]interface{}{
+					"foo": "newvalue",
+				},
+				Include: nil,
+				Parent:  "parent",
+			},
+		},
+		BaseDir:      "testdata",
+		ImportedVars: make(map[string]interface{}, 0),
+		ExplicitVars: make(map[string]interface{}, 0),
+	}
+
+	if !reflect.DeepEqual(*ctx, expected) {
+		t.Error("Loaded and expected context did not match")
+		t.Fail()
+	}
+}
+
+func TestDefaultValuesLoading(t *testing.T) {
+	ctx, err := LoadContext("testdata/default-loading.yaml", &noExplicitVars)
+	if err != nil {
+		t.Error(err)
+		t.Fail()
+	}
+
+	rs := ctx.ResourceSets[0]
+	if rs.Values["defaultValues"] != "loaded" {
+		t.Errorf("Default values not loaded from YAML file")
+		t.Fail()
+	}
+
+	if rs.Values["override"] != "notAtAll" {
+		t.Error("Default values should not override other values")
+		t.Fail()
+	}
+}
+
+func TestImportValuesLoading(t *testing.T) {
+	ctx, err := LoadContext("testdata/import-vars-simple.yaml", &noExplicitVars)
+	if err != nil {
+		t.Error(err)
+		t.Fail()
+	}
+
+	expected := map[string]interface{}{
+		"override": "true",
+		"music": map[string]interface{}{
+			"artist": "Pallida",
+			"track":  "Tractor Beam",
+		},
+	}
+
+	if !reflect.DeepEqual(ctx.ImportedVars, expected) {
+		t.Error("Expected imported values after loading imports did not match!")
+		t.Fail()
+	}
+}
+
+func TestExplicitPathLoading(t *testing.T) {
+	ctx, err := LoadContext("testdata/explicit-path.yaml", &noExplicitVars)
+	if err != nil {
+		t.Error(err)
+		t.Fail()
+	}
+
+	expected := Context{
+		Name: "k8s.prod.mydomain.com",
+		ResourceSets: []ResourceSet{
+			{
+				Name: "some-api-europe",
+				Path: "testdata/some-api",
+				Values: map[string]interface{}{
+					"location": "europe",
+				},
+				Include: nil,
+				Parent:  "",
+			},
+			{
+				Name: "some-api-asia",
+				Path: "testdata/some-api",
+				Values: map[string]interface{}{
+					"location": "asia",
+				},
+				Include: nil,
+				Parent:  "",
+			},
+		},
+		BaseDir:      "testdata",
+		ImportedVars: make(map[string]interface{}, 0),
+		ExplicitVars: make(map[string]interface{}, 0),
+	}
+
+	if !reflect.DeepEqual(*ctx, expected) {
+		t.Error("Loaded context and expected context did not match")
+		t.Fail()
+	}
+}
+
+func TestExplicitSubresourcePathLoading(t *testing.T) {
+	ctx, err := LoadContext("testdata/explicit-subresource-path.yaml", &noExplicitVars)
+	if err != nil {
+		t.Error(err)
+		t.Fail()
+	}
+
+	expected := Context{
+		Name: "k8s.prod.mydomain.com",
+		ResourceSets: []ResourceSet{
+			{
+				Name:   "parent/child",
+				Path:   "testdata/parent-path/child-path",
+				Parent: "parent",
+				Values: make(map[string]interface{}, 0),
+			},
+		},
+		BaseDir:      "testdata",
+		ImportedVars: make(map[string]interface{}, 0),
+		ExplicitVars: make(map[string]interface{}, 0),
+	}
+
+	if !reflect.DeepEqual(*ctx, expected) {
+		t.Error("Loaded context and expected context did not match")
+		t.Fail()
+	}
+}
+
+func TestSetVariablesFromArguments(t *testing.T) {
+	vars := []string{"version=some-service-version"}
+	ctx, _ := LoadContext("testdata/default-loading.yaml", &vars)
+
+	if version := ctx.ExplicitVars["version"]; version != "some-service-version" {
+		t.Errorf(`Expected variable "version" to have value "some-service-version" but was "%s"`, version)
+	}
+}
+
+func TestSetInvalidVariablesFromArguments(t *testing.T) {
+	vars := []string{"version: some-service-version"}
+	_, err := LoadContext("testdata/default-loading.yaml", &vars)
+
+	if err == nil {
+		t.Error("Expected invalid variable to return an error")
+	}
+}
+
+// This test ensures that variables are merged in the correct order.
+// Please consult the test data in `testdata/merging`.
+func TestValueMergePrecedence(t *testing.T) {
+	cliVars := []string{"cliVar=cliVar"}
+	ctx, _ := LoadContext("testdata/merging/context.yaml", &cliVars)
+
+	expected := map[string]interface{}{
+		"defaultVar": "defaultVar",
+		"importVar":  "importVar",
+		"globalVar":  "globalVar",
+		"includeVar": "includeVar",
+		"cliVar":     "cliVar",
+	}
+
+	result := ctx.ResourceSets[0].Values
+
+	if !reflect.DeepEqual(expected, result) {
+		t.Errorf("Merged values did not match expected result: \n%v", result)
+		t.Fail()
+	}
+}
diff --git a/ops/kontemplate/context/testdata/collections-test.yaml b/ops/kontemplate/context/testdata/collections-test.yaml
new file mode 100644
index 000000000000..a619c8cfddcc
--- /dev/null
+++ b/ops/kontemplate/context/testdata/collections-test.yaml
@@ -0,0 +1,15 @@
+---
+context: k8s.prod.mydomain.com
+global:
+  globalVar: lizards
+include:
+  - name: some-api
+    values:
+      version: 1.0-0e6884d
+      importantFeature: true
+      apiPort: 4567
+  - name: collection
+    include:
+      - name: nested
+        values:
+          lizards: good
diff --git a/ops/kontemplate/context/testdata/default-loading.yaml b/ops/kontemplate/context/testdata/default-loading.yaml
new file mode 100644
index 000000000000..d589c99b4eaf
--- /dev/null
+++ b/ops/kontemplate/context/testdata/default-loading.yaml
@@ -0,0 +1,6 @@
+---
+context: default-loading
+include:
+  - name: default
+    values:
+      override: notAtAll
\ No newline at end of file
diff --git a/ops/kontemplate/context/testdata/default/default.yaml b/ops/kontemplate/context/testdata/default/default.yaml
new file mode 100644
index 000000000000..0ffa3cd81f24
--- /dev/null
+++ b/ops/kontemplate/context/testdata/default/default.yaml
@@ -0,0 +1,2 @@
+defaultValues: loaded
+override: noop
\ No newline at end of file
diff --git a/ops/kontemplate/context/testdata/explicit-path.yaml b/ops/kontemplate/context/testdata/explicit-path.yaml
new file mode 100644
index 000000000000..2c81f83c0919
--- /dev/null
+++ b/ops/kontemplate/context/testdata/explicit-path.yaml
@@ -0,0 +1,11 @@
+---
+context: k8s.prod.mydomain.com
+include:
+  - name: some-api-europe
+    path: some-api
+    values:
+      location: europe
+  - name: some-api-asia
+    path: some-api
+    values:
+      location: asia
diff --git a/ops/kontemplate/context/testdata/explicit-subresource-path.yaml b/ops/kontemplate/context/testdata/explicit-subresource-path.yaml
new file mode 100644
index 000000000000..6cf86183229e
--- /dev/null
+++ b/ops/kontemplate/context/testdata/explicit-subresource-path.yaml
@@ -0,0 +1,8 @@
+---
+context: k8s.prod.mydomain.com
+include:
+  - name: parent
+    path: parent-path
+    include:
+      - name: child
+        path: child-path
diff --git a/ops/kontemplate/context/testdata/flat-test.yaml b/ops/kontemplate/context/testdata/flat-test.yaml
new file mode 100644
index 000000000000..dd7804f719c3
--- /dev/null
+++ b/ops/kontemplate/context/testdata/flat-test.yaml
@@ -0,0 +1,10 @@
+---
+context: k8s.prod.mydomain.com
+global:
+  globalVar: lizards
+include:
+  - name: some-api
+    values:
+      version: 1.0-0e6884d
+      importantFeature: true
+      apiPort: 4567
diff --git a/ops/kontemplate/context/testdata/flat-with-args-test.yaml b/ops/kontemplate/context/testdata/flat-with-args-test.yaml
new file mode 100644
index 000000000000..29d3334fb54d
--- /dev/null
+++ b/ops/kontemplate/context/testdata/flat-with-args-test.yaml
@@ -0,0 +1,9 @@
+---
+context: k8s.prod.mydomain.com
+include:
+  - name: some-api
+    args:
+      - --as=some-user
+      - --as-group=hello:world
+      - --as-banana
+      - "true"
diff --git a/ops/kontemplate/context/testdata/import-vars-simple.yaml b/ops/kontemplate/context/testdata/import-vars-simple.yaml
new file mode 100644
index 000000000000..12244e1ab174
--- /dev/null
+++ b/ops/kontemplate/context/testdata/import-vars-simple.yaml
@@ -0,0 +1,5 @@
+---
+context: k8s.prod.mydomain.com
+import:
+  - test-vars.yaml
+include: []
diff --git a/ops/kontemplate/context/testdata/merging/context.yaml b/ops/kontemplate/context/testdata/merging/context.yaml
new file mode 100644
index 000000000000..df30d3d8cbe3
--- /dev/null
+++ b/ops/kontemplate/context/testdata/merging/context.yaml
@@ -0,0 +1,15 @@
+# This context file is intended to test the merge hierarchy of
+# variables defined at different levels.
+---
+context: merging.in.kontemplate.works
+global:
+  globalVar: globalVar
+  includeVar: should be overridden (global)
+  cliVar: should be overridden (global)
+import:
+  - import-vars.yaml
+include:
+  - name: resource
+    values:
+      includeVar: includeVar
+      cliVar: should be overridden (include)
diff --git a/ops/kontemplate/context/testdata/merging/import-vars.yaml b/ops/kontemplate/context/testdata/merging/import-vars.yaml
new file mode 100644
index 000000000000..2a51352571a6
--- /dev/null
+++ b/ops/kontemplate/context/testdata/merging/import-vars.yaml
@@ -0,0 +1,4 @@
+importVar: importVar
+globalVar: should be overridden (import)
+includeVar: should be overridden (import)
+cliVar: should be overridden (import)
diff --git a/ops/kontemplate/context/testdata/merging/resource/default.yaml b/ops/kontemplate/context/testdata/merging/resource/default.yaml
new file mode 100644
index 000000000000..040a19aaba25
--- /dev/null
+++ b/ops/kontemplate/context/testdata/merging/resource/default.yaml
@@ -0,0 +1,5 @@
+defaultVar: defaultVar
+importVar: should be overridden (default)
+globalVar: should be overridden (default)
+includeVar: should be overridden (default)
+cliVar: should be overridden (default)
diff --git a/ops/kontemplate/context/testdata/merging/resource/output.yaml b/ops/kontemplate/context/testdata/merging/resource/output.yaml
new file mode 100644
index 000000000000..5920b2720780
--- /dev/null
+++ b/ops/kontemplate/context/testdata/merging/resource/output.yaml
@@ -0,0 +1,5 @@
+defaultVar: {{ .defaultVar }}
+importVar: {{ .importVar }}
+globalVar: {{ .globalVar }}
+includeVar: {{ .includeVar }}
+cliVar: {{ .cliVar }}
diff --git a/ops/kontemplate/context/testdata/parent-variable-override.yaml b/ops/kontemplate/context/testdata/parent-variable-override.yaml
new file mode 100644
index 000000000000..42676c3028fe
--- /dev/null
+++ b/ops/kontemplate/context/testdata/parent-variable-override.yaml
@@ -0,0 +1,10 @@
+---
+context: k8s.prod.mydomain.com
+include:
+  - name: parent
+    values:
+      foo: bar
+    include:
+      - name: child
+        values:
+          foo: newvalue
diff --git a/ops/kontemplate/context/testdata/parent-variables.yaml b/ops/kontemplate/context/testdata/parent-variables.yaml
new file mode 100644
index 000000000000..8459fd30405b
--- /dev/null
+++ b/ops/kontemplate/context/testdata/parent-variables.yaml
@@ -0,0 +1,10 @@
+---
+context: k8s.prod.mydomain.com
+include:
+  - name: parent
+    values:
+      foo: bar
+    include:
+      - name: child
+        values:
+          bar: baz
diff --git a/ops/kontemplate/context/testdata/test-vars-override.yaml b/ops/kontemplate/context/testdata/test-vars-override.yaml
new file mode 100644
index 000000000000..5215c559c136
--- /dev/null
+++ b/ops/kontemplate/context/testdata/test-vars-override.yaml
@@ -0,0 +1,3 @@
+---
+override: 3
+place: Oslo
diff --git a/ops/kontemplate/context/testdata/test-vars.yaml b/ops/kontemplate/context/testdata/test-vars.yaml
new file mode 100644
index 000000000000..af27bdc455bf
--- /dev/null
+++ b/ops/kontemplate/context/testdata/test-vars.yaml
@@ -0,0 +1,5 @@
+---
+override: 'true'
+music:
+  artist: Pallida
+  track: Tractor Beam
diff --git a/ops/kontemplate/default.nix b/ops/kontemplate/default.nix
new file mode 100644
index 000000000000..1190869c3fda
--- /dev/null
+++ b/ops/kontemplate/default.nix
@@ -0,0 +1,36 @@
+# Copyright (C) 2016-2021  Vincent Ambo <mail@tazj.in>
+#
+# This file is part of Kontemplate.
+#
+# Kontemplate is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This file is the Nix derivation used to install Kontemplate on
+# Nix-based systems.
+
+{ lib, pkgs, ... }:
+
+pkgs.buildGoPackage rec {
+  name = "kontemplate-${version}";
+  version = "canon";
+  src = ./.;
+  goPackagePath = "github.com/tazjin/kontemplate";
+  goDeps = ./deps.nix;
+  buildInputs = [ pkgs.parallel ];
+
+  # Enable checks and configure check-phase to include vet:
+  doCheck = true;
+  preCheck = ''
+    for pkg in $(getGoDirs ""); do
+      buildGoDir vet "$pkg"
+    done
+  '';
+
+  meta = with lib; {
+    description = "A resource templating helper for Kubernetes";
+    homepage = "http://kontemplate.works/";
+    license = licenses.gpl3;
+  };
+}
diff --git a/ops/kontemplate/deps.nix b/ops/kontemplate/deps.nix
new file mode 100644
index 000000000000..7693968bd550
--- /dev/null
+++ b/ops/kontemplate/deps.nix
@@ -0,0 +1,111 @@
+# This file was generated by https://github.com/kamilchm/go2nix v1.3.0
+[
+  {
+    goPackagePath = "github.com/Masterminds/goutils";
+    fetch = {
+      type = "git";
+      url = "https://github.com/Masterminds/goutils";
+      rev = "41ac8693c5c10a92ea1ff5ac3a7f95646f6123b0";
+      sha256 = "180px47gj936qyk5bkv5mbbgiil9abdjq6kwkf7sq70vyi9mcfiq";
+    };
+  }
+  {
+    goPackagePath = "github.com/Masterminds/semver";
+    fetch = {
+      type = "git";
+      url = "https://github.com/Masterminds/semver";
+      rev = "5bc3b9184d48f1412b300b87a200cf020d9254cf";
+      sha256 = "1vdfm653v50jf63cw0kg2hslx50cn4mk6lj3p51bi11jrg48kfng";
+    };
+  }
+  {
+    goPackagePath = "github.com/Masterminds/sprig";
+    fetch = {
+      type = "git";
+      url = "https://github.com/Masterminds/sprig";
+      rev = "6f509977777c33eae63b2136d97f7b976cb971cc";
+      sha256 = "05h9k6fhjxnpwlihj3z02q9kvqvnq53jix0ab84sx0666bci3cdh";
+    };
+  }
+  {
+    goPackagePath = "github.com/alecthomas/template";
+    fetch = {
+      type = "git";
+      url = "https://github.com/alecthomas/template";
+      rev = "fb15b899a75114aa79cc930e33c46b577cc664b1";
+      sha256 = "1vlasv4dgycydh5wx6jdcvz40zdv90zz1h7836z7lhsi2ymvii26";
+    };
+  }
+  {
+    goPackagePath = "github.com/alecthomas/units";
+    fetch = {
+      type = "git";
+      url = "https://github.com/alecthomas/units";
+      rev = "c3de453c63f4bdb4dadffab9805ec00426c505f7";
+      sha256 = "0js37zlgv37y61j4a2d46jh72xm5kxmpaiw0ya9v944bjpc386my";
+    };
+  }
+  {
+    goPackagePath = "github.com/ghodss/yaml";
+    fetch = {
+      type = "git";
+      url = "https://github.com/ghodss/yaml";
+      rev = "25d852aebe32c875e9c044af3eef9c7dc6bc777f";
+      sha256 = "1w9yq0bxzygc4qwkwwiy7k1k1yviaspcqqv18255k2xkjv5ipccz";
+    };
+  }
+  {
+    goPackagePath = "github.com/google/uuid";
+    fetch = {
+      type = "git";
+      url = "https://github.com/google/uuid";
+      rev = "c2e93f3ae59f2904160ceaab466009f965df46d6";
+      sha256 = "0zw8fvl6jqg0fmv6kmvhss0g4gkrbvgyvl2zgy5wdbdlgp4fja0h";
+    };
+  }
+  {
+    goPackagePath = "github.com/huandu/xstrings";
+    fetch = {
+      type = "git";
+      url = "https://github.com/huandu/xstrings";
+      rev = "8bbcf2f9ccb55755e748b7644164cd4bdce94c1d";
+      sha256 = "1ivvc95514z63k7cpz71l0dwlanffmsh1pijhaqmp41kfiby8rsx";
+    };
+  }
+  {
+    goPackagePath = "github.com/imdario/mergo";
+    fetch = {
+      type = "git";
+      url = "https://github.com/imdario/mergo";
+      rev = "4c317f2286be3bd0c4f1a0e622edc6398ec4656d";
+      sha256 = "0bihha1qsgfjk14yv1hwddv3d8dzxpbjlaxwwyys6lhgxz1cr9h9";
+    };
+  }
+  {
+    goPackagePath = "golang.org/x/crypto";
+    fetch = {
+      type = "git";
+      url = "https://go.googlesource.com/crypto";
+      rev = "9756ffdc24725223350eb3266ffb92590d28f278";
+      sha256 = "0q7hxaaq6lp0v8qqzifvysl47z5rfdlrxkh3d29vsl3wyby3dxl8";
+    };
+  }
+  {
+    goPackagePath = "gopkg.in/alecthomas/kingpin.v2";
+    fetch = {
+      type = "git";
+      url = "https://gopkg.in/alecthomas/kingpin.v2";
+      rev = "947dcec5ba9c011838740e680966fd7087a71d0d";
+      sha256 = "0mndnv3hdngr3bxp7yxfd47cas4prv98sqw534mx7vp38gd88n5r";
+    };
+  }
+  {
+    goPackagePath = "gopkg.in/yaml.v2";
+    fetch = {
+      type = "git";
+      url = "https://gopkg.in/yaml.v2";
+      rev = "51d6538a90f86fe93ac480b35f37b2be17fef232";
+      sha256 = "01wj12jzsdqlnidpyjssmj0r4yavlqy7dwrg7adqd8dicjc4ncsa";
+    };
+  }
+]
diff --git a/ops/kontemplate/docs/cluster-config.md b/ops/kontemplate/docs/cluster-config.md
new file mode 100644
index 000000000000..4e870161796d
--- /dev/null
+++ b/ops/kontemplate/docs/cluster-config.md
@@ -0,0 +1,106 @@
+Cluster configuration
+==========================
+
+Every cluster (or "environment") that requires individual configuration is specified in
+a very simple YAML file in Kontemplate.
+
+An example file for a hypothetical test environment could look like this:
+
+```yaml
+---
+context: k8s.test.mydomain.com
+global:
+  clusterName: test-cluster
+  defaultReplicas: 2
+import:
+  - test-secrets.yaml
+include:
+  - name: gateway
+    path: tools/nginx
+    values:
+      tlsDomains:
+        - test.oslo.pub
+        - test.tazj.in
+  - path: backend
+    values:
+      env: test
+    include:
+      - name: blog
+        values:
+          url: test.tazj.in
+      - name: pub-service
+```
+
+<!-- markdown-toc start - Don't edit this section. Run M-x markdown-toc-refresh-toc -->
+**Table of Contents**
+
+- [Cluster configuration](#cluster-configuration)
+    - [Fields](#fields)
+        - [`context`](#context)
+        - [`global`](#global)
+        - [`import`](#import)
+        - [`include`](#include)
+    - [External variables](#external-variables)
+
+<!-- markdown-toc end -->
+
+## Fields
+
+This is documentation for the individual fields in a cluster context file.
+
+### `context`
+
+The `context` field contains the name of the kubectl-context. You can list context names with
+'kubectl config get-contexts'.
+
+This must be set here so that Kontemplate can use the correct context when calling kubectl.
+
+This field is **required** for `kubectl`-wrapping commands. It can be left out if only the `template`-command is used.
+
+### `global`
+
+The `global` field contains a key/value map of variables that should be available to all resource
+sets in the cluster.
+
+This field is **optional**.
+
+### `import`
+
+The `import` field contains the file names of additional YAML or JSON files from which global
+variables should be loaded. Using this field makes it possible to keep certain configuration that
+is the same for some, but not all, clusters in a common place.
+
+This field is **optional**.
+
+### `include`
+
+The `include` field contains the actual resource sets to be included in the cluster.
+
+Information about the structure of resource sets can be found in the [resource set documentation][].
+
+This field is **required**.
+
+## External variables
+
+As mentioned above, extra variables can be loaded from additional YAML or JSON files. Assuming you
+have a file called `test-secrets.yaml` which contains variables that should be shared between a `test`
+and `dev` cluster, you could import it in your context as such:
+
+```yaml
+# test-secrets.yaml:
+mySecretVar: foo-bar-12345
+
+# test-cluster.yaml:
+context: k8s.test.mydomain.com
+import:
+  - test-secrets.yaml
+
+# dev-cluster.yaml:
+context: k8s.dev.mydomain.com
+import:
+  - test-secrets.yaml
+```
+
+The variable `mySecretVar` is then available as a global variable.
+
+[resource set documentation]: resource-sets.md
diff --git a/ops/kontemplate/docs/resource-sets.md b/ops/kontemplate/docs/resource-sets.md
new file mode 100644
index 000000000000..1444dd491249
--- /dev/null
+++ b/ops/kontemplate/docs/resource-sets.md
@@ -0,0 +1,170 @@
+Resource Sets
+================
+
+Resource sets are collections of Kubernetes resources that should be passed to `kubectl` together.
+
+Technically a resource set is simply a folder with a few YAML and/or JSON templates in it.
+
+<!-- markdown-toc start - Don't edit this section. Run M-x markdown-toc-refresh-toc -->
+**Table of Contents**
+
+- [Resource Sets](#resource-sets)
+- [Creating resource sets](#creating-resource-sets)
+    - [Default variables](#default-variables)
+- [Including resource sets](#including-resource-sets)
+    - [Fields](#fields)
+        - [`name`](#name)
+        - [`path`](#path)
+        - [`values`](#values)
+        - [`args`](#args)
+        - [`include`](#include)
+    - [Multiple includes](#multiple-includes)
+    - [Nesting resource sets](#nesting-resource-sets)
+        - [Caveats](#caveats)
+
+<!-- markdown-toc end -->
+
+# Creating resource sets
+
+Simply create a folder in your Kontemplate repository and place a YAML or JSON file in it. These
+files get interpreted as [templates][] during Kontemplate runs and variables (as well as template
+logic or functions) will be interpolated.
+
+Refer to the template documentation for information on how to write templates.
+
+## Default variables
+
+Sometimes it is useful to specify default values for variables that should be interpolated during
+a run if the [cluster configuration][] does not specify a variable explicitly.
+
+This can be done simply by placing a `default.yaml` or `default.json` file in the resource set
+folder and filling it with key/value pairs of the intended default variables.
+
+Kontemplate will error during interpolation if any variables are left unspecified.
+
+# Including resource sets
+
+Under the cluster configuration `include` key resource sets are included and required variables
+are specified. For example:
+
+```yaml
+include:
+  - name: some-api
+    values:
+      version: 1.2-SNAPSHOT
+```
+
+This will include a resource set from a folder called `some-api` and set the specified `version` variable.
+
+## Fields
+
+The available fields when including a resource set are these:
+
+### `name`
+
+The `name` field contains the name of the resource set. This name can be used to refer to the resource set
+when specifying explicit includes or excludes during a run.
+
+By default it is assumed that the `name` is the path to the resource set folder, but this can be overridden.
+
+This field is **required**.
+
+### `path`
+
+The `path` field specifies an explicit path to a resource set folder in the case that it should differ from
+the resource set's `name`.
+
+This field is **optional**.
+
+### `values`
+
+The `values` field specifies key/values pairs of variables that should be available during templating.
+
+This field is **optional**.
+
+### `args`
+
+The `args` field specifies a list of arguments that should be passed to `kubectl`.
+
+This field is **optional**.
+
+### `include`
+
+The `include` field specifies additional resource sets that should be included and that should inherit the
+variables of this resource set.
+
+The fully qualified names of "nested" resource sets are set to `${PARENT_NAME}/${CHILD_NAME}` and paths are
+merged in the same way.
+
+This makes it easy to organise different resource sets as "groups" to include / exclude them collectively
+during runs.
+
+This field is **optional**.
+
+## Multiple includes
+
+Resource sets can be included multiple times with different configurations. In this case it is recommended
+to set the `path` and `name` fields explicitly. For example:
+
+```yaml
+include:
+  - name: forwarder-europe
+    path: tools/forwarder
+    values:
+      source: europe
+  - name: forwarder-asia
+    path: tools/forwarder
+    values:
+      source: asia
+```
+
+The two different configurations can be referred to by their set names, but will use the same resource
+templates with different configurations.
+
+## Nesting resource sets
+
+As mentioned above for the `include` field, resource sets can be nested. This lets users group resource
+sets in logical ways using simple folder structures.
+
+Assuming a folder structure like:
+
+```
+├── backend
+│   ├── auth-api
+│   ├── message-api
+│   └── order-api
+└── frontend
+    ├── app-page
+    └── login-page
+```
+
+With each of these folders being a resource set, they could be included in a cluster configuration like so:
+
+```yaml
+include:
+  - name: backend
+    include:
+      - name: auth-api
+      - name: message-api
+      - name: order-api
+  - name: frontend:
+    include:
+      - name: app-page
+      - name: login-page
+```
+
+Kontemplate could then be run with, for example, `--include backend` to only include the resource sets nested
+in the backend group. Specific resource sets can also be targeted, for example as `--include backend/order-api`.
+
+Variables specified in the parent resource set are inherited by the children.
+
+### Caveats
+
+Two caveats apply that users should be aware of:
+
+1. The parent resource set can not contain any resource templates itself.
+
+2. Only one level of nesting is supported. Specifying `include` again on a nested resource set will be ignored.
+
+[templates]: templates.md
+[cluster configuration]: cluster-config.md
diff --git a/ops/kontemplate/docs/templates.md b/ops/kontemplate/docs/templates.md
new file mode 100644
index 000000000000..32da205108de
--- /dev/null
+++ b/ops/kontemplate/docs/templates.md
@@ -0,0 +1,153 @@
+Kontemplate templates
+=====================
+
+The template file format is based on Go's [templating engine][] in combination
+with a small extension library called [sprig][] that adds additional template
+functions.
+
+Go templates can either simply display variables or build more complicated
+*pipelines* in which variables are passed to functions for further processing,
+or in which conditionals are evaluated for more complex template logic.
+
+It is recommended that you check out the Golang [documentation][] for the templating
+engine in addition to the cherry-picked features listed here.
+
+<!-- markdown-toc start - Don't edit this section. Run M-x markdown-toc-refresh-toc -->
+**Table of Contents**
+
+- [Kontemplate templates](#kontemplate-templates)
+    - [Basic variable interpolation](#basic-variable-interpolation)
+        - [Example:](#example)
+    - [Template functions](#template-functions)
+    - [Examples:](#examples)
+    - [Conditionals & ranges](#conditionals--ranges)
+    - [Caveats](#caveats)
+
+<!-- markdown-toc end -->
+
+## Basic variable interpolation
+
+The basic template format uses `{{ .variableName }}` as the interpolation format.
+
+### Example:
+
+Assuming that you include a resource set as such:
+
+```
+- name: api-gateway
+  values:
+    internalHost: http://my-internal-host/
+```
+
+And the api-gateway resource set includes a ConfigMap (some fields left out for
+the example):
+
+```
+# api-gateway/configmap.yaml:
+---
+kind: ConfigMap
+metadata:
+  name: api-gateway-config
+data:
+  internalHost: {{ .internalHost }}
+```
+
+The resulting output will be:
+
+```
+
+---
+kind: ConfigMap
+metadata:
+  name: api-gateway-config
+data:
+  internalHost: http://my-internal-host/
+```
+
+## Template functions
+
+Go templates support template functions which you can think of as a sort of
+shell-like pipeline where text flows through transformations from left to
+right.
+
+Some template functions come from Go's standard library and are listed in the
+[Go documentation][]. In addition the functions declared by [sprig][] are
+available in kontemplate, as well as five custom functions:
+
+* `json`: Encodes any supplied data structure as JSON.
+* `gitHEAD`: Retrieves the commit hash at Git `HEAD`.
+* `passLookup`: Looks up the supplied key in [pass][].
+* `insertFile`: Insert the contents of the given file in the resource
+  set folder as a string.
+* `insertTemplate`: Insert the contents of the given template in the resource
+  set folder as a string.
+
+## Examples:
+
+```
+# With the following values:
+name: Donald
+certKeyPath: my-website/cert-key
+
+# The following interpolations are possible:
+
+{{ .name | upper }}
+-> DONALD
+
+{{ .name | upper | repeat 2 }}
+-> DONALD DONALD
+
+{{ .certKeyPath | passLookup }}
+-> Returns content of 'my-website/cert-key' from pass
+
+{{ gitHEAD }}
+-> Returns the Git commit hash at HEAD.
+```
+
+## Conditionals & ranges
+
+Some logic is supported in Golang templates and can be used in Kontemplate, too.
+
+With the following values:
+
+```
+useKube2IAM: true
+servicePorts:
+  - 8080
+  - 9090
+```
+
+The following interpolations are possible:
+
+```
+# Conditionally insert something in the template:
+metadata:
+  annotations:
+    foo: bar
+    {{ if .useKube2IAM -}} iam.amazonaws.com/role: my-api {{- end }}
+```
+
+```
+# Iterate over a list of values
+ports:
+  {{ range .servicePorts }}
+  - port: {{ . }}
+  {{ end }}
+```
+
+Check out the Golang documentation (linked above) for more information about template logic.
+
+## Caveats
+
+Kontemplate does not by itself parse any of the content of the templates, which
+means that it does not validate whether the resources you supply are valid YAML
+or JSON.
+
+You can perform some validation by using `kontemplate apply --dry-run` which
+will make use of the Dry-Run functionality in `kubectl`.
+
+[templating engine]: https://golang.org/pkg/text/template/
+[documentation]: https://golang.org/pkg/text/template/
+[sprig]: http://masterminds.github.io/sprig/
+[Go documentation]: https://golang.org/pkg/text/template/#hdr-Functions
+[pass]: https://www.passwordstore.org/
diff --git a/ops/kontemplate/docs/tips-and-tricks.md b/ops/kontemplate/docs/tips-and-tricks.md
new file mode 100644
index 000000000000..5401ac91e5a3
--- /dev/null
+++ b/ops/kontemplate/docs/tips-and-tricks.md
@@ -0,0 +1,77 @@
+Kontemplate tips & tricks
+=========================
+
+<!-- markdown-toc start - Don't edit this section. Run M-x markdown-toc-refresh-toc -->
+**Table of Contents**
+
+- [Kontemplate tips & tricks](#kontemplate-tips--tricks)
+    - [Update Deployments when ConfigMaps change](#update-deployments-when-configmaps-change)
+    - [direnv & pass](#direnv--pass)
+
+<!-- markdown-toc end -->
+
+## Update Deployments when ConfigMaps change
+
+Kubernetes does [not currently][] have the ability to perform rolling updates
+of Deployments and other resource types when `ConfigMap` or `Secret` objects
+are updated.
+
+It is possible to make use of annotations and templating functions in
+Kontemplate to force updates to these resources anyways.
+ 
+For example:
+
+```yaml
+# A ConfigMap that contains some configuration for your app
+---
+kind: ConfigMap
+metadata:
+  name: app-config
+data:
+  app.conf: |
+    name: {{ .appName }}
+    foo: bar
+```
+
+Now whenever the `appName` variable changes or we make an edit to the
+`ConfigMap` we would like to update the `Deployment` making use of it, too. We
+can do this by adding a hash of the parsed template to the annotations of the
+created `Pod` objects:
+
+```yaml
+
+---
+kind: Deployment
+metadata:
+  name: app
+spec:
+  template:
+    metadata:
+      annotations:
+        configHash: {{ insertTemplate "app-config.yaml" | sha256sum }}
+    spec:
+      containers:
+        - name: app
+          # Some details omitted ... 
+          volumeMounts:
+            - name: config
+              mountPath: /etc/app/
+      volumes:
+        - name: config
+          configMap:
+            name: app-config
+```
+
+Now any change to the `ConfigMap` - either by directly editing the yaml file or
+via a changed template variable - will cause the annotation to change,
+triggering a rolling update of all relevant pods.
+
+## direnv & pass
+
+Users of `pass` may have multiple different password stores on their machines.
+Assuming that `kontemplate` configuration exists somewhere on the filesystem
+per project, it is easy to use [direnv][] to switch to the correct
+`PASSWORD_STORE_DIR` variable when entering the folder.
+
+[not currently]: https://github.com/kubernetes/kubernetes/issues/22368
+[direnv]: https://direnv.net/
diff --git a/ops/kontemplate/example/other-config.yaml b/ops/kontemplate/example/other-config.yaml
new file mode 100644
index 000000000000..87370569c46e
--- /dev/null
+++ b/ops/kontemplate/example/other-config.yaml
@@ -0,0 +1,7 @@
+---
+apiVersion: extensions/v1beta1
+kind: ConfigMap
+metadata:
+  name: other-config
+data:
+  globalData: {{ .globalVar }}
diff --git a/ops/kontemplate/example/prod-cluster.json b/ops/kontemplate/example/prod-cluster.json
new file mode 100644
index 000000000000..70e2365f1710
--- /dev/null
+++ b/ops/kontemplate/example/prod-cluster.json
@@ -0,0 +1,16 @@
+{
+  "context": "k8s.prod.mydomain.com",
+  "global": {
+    "globalVar": "lizards"
+  },
+  "include": [
+    {
+      "name": "some-api",
+      "values": {
+        "version": "1.0-SNAPSHOT-0e6884d",
+        "importantFeature": true,
+        "apiPort": 4567
+      }
+    }
+  ]
+}
diff --git a/ops/kontemplate/example/prod-cluster.yaml b/ops/kontemplate/example/prod-cluster.yaml
new file mode 100644
index 000000000000..9f300a492080
--- /dev/null
+++ b/ops/kontemplate/example/prod-cluster.yaml
@@ -0,0 +1,17 @@
+---
+context: k8s.prod.mydomain.com
+global:
+  globalVar: lizards
+include:
+  # By default resource sets are included from a folder with the same
+  # name as the resource set's name
+  - name: some-api
+    values:
+      version: 1.0-0e6884d
+      importantFeature: true
+      apiPort: 4567
+
+  # Paths can also be specified manually (and point at single template
+  # files!)
+  - name: other-config
+    path: other-config.yaml
diff --git a/ops/kontemplate/example/some-api/some-api.yaml b/ops/kontemplate/example/some-api/some-api.yaml
new file mode 100644
index 000000000000..f0188f9dbde3
--- /dev/null
+++ b/ops/kontemplate/example/some-api/some-api.yaml
@@ -0,0 +1,52 @@
+---
+apiVersion: v1
+kind: Secret
+metadata:
+  name: secret-certificate
+data:
+  cert.pem: {{ passLookup "my/secret/certificate" | b64enc }}
+---
+apiVersion: extensions/v1beta1
+kind: ConfigMap
+metadata:
+  name: some-config
+data:
+  # The content of the example configuration file is templated in here
+  # by the 'insertFile' function and indented for YAML-compatibility
+  # with the 'indent' function:
+  some.cfg: |
+{{ insertFile "some.cfg" | indent 4 }}
+---
+apiVersion: extensions/v1beta1
+kind: Deployment
+metadata:
+  name: some-api
+spec:
+  replicas: 1
+  template:
+    metadata:
+      labels:
+        app: some-api
+    spec:
+      containers:
+        - image: my.container.repo/some-api:{{ .version }}
+          name: some-api
+          env:
+            - name: ENABLE_IMPORTANT_FEATURE
+              value: {{ .importantFeature }}
+            - name: SOME_GLOBAL_VAR
+              value: {{ .globalVar }}
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: some-api
+  labels:
+    app: some-api
+spec:
+  selector:
+    app: some-api
+  ports:
+    - port: 80
+      targetPort: {{ .apiPort }}
+      name: http
diff --git a/ops/kontemplate/example/some-api/some.cfg b/ops/kontemplate/example/some-api/some.cfg
new file mode 100644
index 000000000000..733d5e16789a
--- /dev/null
+++ b/ops/kontemplate/example/some-api/some.cfg
@@ -0,0 +1,4 @@
+{
+  "something": 1542,
+  "other-thing": "да"
+}
diff --git a/ops/kontemplate/image/Dockerfile b/ops/kontemplate/image/Dockerfile
new file mode 100644
index 000000000000..a40fa83b0867
--- /dev/null
+++ b/ops/kontemplate/image/Dockerfile
@@ -0,0 +1,15 @@
+FROM alpine:3.10
+
+ADD hashes /root/hashes
+ADD https://storage.googleapis.com/kubernetes-release/release/v1.15.3/bin/linux/amd64/kubectl /usr/bin/kubectl
+ADD https://github.com/tazjin/kontemplate/releases/download/v1.8.0/kontemplate-1.8.0-6c3b299-linux-amd64.tar.gz /tmp/kontemplate.tar.gz
+
+# Pass release version is 1.7.3
+ADD https://raw.githubusercontent.com/zx2c4/password-store/74fdfb5022f317ad48d449e29543710bdad1afda/src/password-store.sh /usr/bin/pass
+
+RUN sha256sum -c /root/hashes && \
+    apk add -U bash tree gnupg git && \
+    chmod +x /usr/bin/kubectl /usr/bin/pass && \
+    tar xzvf /tmp/kontemplate.tar.gz && \
+    mv kontemplate /usr/bin/kontemplate && \
+    /usr/bin/kontemplate version
diff --git a/ops/kontemplate/image/README.md b/ops/kontemplate/image/README.md
new file mode 100644
index 000000000000..fe04765401be
--- /dev/null
+++ b/ops/kontemplate/image/README.md
@@ -0,0 +1,12 @@
+Kontemplate Docker image
+========================
+
+This builds a simple Docker image available on the Docker Hub as `tazjin/kontemplate`.
+
+Builds are automated based on the Dockerfile contained here.
+
+It contains both `kontemplate` and `kubectl` and can be used as part of container-based
+CI pipelines.
+
+`pass` and its dependencies are also installed to enable the use of the `passLookup`
+template function if desired.
diff --git a/ops/kontemplate/image/hashes b/ops/kontemplate/image/hashes
new file mode 100644
index 000000000000..bfd87c0201e7
--- /dev/null
+++ b/ops/kontemplate/image/hashes
@@ -0,0 +1,2 @@
+a39dfdd77e4655acaabe301285cf389cb5fc8145060f5677dc93db1cc20911a4  /tmp/kontemplate.tar.gz
+6e805054a1fb2280abb53f75b57a1b92bf9c66ffe0d2cdcd46e81b079d93c322  /usr/bin/kubectl
diff --git a/ops/kontemplate/main.go b/ops/kontemplate/main.go
new file mode 100644
index 000000000000..e55d42465c6b
--- /dev/null
+++ b/ops/kontemplate/main.go
@@ -0,0 +1,242 @@
+// Copyright (C) 2016-2019  Vincent Ambo <mail@tazj.in>
+//
+// Kontemplate is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package main
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+	"strings"
+
+	"github.com/tazjin/kontemplate/context"
+	"github.com/tazjin/kontemplate/templater"
+	"gopkg.in/alecthomas/kingpin.v2"
+)
+
+const version string = "1.8.0"
+
+// This variable will be initialised by the Go linker during the builder
+var gitHash string
+
+var (
+	app = kingpin.New("kontemplate", "simple Kubernetes resource templating")
+
+	// Global flags
+	includes   = app.Flag("include", "Resource sets to include explicitly").Short('i').Strings()
+	excludes   = app.Flag("exclude", "Resource sets to exclude explicitly").Short('e').Strings()
+	variables  = app.Flag("var", "Provide variables to templates explicitly").Strings()
+	kubectlBin = app.Flag("kubectl", "Path to the kubectl binary (default 'kubectl')").Default("kubectl").String()
+
+	// Commands
+	template          = app.Command("template", "Template resource sets and print them")
+	templateFile      = template.Arg("file", "Cluster configuration file to use").Required().String()
+	templateOutputDir = template.Flag("output", "Output directory in which to save templated files instead of printing them").Short('o').String()
+
+	apply       = app.Command("apply", "Template resources and pass to 'kubectl apply'")
+	applyFile   = apply.Arg("file", "Cluster configuration file to use").Required().String()
+	applyDryRun = apply.Flag("dry-run", "Print remote operations without executing them").Default("false").Bool()
+
+	replace     = app.Command("replace", "Template resources and pass to 'kubectl replace'")
+	replaceFile = replace.Arg("file", "Cluster configuration file to use").Required().String()
+
+	delete     = app.Command("delete", "Template resources and pass to 'kubectl delete'")
+	deleteFile = delete.Arg("file", "Cluster configuration file to use").Required().String()
+
+	create     = app.Command("create", "Template resources and pass to 'kubectl create'")
+	createFile = create.Arg("file", "Cluster configuration file to use").Required().String()
+
+	versionCmd = app.Command("version", "Show kontemplate version")
+)
+
+func main() {
+	app.HelpFlag.Short('h')
+
+	switch kingpin.MustParse(app.Parse(os.Args[1:])) {
+	case template.FullCommand():
+		templateCommand()
+
+	case apply.FullCommand():
+		applyCommand()
+
+	case replace.FullCommand():
+		replaceCommand()
+
+	case delete.FullCommand():
+		deleteCommand()
+
+	case create.FullCommand():
+		createCommand()
+
+	case versionCmd.FullCommand():
+		versionCommand()
+	}
+}
+
+func versionCommand() {
+	if gitHash == "" {
+		fmt.Printf("Kontemplate version %s (git commit unknown)\n", version)
+	} else {
+		fmt.Printf("Kontemplate version %s (git commit: %s)\n", version, gitHash)
+	}
+}
+
+func templateCommand() {
+	_, resourceSets := loadContextAndResources(templateFile)
+
+	for _, rs := range *resourceSets {
+		if len(rs.Resources) == 0 {
+			fmt.Fprintf(os.Stderr, "Warning: Resource set '%s' does not exist or contains no valid templates\n", rs.Name)
+			continue
+		}
+
+		if *templateOutputDir != "" {
+			templateIntoDirectory(templateOutputDir, rs)
+		} else {
+			for _, r := range rs.Resources {
+				fmt.Fprintf(os.Stderr, "Rendered file %s/%s:\n", rs.Name, r.Filename)
+				fmt.Println(r.Rendered)
+			}
+		}
+	}
+}
+
+func templateIntoDirectory(outputDir *string, rs templater.RenderedResourceSet) {
+	// Attempt to create the output directory if it does not
+	// already exist:
+	if err := os.MkdirAll(*templateOutputDir, 0775); err != nil {
+		app.Fatalf("Could not create output directory: %v\n", err)
+	}
+
+	// Nested resource sets may contain slashes in their names.
+	// These are replaced with dashes for the purpose of writing a
+	// flat list of output files:
+	setName := strings.Replace(rs.Name, "/", "-", -1)
+
+	for _, r := range rs.Resources {
+		filename := fmt.Sprintf("%s/%s-%s", *templateOutputDir, setName, r.Filename)
+		fmt.Fprintf(os.Stderr, "Writing file %s\n", filename)
+
+		file, err := os.Create(filename)
+		if err != nil {
+			app.Fatalf("Could not create file %s: %v\n", filename, err)
+		}
+
+		_, err = fmt.Fprintf(file, r.Rendered)
+		if err != nil {
+			app.Fatalf("Error writing file %s: %v\n", filename, err)
+		}
+	}
+}
+
+func applyCommand() {
+	ctx, resources := loadContextAndResources(applyFile)
+
+	var kubectlArgs []string
+
+	if *applyDryRun {
+		kubectlArgs = []string{"apply", "-f", "-", "--dry-run"}
+	} else {
+		kubectlArgs = []string{"apply", "-f", "-"}
+	}
+
+	if err := runKubectlWithResources(ctx, &kubectlArgs, resources); err != nil {
+		failWithKubectlError(err)
+	}
+}
+
+func replaceCommand() {
+	ctx, resources := loadContextAndResources(replaceFile)
+	args := []string{"replace", "--save-config=true", "-f", "-"}
+
+	if err := runKubectlWithResources(ctx, &args, resources); err != nil {
+		failWithKubectlError(err)
+	}
+}
+
+func deleteCommand() {
+	ctx, resources := loadContextAndResources(deleteFile)
+	args := []string{"delete", "-f", "-"}
+
+	if err := runKubectlWithResources(ctx, &args, resources); err != nil {
+		failWithKubectlError(err)
+	}
+}
+
+func createCommand() {
+	ctx, resources := loadContextAndResources(createFile)
+	args := []string{"create", "--save-config=true", "-f", "-"}
+
+	if err := runKubectlWithResources(ctx, &args, resources); err != nil {
+		failWithKubectlError(err)
+	}
+}
+
+func loadContextAndResources(file *string) (*context.Context, *[]templater.RenderedResourceSet) {
+	ctx, err := context.LoadContext(*file, variables)
+	if err != nil {
+		app.Fatalf("Error loading context: %v\n", err)
+	}
+
+	resources, err := templater.LoadAndApplyTemplates(includes, excludes, ctx)
+	if err != nil {
+		app.Fatalf("Error templating resource sets: %v\n", err)
+	}
+
+	return ctx, &resources
+}
+
+func runKubectlWithResources(c *context.Context, kubectlArgs *[]string, resourceSets *[]templater.RenderedResourceSet) error {
+	argsWithContext := append(*kubectlArgs, fmt.Sprintf("--context=%s", c.Name))
+
+	for _, rs := range *resourceSets {
+		if len(rs.Resources) == 0 {
+			fmt.Fprintf(os.Stderr, "Warning: Resource set '%s' contains no valid templates\n", rs.Name)
+			continue
+		}
+
+		argsWithResourceSetArgs := append(argsWithContext, rs.Args...)
+
+		kubectl := exec.Command(*kubectlBin, argsWithResourceSetArgs...)
+
+		stdin, err := kubectl.StdinPipe()
+		if err != nil {
+			return fmt.Errorf("kubectl error: %v", err)
+		}
+
+		kubectl.Stdout = os.Stdout
+		kubectl.Stderr = os.Stderr
+
+		if err = kubectl.Start(); err != nil {
+			return fmt.Errorf("kubectl error: %v", err)
+		}
+
+		for _, r := range rs.Resources {
+			fmt.Printf("Passing file %s/%s to kubectl\n", rs.Name, r.Filename)
+			fmt.Fprintln(stdin, r.Rendered)
+		}
+		stdin.Close()
+
+		if err = kubectl.Wait(); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func failWithKubectlError(err error) {
+	app.Fatalf("Kubectl error: %v\n", err)
+}
diff --git a/ops/kontemplate/release.nix b/ops/kontemplate/release.nix
new file mode 100644
index 000000000000..6a3dbd5efe87
--- /dev/null
+++ b/ops/kontemplate/release.nix
@@ -0,0 +1,58 @@
+# Copyright (C) 2016-2019  Vincent Ambo <mail@tazj.in>
+#
+# This file is part of Kontemplate.
+#
+# Kontemplate is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This file is the Nix derivation used to build release binaries for
+# several different architectures and operating systems.
+
+let
+  pkgs = import
+    ((import <nixpkgs> { }).fetchFromGitHub {
+      owner = "NixOS";
+      repo = "nixpkgs-channels";
+      rev = "541d9cce8af7a490fb9085305939569567cb58e6";
+      sha256 = "0jgz72hhzkd5vyq5v69vpljjlnf0lqaz7fh327bvb3cvmwbfxrja";
+    })
+    { };
+in
+with pkgs; buildGoPackage rec {
+  name = "kontemplate-${version}";
+  version = "canon";
+  src = ./.;
+  goPackagePath = "github.com/tazjin/kontemplate";
+  goDeps = ./deps.nix;
+
+  # This configuration enables the building of statically linked
+  # executables. For some reason, those will have multiple references
+  # to the Go compiler's installation path in them, which is the
+  # reason for setting the 'allowGoReference' flag.
+  dontStrip = true; # Linker configuration handles stripping
+  allowGoReference = true;
+  CGO_ENABLED = "0";
+  GOCACHE = "off";
+
+  # Configure release builds via the "build-matrix" script:
+  buildInputs = [ git ];
+  buildPhase = ''
+    cd go/src/${goPackagePath}
+    patchShebangs build-release.sh
+    ./build-release.sh build
+  '';
+
+  outputs = [ "out" ];
+  installPhase = ''
+    mkdir $out
+    cp -r release/ $out
+  '';
+
+  meta = with lib; {
+    description = "A resource templating helper for Kubernetes";
+    homepage = "http://kontemplate.works/";
+    license = licenses.gpl3;
+  };
+}
diff --git a/ops/kontemplate/templater/dns.go b/ops/kontemplate/templater/dns.go
new file mode 100644
index 000000000000..6cd974dd9324
--- /dev/null
+++ b/ops/kontemplate/templater/dns.go
@@ -0,0 +1,35 @@
+// Copyright (C) 2016-2019  Vincent Ambo <mail@tazj.in>
+//
+// This file is part of Kontemplate.
+//
+// Kontemplate is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This file contains the implementation of a template function for retrieving
+// IP addresses from DNS
+
+package templater
+
+import (
+	"fmt"
+	"net"
+	"os"
+)
+
+func GetIPsFromDNS(host string) ([]interface{}, error) {
+	fmt.Fprintf(os.Stderr, "Attempting to look up IP for %s in DNS\n", host)
+	ips, err := net.LookupIP(host)
+
+	if err != nil {
+		return nil, fmt.Errorf("IP address lookup failed: %v", err)
+	}
+
+	var result []interface{} = make([]interface{}, len(ips))
+	for i, ip := range ips {
+		result[i] = ip
+	}
+
+	return result, nil
+}
diff --git a/ops/kontemplate/templater/pass.go b/ops/kontemplate/templater/pass.go
new file mode 100644
index 000000000000..f7fbcb433de5
--- /dev/null
+++ b/ops/kontemplate/templater/pass.go
@@ -0,0 +1,34 @@
+// Copyright (C) 2016-2019  Vincent Ambo <mail@tazj.in>
+//
+// This file is part of Kontemplate.
+//
+// Kontemplate is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This file contains the implementation of a template function for retrieving
+// variables from 'pass', the standard UNIX password manager.
+
+package templater
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+	"strings"
+)
+
+func GetFromPass(key string) (string, error) {
+	fmt.Fprintf(os.Stderr, "Attempting to look up %s in pass\n", key)
+	pass := exec.Command("pass", "show", key)
+
+	output, err := pass.CombinedOutput()
+	if err != nil {
+		return "", fmt.Errorf("Pass lookup failed: %s (%v)", output, err)
+	}
+
+	trimmed := strings.TrimSpace(string(output))
+
+	return trimmed, nil
+}
diff --git a/ops/kontemplate/templater/templater.go b/ops/kontemplate/templater/templater.go
new file mode 100644
index 000000000000..a8f0c670a603
--- /dev/null
+++ b/ops/kontemplate/templater/templater.go
@@ -0,0 +1,236 @@
+// Copyright (C) 2016-2019  Vincent Ambo <mail@tazj.in>
+//
+// This file is part of Kontemplate.
+//
+// Kontemplate is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+package templater
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"os"
+	"os/exec"
+	"path"
+	"strings"
+	"text/template"
+
+	"github.com/Masterminds/sprig"
+	"github.com/tazjin/kontemplate/context"
+	"github.com/tazjin/kontemplate/util"
+)
+
+const failOnMissingKeys string = "missingkey=error"
+
+type RenderedResource struct {
+	Filename string
+	Rendered string
+}
+
+type RenderedResourceSet struct {
+	Name      string
+	Resources []RenderedResource
+	Args      []string
+}
+
+func LoadAndApplyTemplates(include *[]string, exclude *[]string, c *context.Context) ([]RenderedResourceSet, error) {
+	limitedResourceSets := applyLimits(&c.ResourceSets, include, exclude)
+	renderedResourceSets := make([]RenderedResourceSet, 0)
+
+	if len(*limitedResourceSets) == 0 {
+		return renderedResourceSets, fmt.Errorf("No valid resource sets included!")
+	}
+
+	for _, rs := range *limitedResourceSets {
+		set, err := processResourceSet(c, &rs)
+
+		if err != nil {
+			return nil, err
+		}
+
+		renderedResourceSets = append(renderedResourceSets, *set)
+	}
+
+	return renderedResourceSets, nil
+}
+
+func processResourceSet(ctx *context.Context, rs *context.ResourceSet) (*RenderedResourceSet, error) {
+	fmt.Fprintf(os.Stderr, "Loading resources for %s\n", rs.Name)
+
+	fileInfo, err := os.Stat(rs.Path)
+	if err != nil {
+		return nil, err
+	}
+
+	var files []os.FileInfo
+	var resources []RenderedResource
+
+	// Treat single-file resource paths separately from resource
+	// sets containing multiple templates
+	if fileInfo.IsDir() {
+		// Explicitly discard this error, which will give us an empty
+		// list of files instead.
+		// This will end up printing a warning to the user, but it
+		// won't stop the rest of the process.
+		files, _ = ioutil.ReadDir(rs.Path)
+		resources, err = processFiles(ctx, rs, files)
+		if err != nil {
+			return nil, err
+		}
+	} else {
+		resource, err := templateFile(ctx, rs, rs.Path)
+		if err != nil {
+			return nil, err
+		}
+
+		resources = []RenderedResource{resource}
+	}
+
+	return &RenderedResourceSet{
+		Name:      rs.Name,
+		Resources: resources,
+		Args:      rs.Args,
+	}, nil
+}
+
+func processFiles(ctx *context.Context, rs *context.ResourceSet, files []os.FileInfo) ([]RenderedResource, error) {
+	resources := make([]RenderedResource, 0)
+
+	for _, file := range files {
+		if !file.IsDir() && isResourceFile(file) {
+			path := path.Join(rs.Path, file.Name())
+			res, err := templateFile(ctx, rs, path)
+
+			if err != nil {
+				return resources, err
+			}
+
+			resources = append(resources, res)
+		}
+	}
+
+	return resources, nil
+}
+
+func templateFile(ctx *context.Context, rs *context.ResourceSet, filepath string) (RenderedResource, error) {
+	var resource RenderedResource
+
+	tpl, err := template.New(path.Base(filepath)).Funcs(templateFuncs(ctx, rs)).Option(failOnMissingKeys).ParseFiles(filepath)
+	if err != nil {
+		return resource, fmt.Errorf("Could not load template %s: %v", filepath, err)
+	}
+
+	var b bytes.Buffer
+	err = tpl.Execute(&b, rs.Values)
+	if err != nil {
+		return resource, fmt.Errorf("Error while templating %s: %v", filepath, err)
+	}
+
+	resource = RenderedResource{
+		Filename: path.Base(filepath),
+		Rendered: b.String(),
+	}
+
+	return resource, nil
+}
+
+// Applies the limits of explicitly included or excluded resources and returns the updated resource set.
+// Exclude takes priority over include
+func applyLimits(rs *[]context.ResourceSet, include *[]string, exclude *[]string) *[]context.ResourceSet {
+	if len(*include) == 0 && len(*exclude) == 0 {
+		return rs
+	}
+
+	// Exclude excluded resource sets
+	excluded := make([]context.ResourceSet, 0)
+	for _, r := range *rs {
+		if !matchesResourceSet(exclude, &r) {
+			excluded = append(excluded, r)
+		}
+	}
+
+	// Include included resource sets
+	if len(*include) == 0 {
+		return &excluded
+	}
+	included := make([]context.ResourceSet, 0)
+	for _, r := range excluded {
+		if matchesResourceSet(include, &r) {
+			included = append(included, r)
+		}
+	}
+
+	return &included
+}
+
+// Check whether an include/exclude string slice matches a resource set
+func matchesResourceSet(s *[]string, rs *context.ResourceSet) bool {
+	for _, r := range *s {
+		r = strings.TrimSuffix(r, "/")
+		if r == rs.Name || r == rs.Parent {
+			return true
+		}
+	}
+
+	return false
+}
+
+func templateFuncs(c *context.Context, rs *context.ResourceSet) template.FuncMap {
+	m := sprig.TxtFuncMap()
+	m["json"] = func(data interface{}) string {
+		b, _ := json.Marshal(data)
+		return string(b)
+	}
+	m["passLookup"] = GetFromPass
+	m["gitHEAD"] = func() (string, error) {
+		out, err := exec.Command("git", "-C", c.BaseDir, "rev-parse", "HEAD").Output()
+		if err != nil {
+			return "", err
+		}
+		output := strings.TrimSpace(string(out))
+		return output, nil
+	}
+	m["lookupIPAddr"] = GetIPsFromDNS
+	m["insertFile"] = func(file string) (string, error) {
+		data, err := ioutil.ReadFile(path.Join(rs.Path, file))
+		if err != nil {
+			return "", err
+		}
+
+		return string(data), nil
+	}
+	m["insertTemplate"] = func(file string) (string, error) {
+		data, err := templateFile(c, rs, path.Join(rs.Path, file))
+		if err != nil {
+			return "", err
+		}
+
+		return data.Rendered, nil
+	}
+	m["default"] = func(defaultVal interface{}, varName string) interface{} {
+		if val, ok := rs.Values[varName]; ok {
+			return val
+		}
+
+		return defaultVal
+	}
+	return m
+}
+
+// Checks whether a file is a resource file (i.e. is YAML or JSON) and not a default values file.
+func isResourceFile(f os.FileInfo) bool {
+	for _, defaultFile := range util.DefaultFilenames {
+		if f.Name() == defaultFile {
+			return false
+		}
+	}
+
+	return strings.HasSuffix(f.Name(), "yaml") ||
+		strings.HasSuffix(f.Name(), "yml") ||
+		strings.HasSuffix(f.Name(), "json")
+}
diff --git a/ops/kontemplate/templater/templater_test.go b/ops/kontemplate/templater/templater_test.go
new file mode 100644
index 000000000000..9d9fc8d1ffa7
--- /dev/null
+++ b/ops/kontemplate/templater/templater_test.go
@@ -0,0 +1,205 @@
+// Copyright (C) 2016-2019  Vincent Ambo <mail@tazj.in>
+//
+// This file is part of Kontemplate.
+//
+// Kontemplate is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+package templater
+
+import (
+	"github.com/tazjin/kontemplate/context"
+	"reflect"
+	"strings"
+	"testing"
+)
+
+func TestApplyNoLimits(t *testing.T) {
+	resources := []context.ResourceSet{
+		{
+			Name: "testResourceSet1",
+		},
+		{
+			Name: "testResourceSet2",
+		},
+	}
+
+	result := applyLimits(&resources, &[]string{}, &[]string{})
+
+	if !reflect.DeepEqual(resources, *result) {
+		t.Error("Resource set slice changed, but shouldn't have.")
+		t.Errorf("Expected: %v\nResult: %v\n", resources, *result)
+		t.Fail()
+	}
+}
+
+func TestApplyIncludeLimits(t *testing.T) {
+	resources := []context.ResourceSet{
+		{
+			Name: "testResourceSet1",
+		},
+		{
+			Name: "testResourceSet2",
+		},
+		{
+			Name:   "testResourceSet3",
+			Parent: "included",
+		},
+	}
+
+	includes := []string{"testResourceSet1", "included"}
+
+	result := applyLimits(&resources, &includes, &[]string{})
+
+	expected := []context.ResourceSet{
+		{
+			Name: "testResourceSet1",
+		},
+		{
+			Name:   "testResourceSet3",
+			Parent: "included",
+		},
+	}
+
+	if !reflect.DeepEqual(expected, *result) {
+		t.Error("Result does not contain expected resource sets.")
+		t.Errorf("Expected: %v\nResult: %v\n", expected, *result)
+		t.Fail()
+	}
+}
+
+func TestApplyExcludeLimits(t *testing.T) {
+	resources := []context.ResourceSet{
+		{
+			Name: "testResourceSet1",
+		},
+		{
+			Name: "testResourceSet2",
+		},
+		{
+			Name:   "testResourceSet3",
+			Parent: "included",
+		},
+	}
+
+	exclude := []string{"testResourceSet2"}
+
+	result := applyLimits(&resources, &[]string{}, &exclude)
+
+	expected := []context.ResourceSet{
+		{
+			Name: "testResourceSet1",
+		},
+		{
+			Name:   "testResourceSet3",
+			Parent: "included",
+		},
+	}
+
+	if !reflect.DeepEqual(expected, *result) {
+		t.Error("Result does not contain expected resource sets.")
+		t.Errorf("Expected: %v\nResult: %v\n", expected, *result)
+		t.Fail()
+	}
+}
+
+func TestApplyLimitsExcludeIncludePrecedence(t *testing.T) {
+	resources := []context.ResourceSet{
+		{
+			Name:   "collection/nested1",
+			Parent: "collection",
+		},
+		{
+			Name:   "collection/nested2",
+			Parent: "collection",
+		},
+		{
+			Name:   "collection/nested3",
+			Parent: "collection",
+		},
+		{
+			Name: "something-else",
+		},
+	}
+
+	include := []string{"collection"}
+	exclude := []string{"collection/nested2"}
+
+	result := applyLimits(&resources, &include, &exclude)
+
+	expected := []context.ResourceSet{
+		{
+			Name:   "collection/nested1",
+			Parent: "collection",
+		},
+		{
+			Name:   "collection/nested3",
+			Parent: "collection",
+		},
+	}
+
+	if !reflect.DeepEqual(expected, *result) {
+		t.Error("Result does not contain expected resource sets.")
+		t.Errorf("Expected: %v\nResult: %v\n", expected, *result)
+		t.Fail()
+	}
+}
+
+func TestFailOnMissingKeys(t *testing.T) {
+	ctx := context.Context{}
+	resourceSet := context.ResourceSet{}
+
+	_, err := templateFile(&ctx, &resourceSet, "testdata/test-template.txt")
+
+	if err == nil {
+		t.Errorf("Template with missing keys should have failed.\n")
+		t.Fail()
+	}
+
+	if !strings.Contains(err.Error(), "map has no entry for key \"testName\"") {
+		t.Errorf("Templating failed with unexpected error: %v\n", err)
+	}
+}
+
+func TestDefaultTemplateFunction(t *testing.T) {
+	ctx := context.Context{}
+	resourceSet := context.ResourceSet{}
+
+	res, err := templateFile(&ctx, &resourceSet, "testdata/test-default.txt")
+
+	if err != nil {
+		t.Errorf("Templating with default values should have succeeded.\n")
+		t.Fail()
+	}
+
+	if res.Rendered != "defaultValue\n" {
+		t.Error("Result does not contain expected rendered default value.")
+		t.Fail()
+	}
+}
+
+func TestInsertTemplateFunction(t *testing.T) {
+	ctx := context.Context{}
+	resourceSet := context.ResourceSet{
+		Path: "testdata",
+		Values: map[string]interface{}{
+			"testName": "TestInsertTemplateFunction",
+		},
+	}
+
+	res, err := templateFile(&ctx, &resourceSet, "testdata/test-insertTemplate.txt")
+
+	if err != nil {
+		t.Error(err)
+		t.Errorf("Templating with an insertTemplate call should have succeeded.\n")
+		t.Fail()
+	}
+
+	if res.Rendered != "Inserting \"Template for test TestInsertTemplateFunction\".\n" {
+		t.Error("Result does not contain expected rendered template value.")
+		t.Error(res.Rendered)
+		t.Fail()
+	}
+}
diff --git a/ops/kontemplate/templater/testdata/test-default.txt b/ops/kontemplate/templater/testdata/test-default.txt
new file mode 100644
index 000000000000..4f7997bd69d2
--- /dev/null
+++ b/ops/kontemplate/templater/testdata/test-default.txt
@@ -0,0 +1 @@
+{{ default "defaultValue" "missingVar" }}
diff --git a/ops/kontemplate/templater/testdata/test-insertTemplate.txt b/ops/kontemplate/templater/testdata/test-insertTemplate.txt
new file mode 100644
index 000000000000..8155e174fe00
--- /dev/null
+++ b/ops/kontemplate/templater/testdata/test-insertTemplate.txt
@@ -0,0 +1 @@
+Inserting "{{ insertTemplate "test-template.txt" | trim }}".
diff --git a/ops/kontemplate/templater/testdata/test-template.txt b/ops/kontemplate/templater/testdata/test-template.txt
new file mode 100644
index 000000000000..06f1cfc630c3
--- /dev/null
+++ b/ops/kontemplate/templater/testdata/test-template.txt
@@ -0,0 +1 @@
+Template for test {{ .testName }}
diff --git a/ops/kontemplate/util/util.go b/ops/kontemplate/util/util.go
new file mode 100644
index 000000000000..56fa1e3fc9c5
--- /dev/null
+++ b/ops/kontemplate/util/util.go
@@ -0,0 +1,58 @@
+// Copyright (C) 2016-2019  Vincent Ambo <mail@tazj.in>
+//
+// This file is part of Kontemplate.
+//
+// Kontemplate is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+package util
+
+import (
+	"io/ioutil"
+
+	"github.com/ghodss/yaml"
+)
+
+// Filenames excluded from templating for the purpose of containing default variable values inside a resource set.
+var DefaultFilenames []string = []string{"default.yml", "default.yaml", "default.json"}
+
+// Merges two maps together. Values from the second map override values in the first map.
+// The returned map is new if anything was changed.
+func Merge(in1 *map[string]interface{}, in2 *map[string]interface{}) *map[string]interface{} {
+	if in1 == nil || len(*in1) == 0 {
+		return in2
+	}
+
+	if in2 == nil || len(*in2) == 0 {
+		return in1
+	}
+
+	new := make(map[string]interface{})
+	for k, v := range *in1 {
+		new[k] = v
+	}
+
+	for k, v := range *in2 {
+		new[k] = v
+	}
+
+	return &new
+}
+
+// Loads either a YAML or JSON file from the specified path and
+// deserialises it into the provided interface.
+func LoadData(filename string, addr interface{}) error {
+	file, err := ioutil.ReadFile(filename)
+	if err != nil {
+		return err
+	}
+
+	err = yaml.Unmarshal(file, addr)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
diff --git a/ops/kontemplate/util/util_test.go b/ops/kontemplate/util/util_test.go
new file mode 100644
index 000000000000..53c56081758c
--- /dev/null
+++ b/ops/kontemplate/util/util_test.go
@@ -0,0 +1,83 @@
+// Copyright (C) 2016-2019  Vincent Ambo <mail@tazj.in>
+//
+// This file is part of Kontemplate.
+//
+// Kontemplate is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+package util
+
+import (
+	"reflect"
+	"testing"
+)
+
+func TestMergeWithEmptyMap(t *testing.T) {
+	testMap := map[string]interface{}{
+		"foo": "bar",
+	}
+
+	empty := make(map[string]interface{})
+
+	res1 := Merge(&testMap, &empty)
+	res2 := Merge(&empty, &testMap)
+
+	if res1 != &testMap || res2 != &testMap {
+		t.Error("A new map was returned incorrectly.")
+		t.Fail()
+	}
+}
+
+func TestMergeWithNilMap(t *testing.T) {
+	testMap := map[string]interface{}{
+		"foo": "bar",
+	}
+
+	res1 := Merge(&testMap, nil)
+	res2 := Merge(nil, &testMap)
+
+	if res1 != &testMap || res2 != &testMap {
+		t.Error("A new map was returned incorrectly.")
+		t.Fail()
+	}
+}
+
+func TestMergeMaps(t *testing.T) {
+	map1 := map[string]interface{}{
+		"foo": "bar",
+	}
+
+	map2 := map[string]interface{}{
+		"bar": "baz",
+	}
+
+	result := Merge(&map1, &map2)
+	expected := map[string]interface{}{
+		"foo": "bar",
+		"bar": "baz",
+	}
+
+	if !reflect.DeepEqual(*result, expected) {
+		t.Error("Maps were merged incorrectly.")
+		t.Fail()
+	}
+}
+
+func TestMergeMapsPrecedence(t *testing.T) {
+	map1 := map[string]interface{}{
+		"foo": "incorrect",
+	}
+
+	map2 := map[string]interface{}{
+		"foo": "correct",
+	}
+
+	result := Merge(&map1, &map2)
+
+	if (*result)["foo"] != "correct" {
+		t.Error("Map merge precedence test failed.")
+		t.Fail()
+	}
+}
diff --git a/ops/machines/all-systems.nix b/ops/machines/all-systems.nix
new file mode 100644
index 000000000000..e59187cabbf8
--- /dev/null
+++ b/ops/machines/all-systems.nix
@@ -0,0 +1,24 @@
+{ depot, ... }:
+
+(with depot.ops.machines; [
+  sanduny
+  whitby
+]) ++
+
+(with depot.users.tazjin.nixos; [
+  camden
+  frog
+  tverskoy
+  zamalek
+]) ++
+
+(with depot.users.grfn.system.system; [
+  yeren
+  mugwump
+]) ++
+
+(with depot.users.wpcarro.nixos; [
+  ava
+  marcus
+  tarasco
+])
diff --git a/ops/machines/sanduny/default.nix b/ops/machines/sanduny/default.nix
new file mode 100644
index 000000000000..5f30e08a75f3
--- /dev/null
+++ b/ops/machines/sanduny/default.nix
@@ -0,0 +1,111 @@
+# sanduny.tvl.su
+#
+# This is a VPS hosted with Bitfolk, intended to additionally serve
+# some of our public services like cgit, josh and the websites.
+#
+# In case of whitby going down, sanduny will keep depot available.
+
+_: # ignore readTree options
+
+{ config, depot, lib, pkgs, ... }:
+
+let
+  mod = name: depot.path.origSrc + ("/ops/modules/" + name);
+in
+{
+  imports = [
+    (mod "journaldriver.nix")
+    (mod "known-hosts.nix")
+    (mod "tvl-users.nix")
+    (mod "www/self-redirect.nix")
+  ];
+
+  networking = {
+    hostName = "sanduny";
+    domain = "tvl.su";
+    useDHCP = false;
+
+    interfaces.eth0 = {
+      ipv4.addresses = lib.singleton {
+        address = "85.119.82.231";
+        prefixLength = 21;
+      };
+
+      ipv6.addresses = lib.singleton {
+        address = "2001:ba8:1f1:f109::feed:edef:beef";
+        prefixLength = 64;
+      };
+    };
+
+    defaultGateway = "85.119.80.1";
+    defaultGateway6.address = "2001:ba8:1f1:f109::1";
+
+    firewall.allowedTCPPorts = [ 22 80 443 ];
+
+    # https://bitfolk.com/customer_information.html#toc_2_DNS
+    nameservers = [
+      "85.119.80.232"
+      "85.119.80.233"
+      "2001:ba8:1f1:f205::53"
+      "2001:ba8:1f1:f206::53"
+    ];
+  };
+
+  security.sudo.wheelNeedsPassword = false;
+
+  environment.systemPackages = with pkgs; [
+    emacs-nox
+    vim
+    curl
+    unzip
+    htop
+  ];
+
+  programs.mtr.enable = true;
+
+  services.openssh.enable = true;
+  services.fail2ban.enable = true;
+
+  # Automatically collect garbage from the Nix store.
+  services.depot.automatic-gc = {
+    enable = true;
+    interval = "1 hour";
+    diskThreshold = 2; # GiB
+    maxFreed = 5; # GiB
+    preserveGenerations = "90d";
+  };
+
+  time.timeZone = "UTC";
+
+  # GRUB does not actually need to be installed on disk; Bitfolk have
+  # their own way of booting systems as long as config is in place.
+  boot.loader.grub.device = "nodev";
+  boot.loader.grub.enable = true;
+  boot.loader.grub.version = 2;
+  boot.initrd.availableKernelModules = [ "xen_blkfront" ];
+
+  hardware.cpu.intel.updateMicrocode = true;
+
+  fileSystems = {
+    "/" = {
+      device = "/dev/disk/by-uuid/aabc3638-43ca-45f3-af89-c451e8448e92";
+      fsType = "ext4";
+    };
+
+    "/boot" = {
+      device = "/dev/disk/by-uuid/75aa99d5-fed7-4c5c-8570-7745f6cff9f5";
+      fsType = "ext3";
+    };
+
+    "/nix" = {
+      device = "/dev/disk/by-uuid/d1721678-c294-482b-b72e-3b15f2c56c63";
+      fsType = "ext4";
+    };
+  };
+
+  swapDevices = lib.singleton {
+    device = "/dev/disk/by-uuid/df4ad9da-0a06-4c27-93e5-5d44e4750e55";
+  };
+
+  system.stateVersion = "22.05"; # Did you read the comment?
+}
diff --git a/ops/machines/whitby/OWNERS b/ops/machines/whitby/OWNERS
new file mode 100644
index 000000000000..b1b749e871e1
--- /dev/null
+++ b/ops/machines/whitby/OWNERS
@@ -0,0 +1,6 @@
+inherited: false
+
+# Want in on this list? Try paying!
+owners:
+  - lukegb
+  - tazjin
diff --git a/ops/machines/whitby/README.md b/ops/machines/whitby/README.md
new file mode 100644
index 000000000000..55287c541256
--- /dev/null
+++ b/ops/machines/whitby/README.md
@@ -0,0 +1,5 @@
+whitby
+======
+
+`whitby.tvl.fyi` is our dedicated server providing continuous
+integration services and other random nonsense.
diff --git a/ops/machines/whitby/default.nix b/ops/machines/whitby/default.nix
new file mode 100644
index 000000000000..fc5badd9d8a5
--- /dev/null
+++ b/ops/machines/whitby/default.nix
@@ -0,0 +1,653 @@
+{ depot, lib, pkgs, ... }: # readTree options
+{ config, ... }: # passed by module system
+
+let
+  inherit (builtins) listToAttrs;
+  inherit (lib) range;
+
+  mod = name: depot.path.origSrc + ("/ops/modules/" + name);
+in
+{
+  imports = [
+    (mod "atward.nix")
+    (mod "cgit/default.nix")
+    (mod "clbot.nix")
+    (mod "gerrit-queue.nix")
+    (mod "irccat.nix")
+    (mod "josh.nix")
+    (mod "journaldriver.nix")
+    (mod "known-hosts.nix")
+    (mod "monorepo-gerrit.nix")
+    (mod "nixery.nix")
+    (mod "oauth2_proxy.nix")
+    (mod "owothia.nix")
+    (mod "panettone.nix")
+    (mod "paroxysm.nix")
+    (mod "restic.nix")
+    (mod "smtprelay.nix")
+    (mod "sourcegraph.nix")
+    (mod "tvl-buildkite.nix")
+    (mod "tvl-slapd/default.nix")
+    (mod "tvl-users.nix")
+    (mod "www/atward.tvl.fyi.nix")
+    (mod "www/auth.tvl.fyi.nix")
+    (mod "www/b.tvl.fyi.nix")
+    (mod "www/cache.tvl.su.nix")
+    (mod "www/cl.tvl.fyi.nix")
+    (mod "www/code.tvl.fyi.nix")
+    (mod "www/cs.tvl.fyi.nix")
+    (mod "www/deploys.tvl.fyi.nix")
+    (mod "www/images.tvl.fyi.nix")
+    (mod "www/nixery.dev.nix")
+    (mod "www/self-redirect.nix")
+    (mod "www/static.tvl.fyi.nix")
+    (mod "www/status.tvl.su.nix")
+    (mod "www/tazj.in.nix")
+    (mod "www/todo.tvl.fyi.nix")
+    (mod "www/tvl.fyi.nix")
+    (mod "www/tvl.su.nix")
+    (mod "www/wigglydonke.rs.nix")
+
+    (depot.third_party.agenix.src + "/modules/age.nix")
+  ];
+
+  hardware = {
+    enableRedistributableFirmware = true;
+    cpu.amd.updateMicrocode = true;
+  };
+
+  boot = {
+    tmpOnTmpfs = true;
+    kernelModules = [ "kvm-amd" ];
+    supportedFilesystems = [ "zfs" ];
+
+    initrd = {
+      availableKernelModules = [
+        "igb"
+        "xhci_pci"
+        "nvme"
+        "ahci"
+        "usbhid"
+        "usb_storage"
+        "sr_mod"
+      ];
+
+      # Enable SSH in the initrd so that we can enter disk encryption
+      # passwords remotely.
+      network = {
+        enable = true;
+        ssh = {
+          enable = true;
+          port = 2222;
+          authorizedKeys =
+            depot.users.tazjin.keys.all
+            ++ depot.users.lukegb.keys.all
+            ++ [ depot.users.grfn.keys.whitby ];
+
+          hostKeys = [
+            /etc/secrets/initrd_host_ed25519_key
+          ];
+        };
+
+        # this will launch the zfs password prompt on login and kill the
+        # other prompt
+        postCommands = ''
+          echo "zfs load-key -a && killall zfs" >> /root/.profile
+        '';
+      };
+    };
+
+    kernel.sysctl = {
+      "net.ipv4.tcp_congestion_control" = "bbr";
+    };
+
+    loader.grub = {
+      enable = true;
+      version = 2;
+      efiSupport = true;
+      efiInstallAsRemovable = true;
+      device = "/dev/disk/by-id/nvme-SAMSUNG_MZQLB1T9HAJR-00007_S439NA0N201620";
+    };
+
+    zfs.requestEncryptionCredentials = true;
+  };
+
+  fileSystems = {
+    "/" = {
+      device = "zroot/root";
+      fsType = "zfs";
+    };
+
+    "/boot" = {
+      device = "/dev/disk/by-uuid/073E-7FBD";
+      fsType = "vfat";
+    };
+
+    "/nix" = {
+      device = "zroot/nix";
+      fsType = "zfs";
+    };
+
+    "/home" = {
+      device = "zroot/home";
+      fsType = "zfs";
+    };
+  };
+
+  networking = {
+    # Glass is boring, but Luke doesn't like Wapping - the Prospect of
+    # Whitby, however, is quite a pleasant establishment.
+    hostName = "whitby";
+    domain = "tvl.fyi";
+    hostId = "b38ca543";
+    useDHCP = false;
+
+    # Don't use Hetzner's DNS servers.
+    nameservers = [
+      "8.8.8.8"
+      "8.8.4.4"
+    ];
+
+    defaultGateway6 = {
+      address = "fe80::1";
+      interface = "enp196s0";
+    };
+
+    firewall.allowedTCPPorts = [ 22 80 443 4238 8443 29418 ];
+    firewall.allowedUDPPorts = [ 8443 ];
+
+    interfaces.enp196s0.useDHCP = true;
+    interfaces.enp196s0.ipv6.addresses = [
+      {
+        address = "2a01:04f8:0242:5b21::feed:edef:beef";
+        prefixLength = 64;
+      }
+    ];
+  };
+
+  # Generate an immutable /etc/resolv.conf from the nameserver settings
+  # above (otherwise DHCP overwrites it):
+  environment.etc."resolv.conf" = with lib; {
+    source = pkgs.writeText "resolv.conf" ''
+      ${concatStringsSep "\n" (map (ns: "nameserver ${ns}") config.networking.nameservers)}
+      options edns0
+    '';
+  };
+
+  # Disable background git gc system-wide, as it has a tendency to break CI.
+  environment.etc."gitconfig".source = pkgs.writeText "gitconfig" ''
+    [gc]
+    autoDetach = false
+  '';
+
+  time.timeZone = "UTC";
+
+  nix = {
+    nrBuildUsers = 256;
+    maxJobs = lib.mkDefault 64;
+    extraOptions = ''
+      secret-key-files = /run/agenix/nix-cache-priv
+    '';
+
+    trustedUsers = [
+      "grfn"
+      "lukegb"
+      "tazjin"
+      "sterni"
+    ];
+
+    sshServe = {
+      enable = true;
+      keys = with depot.users;
+        tazjin.keys.all
+        ++ lukegb.keys.all
+        ++ [ grfn.keys.whitby ]
+        ++ sterni.keys.all
+      ;
+    };
+  };
+
+  programs.mtr.enable = true;
+  programs.mosh.enable = true;
+  services.openssh = {
+    enable = true;
+    passwordAuthentication = false;
+    challengeResponseAuthentication = false;
+  };
+
+  # Configure secrets for services that need them.
+  age.secrets =
+    let
+      secretFile = name: depot.ops.secrets."${name}.age";
+    in
+    {
+      clbot.file = secretFile "clbot";
+      gerrit-queue.file = secretFile "gerrit-queue";
+      grafana.file = secretFile "grafana";
+      irccat.file = secretFile "irccat";
+      keycloak-db.file = secretFile "keycloak-db";
+      nix-cache-priv.file = secretFile "nix-cache-priv";
+      oauth2_proxy.file = secretFile "oauth2_proxy";
+      owothia.file = secretFile "owothia";
+      panettone.file = secretFile "panettone";
+      smtprelay.file = secretFile "smtprelay";
+
+      buildkite-agent-token = {
+        file = secretFile "buildkite-agent-token";
+        mode = "0440";
+        group = "buildkite-agents";
+      };
+
+      buildkite-graphql-token = {
+        file = secretFile "buildkite-graphql-token";
+        mode = "0440";
+        group = "buildkite-agents";
+      };
+
+      buildkite-besadii-config = {
+        file = secretFile "besadii";
+        mode = "0440";
+        group = "buildkite-agents";
+      };
+
+      buildkite-private-key = {
+        file = secretFile "buildkite-ssh-private-key";
+        mode = "0440";
+        group = "buildkite-agents";
+      };
+
+      gerrit-besadii-config = {
+        file = secretFile "besadii";
+        owner = "git";
+      };
+
+      gerrit-secrets = {
+        file = secretFile "gerrit-secrets";
+        path = "/var/lib/gerrit/etc/secure.config";
+        owner = "git";
+        mode = "0400";
+      };
+
+      clbot-ssh = {
+        file = secretFile "clbot-ssh";
+        owner = "clbot";
+      };
+
+      # Not actually a secret
+      nix-cache-pub = {
+        file = secretFile "nix-cache-pub";
+        mode = "0444";
+      };
+    };
+
+  # Automatically collect garbage from the Nix store.
+  services.depot.automatic-gc = {
+    enable = true;
+    interval = "1 hour";
+    diskThreshold = 200; # GiB
+    maxFreed = 420; # GiB
+    preserveGenerations = "90d";
+  };
+
+  # Run a handful of Buildkite agents to support parallel builds.
+  services.depot.buildkite = {
+    enable = true;
+    agentCount = 32;
+  };
+
+  # Start a local SMTP relay to Gmail (used by gerrit)
+  services.depot.smtprelay = {
+    enable = true;
+    args = {
+      listen = ":2525";
+      remote_host = "smtp.gmail.com:587";
+      remote_auth = "plain";
+      remote_user = "tvlbot@tazj.in";
+    };
+  };
+
+  # Start a ZNC instance which bounces for tvlbot and owothia.
+  services.znc = {
+    enable = true;
+    useLegacyConfig = false;
+    config = {
+      LoadModule = [
+        "webadmin"
+        "adminlog"
+      ];
+
+      User.admin = {
+        Admin = true;
+        Pass.password = {
+          Method = "sha256";
+          Hash = "bb00aa8239de484c2925b1c3f6a196fb7612633f001daa9b674f83abe7e1103f";
+          Salt = "TiB0Ochb1CrtpMTl;2;j";
+        };
+      };
+
+      Listener.l = {
+        Host = "localhost";
+        Port = 2627; # bncr
+        SSL = false;
+      };
+    };
+  };
+
+  # Start the Gerrit->IRC bot
+  services.depot.clbot = {
+    enable = true;
+    channels = [ "#tvl" ];
+
+    # See //fun/clbot for details.
+    flags = {
+      gerrit_host = "cl.tvl.fyi:29418";
+      gerrit_ssh_auth_username = "clbot";
+      gerrit_ssh_auth_key = config.age.secretsDir + "/clbot-ssh";
+
+      irc_server = "localhost:${toString config.services.znc.config.Listener.l.Port}";
+      irc_user = "tvlbot";
+      irc_nick = "tvlbot";
+
+      notify_branches = "canon,refs/meta/config";
+      notify_repo = "depot";
+
+      # This secret is read from an environment variable, which is
+      # populated by a systemd EnvironmentFile.
+      irc_pass = "$CLBOT_PASS";
+    };
+  };
+
+  services.depot = {
+    # Run a SourceGraph code search instance
+    sourcegraph.enable = true;
+
+    # Run the Panettone issue tracker
+    panettone = {
+      enable = true;
+      dbUser = "panettone";
+      dbName = "panettone";
+      irccatChannel = "#tvl";
+    };
+
+    # Run the first cursed bot (quote bot)
+    paroxysm.enable = true;
+
+    # Run the second cursed bot
+    owothia = {
+      enable = true;
+      ircServer = "localhost";
+      ircPort = config.services.znc.config.Listener.l.Port;
+    };
+
+    # Run irccat to forward messages to IRC
+    irccat = {
+      enable = true;
+      config = {
+        tcp.listen = ":4722"; # "ircc"
+        irc = {
+          server = "localhost:${toString config.services.znc.config.Listener.l.Port}";
+          tls = false;
+          nick = "tvlbot";
+          # Note: irccat means 'ident' where it says 'realname', so
+          # this is critical for connecting to ZNC.
+          realname = "tvlbot";
+          channels = [
+            "#tvl"
+          ];
+        };
+      };
+    };
+
+    # Run atward, the search engine redirection thing.
+    atward.enable = true;
+
+    # Run a Nixery instance
+    nixery.enable = true;
+
+    # Run cgit & josh to serve git
+    cgit.enable = true;
+    josh.enable = true;
+
+    # Configure backups to GleSYS
+    restic = {
+      enable = true;
+      paths = [
+        "/var/backup/postgresql"
+        "/var/lib/grafana"
+        "/var/lib/znc"
+      ];
+    };
+
+    # Run autosubmit bot for Gerrit
+    gerrit-queue.enable = true;
+
+    # Run oauth2_proxy for internal service auth
+    oauth2_proxy.enable = true;
+  };
+
+  services.postgresql = {
+    enable = true;
+    enableTCPIP = true;
+
+    authentication = lib.mkForce ''
+      local all all trust
+      host all all 127.0.0.1/32 password
+      host all all ::1/128 password
+      hostnossl all all 127.0.0.1/32 password
+      hostnossl all all ::1/128  password
+    '';
+
+    ensureDatabases = [
+      "panettone"
+    ];
+
+    ensureUsers = [{
+      name = "panettone";
+      ensurePermissions = {
+        "DATABASE panettone" = "ALL PRIVILEGES";
+      };
+    }];
+  };
+
+  services.postgresqlBackup = {
+    enable = true;
+    databases = [
+      "keycloak"
+      "panettone"
+      "tvldb"
+    ];
+  };
+
+  services.nix-serve = {
+    enable = true;
+    port = 6443;
+    secretKeyFile = config.age.secretsDir + "/nix-cache-priv";
+    bindAddress = "localhost";
+  };
+
+  services.fail2ban.enable = true;
+
+  environment.systemPackages = (with pkgs; [
+    bat
+    bb
+    curl
+    direnv
+    emacs-nox
+    fd
+    git
+    htop
+    hyperfine
+    jq
+    nano
+    nvd
+    ripgrep
+    tree
+    unzip
+    vim
+    zfs
+    zfstools
+  ]) ++ (with depot; [
+    ops.deploy-whitby
+  ]);
+
+  # Required for prometheus to be able to scrape stats
+  services.nginx.statusPage = true;
+
+  # Configure Prometheus & Grafana. Exporter configuration for
+  # Prometheus is inside the respective service modules.
+  services.prometheus = {
+    enable = true;
+    retentionTime = "90d";
+
+    exporters = {
+      node = {
+        enable = true;
+
+        enabledCollectors = [
+          "logind"
+          "processes"
+          "systemd"
+        ];
+      };
+
+      nginx = {
+        enable = true;
+        sslVerify = false;
+        constLabels = [ "host=whitby" ];
+      };
+    };
+
+    scrapeConfigs = [{
+      job_name = "node";
+      scrape_interval = "5s";
+      static_configs = [{
+        targets = [ "localhost:${toString config.services.prometheus.exporters.node.port}" ];
+      }];
+    }
+      {
+        job_name = "nginx";
+        scrape_interval = "5s";
+        static_configs = [{
+          targets = [ "localhost:${toString config.services.prometheus.exporters.nginx.port}" ];
+        }];
+      }];
+  };
+
+  services.grafana = {
+    enable = true;
+    port = 4723; # "graf" on phone keyboard
+    domain = "status.tvl.su";
+    rootUrl = "https://status.tvl.su";
+    analytics.reporting.enable = false;
+    extraOptions =
+      let
+        options = {
+          auth = {
+            generic_oauth = {
+              enabled = true;
+              client_id = "grafana";
+              scopes = "openid profile email";
+              name = "TVL";
+              email_attribute_path = "mail";
+              login_attribute_path = "sub";
+              name_attribute_path = "displayName";
+              auth_url = "https://auth.tvl.fyi/auth/realms/TVL/protocol/openid-connect/auth";
+              token_url = "https://auth.tvl.fyi/auth/realms/TVL/protocol/openid-connect/token";
+              api_url = "https://auth.tvl.fyi/auth/realms/TVL/protocol/openid-connect/userinfo";
+
+              # Give lukegb, grfn, tazjin "Admin" rights.
+              role_attribute_path = "((sub == 'lukegb' || sub == 'grfn' || sub == 'tazjin') && 'Admin') || 'Editor'";
+
+              # Allow creating new Grafana accounts from OAuth accounts.
+              allow_sign_up = true;
+            };
+
+            anonymous = {
+              enabled = true;
+              org_name = "The Virus Lounge";
+              org_role = "Viewer";
+            };
+
+            basic.enabled = false;
+            oauth_auto_login = true;
+            disable_login_form = true;
+          };
+        };
+        inherit (builtins) typeOf replaceStrings listToAttrs concatLists;
+        inherit (lib) toUpper mapAttrsToList nameValuePair concatStringsSep;
+
+        # Take ["auth" "generic_oauth" "enabled"] and turn it into OPTIONS_GENERIC_OAUTH_ENABLED.
+        encodeName = raw: replaceStrings [ "." ] [ "_" ] (toUpper (concatStringsSep "_" raw));
+
+        # Turn an option value into a string, but we want bools to be sensible strings and not "1" or "".
+        optionToString = value:
+          if (typeOf value) == "bool" then
+            if value then "true" else "false"
+          else builtins.toString value;
+
+        # Turn an nested options attrset into a flat listToAttrs-compatible list.
+        encodeOptions = prefix: inp: concatLists (mapAttrsToList
+          (name: value:
+            if (typeOf value) == "set"
+            then encodeOptions (prefix ++ [ name ]) value
+            else [ (nameValuePair (encodeName (prefix ++ [ name ])) (optionToString value)) ]
+          )
+          inp);
+      in
+      listToAttrs (encodeOptions [ ] options);
+
+    provision = {
+      enable = true;
+      datasources = [{
+        name = "Prometheus";
+        type = "prometheus";
+        url = "http://localhost:9090";
+      }];
+    };
+  };
+
+  # Contains GF_AUTH_GENERIC_OAUTH_CLIENT_SECRET.
+  systemd.services.grafana.serviceConfig.EnvironmentFile = config.age.secretsDir + "/grafana";
+
+  services.keycloak = {
+    enable = true;
+    httpPort = "5925"; # "kycl"
+
+    settings = {
+      hostname = "auth.tvl.fyi";
+      http-relative-path = "/auth";
+      proxy = "edge";
+    };
+
+    database = {
+      type = "postgresql";
+      passwordFile = config.age.secretsDir + "/keycloak-db";
+      createLocally = false;
+    };
+  };
+
+  # Allow Keycloak access to the LDAP module by forcing in the JVM
+  # configuration
+  systemd.services.keycloak.environment.PREPEND_JAVA_OPTS =
+    "--add-exports=java.naming/com.sun.jndi.ldap=ALL-UNNAMED";
+
+  security.sudo.extraRules = [
+    {
+      groups = [ "wheel" ];
+      commands = [{ command = "ALL"; options = [ "NOPASSWD" ]; }];
+    }
+  ];
+
+  users = {
+    # Set up a user & group for git shenanigans
+    groups.git = { };
+    users.git = {
+      group = "git";
+      isSystemUser = true;
+      createHome = true;
+      home = "/var/lib/git";
+    };
+  };
+
+  system.stateVersion = "20.03";
+}
diff --git a/ops/modules/.skip-subtree b/ops/modules/.skip-subtree
new file mode 100644
index 000000000000..09520f8c831f
--- /dev/null
+++ b/ops/modules/.skip-subtree
@@ -0,0 +1 @@
+NixOS modules are not readTree compatible.
diff --git a/ops/modules/README.md b/ops/modules/README.md
new file mode 100644
index 000000000000..595b4c3344c6
--- /dev/null
+++ b/ops/modules/README.md
@@ -0,0 +1,7 @@
+NixOS modules
+=============
+
+This folder contains various NixOS modules shared by our NixOS
+configurations.
+
+It is not read by `readTree`.
diff --git a/ops/modules/atward.nix b/ops/modules/atward.nix
new file mode 100644
index 000000000000..f345a08e3131
--- /dev/null
+++ b/ops/modules/atward.nix
@@ -0,0 +1,38 @@
+{ depot, config, lib, pkgs, ... }:
+
+let
+  cfg = config.services.depot.atward;
+  description = "atward - (attempt to) cleverly route queries";
+in
+{
+  options.services.depot.atward = {
+    enable = lib.mkEnableOption description;
+
+    host = lib.mkOption {
+      type = lib.types.str;
+      default = "[::1]";
+      description = "Host on which atward should listen";
+    };
+
+    port = lib.mkOption {
+      type = lib.types.int;
+      default = 28973;
+      description = "Port on which atward should listen";
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    systemd.services.atward = {
+      inherit description;
+      script = "${depot.web.atward}/bin/atward";
+      wantedBy = [ "multi-user.target" ];
+
+      serviceConfig = {
+        DynamicUser = true;
+        Restart = "always";
+      };
+
+      environment.ATWARD_LISTEN_ADDRESS = "${cfg.host}:${toString cfg.port}";
+    };
+  };
+}
diff --git a/ops/modules/auto-deploy.nix b/ops/modules/auto-deploy.nix
new file mode 100644
index 000000000000..c504906b2b94
--- /dev/null
+++ b/ops/modules/auto-deploy.nix
@@ -0,0 +1,104 @@
+# Defines a service for automatically and periodically calling depot's
+# rebuild-system on a NixOS machine.
+#
+# Deploys can be stopped in emergency situations by creating an empty
+# file called `stop` in the state directory of the auto-deploy service
+# (typically /var/lib/auto-deploy).
+{ depot, config, lib, pkgs, ... }:
+
+let
+  cfg = config.services.depot.auto-deploy;
+  description = "to automatically rebuild the current system's NixOS config from the latest checkout of depot";
+
+  rebuild-system = depot.ops.nixos.rebuildSystemWith "$STATE_DIRECTORY/deploy";
+  deployScript = pkgs.writeShellScript "auto-deploy" ''
+    set -ueo pipefail
+
+    if [[ $EUID -ne 0 ]]; then
+      echo "Oh no! Only root is allowed to run auto-deploy!" >&2
+      exit 1
+    fi
+
+    if [[ -f $STATE_DIRECTORY/stop ]]; then
+      echo "stop file exists in $STATE_DIRECTORY, not deploying!" >&2
+      exit 1
+    fi
+
+    readonly depot=$STATE_DIRECTORY/depot.git
+    readonly deploy=$STATE_DIRECTORY/deploy
+    readonly git="git -C $depot"
+
+    # find-or-create depot
+    if [ ! -d $depot ]; then
+      # cannot use $git here because $depot doesn't exist
+      git clone --bare ${cfg.git-remote} $depot
+    fi
+
+    function cleanup() {
+      $git worktree remove $deploy
+    }
+    trap cleanup EXIT
+
+    $git fetch origin
+    $git worktree add --force $deploy FETCH_HEAD
+    # unsure why, but without this switch-to-configuration attempts to install
+    # NixOS in $STATE_DIRECTORY
+    (cd / && ${rebuild-system}/bin/rebuild-system)
+  '';
+in
+{
+  options.services.depot.auto-deploy = {
+    enable = lib.mkEnableOption description;
+
+    git-remote = lib.mkOption {
+      type = lib.types.str;
+      default = "https://cl.tvl.fyi/depot.git";
+      description = ''
+        The (possibly remote) repository from which to clone as specified by the
+        GIT URLS section of `man git-clone`.
+      '';
+    };
+
+    interval = lib.mkOption {
+      type = lib.types.str;
+      example = "1h";
+      description = ''
+        Interval between Nix builds, specified in systemd.time(7) format.
+      '';
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    systemd.services.auto-deploy = {
+      inherit description;
+      script = "${deployScript}";
+      path = with pkgs; [
+        bash
+        git
+        gnutar
+        gzip
+      ];
+      after = [ "network-online.target" ];
+      wants = [ "network-online.target" ];
+
+      # We need to prevent NixOS from interrupting us while it attempts to
+      # restart systemd units.
+      restartIfChanged = false;
+
+      serviceConfig = {
+        Type = "oneshot";
+        StateDirectory = "auto-deploy";
+      };
+    };
+
+    systemd.timers.auto-deploy = {
+      inherit description;
+      wantedBy = [ "multi-user.target" ];
+
+      timerConfig = {
+        OnActiveSec = "1";
+        OnUnitActiveSec = cfg.interval;
+      };
+    };
+  };
+}
diff --git a/ops/modules/automatic-gc.nix b/ops/modules/automatic-gc.nix
new file mode 100644
index 000000000000..ad53a63f7f16
--- /dev/null
+++ b/ops/modules/automatic-gc.nix
@@ -0,0 +1,92 @@
+# Defines a service for automatically collecting Nix garbage
+# periodically, without relying on the (ostensibly broken) Nix options
+# for min/max space available.
+{ config, lib, pkgs, ... }:
+
+let
+  cfg = config.services.depot.automatic-gc;
+  description = "Automatically collect Nix garbage";
+
+  GiBtoKiB = n: n * 1024 * 1024;
+  GiBtoBytes = n: n * 1024 * 1024 * 1024;
+
+  gcScript = pkgs.writeShellScript "automatic-nix-gc" ''
+    set -ueo pipefail
+
+    readonly MIN_THRESHOLD_KIB="${toString (GiBtoKiB cfg.diskThreshold)}"
+    readonly MAX_FREED_BYTES="${toString (GiBtoBytes cfg.maxFreed)}"
+    readonly GEN_THRESHOLD="${cfg.preserveGenerations}"
+    readonly AVAILABLE_KIB=$(df --sync /nix --output=avail | tail -n1)
+
+    if [ "''${AVAILABLE_KIB}" -lt "''${MIN_THRESHOLD_KIB}" ]; then
+      echo "Have ''${AVAILABLE_KIB} KiB, but want ''${MIN_THRESHOLD_KIB} KiB."
+      echo "Triggering Nix garbage collection up to ''${MAX_FREED_BYTES} bytes."
+      set -x
+      ${config.nix.package}/bin/nix-collect-garbage \
+        --delete-older-than "''${GEN_THRESHOLD}" \
+        --max-freed "''${MAX_FREED_BYTES}"
+    else
+      echo "Skipping GC, enough space available"
+    fi
+  '';
+in
+{
+  options.services.depot.automatic-gc = {
+    enable = lib.mkEnableOption description;
+
+    interval = lib.mkOption {
+      type = lib.types.str;
+      example = "1h";
+      description = ''
+        Interval between garbage collection runs, specified in
+        systemd.time(7) format.
+      '';
+    };
+
+    diskThreshold = lib.mkOption {
+      type = lib.types.int;
+      example = "100";
+      description = ''
+        Minimum amount of space that needs to be available (in GiB) on
+        the partition holding /nix. Garbage collection is triggered if
+        it falls below this.
+      '';
+    };
+
+    maxFreed = lib.mkOption {
+      type = lib.types.int;
+      example = "420";
+      description = ''
+        Maximum amount of space to free in a single GC run, in GiB.
+      '';
+    };
+
+    preserveGenerations = lib.mkOption {
+      type = lib.types.str;
+      default = "90d";
+      description = ''
+        Preserve NixOS generations younger than the specified value,
+        in the format expected by nix-collect-garbage(1).
+      '';
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    systemd.services.automatic-gc = {
+      inherit description;
+      script = "${gcScript}";
+      serviceConfig.Type = "oneshot";
+    };
+
+    systemd.timers.automatic-gc = {
+      inherit description;
+      requisite = [ "nix-daemon.service" ];
+      wantedBy = [ "multi-user.target" ];
+
+      timerConfig = {
+        OnActiveSec = "1";
+        OnUnitActiveSec = cfg.interval;
+      };
+    };
+  };
+}
diff --git a/ops/modules/cgit/default.nix b/ops/modules/cgit/default.nix
new file mode 100644
index 000000000000..580b8384bd90
--- /dev/null
+++ b/ops/modules/cgit/default.nix
@@ -0,0 +1,92 @@
+# Configuration for running the TVL cgit instance using thttpd.
+{ config, depot, lib, pkgs, ... }:
+
+let
+  inherit (pkgs) writeText;
+
+  cfg = config.services.depot.cgit;
+
+  cgitConfig = writeText "cgitrc" ''
+    # Global configuration
+    virtual-root=/
+    enable-http-clone=0
+    readme=:README.md
+    about-filter=${depot.tools.cheddar.about-filter}/bin/cheddar-about
+    source-filter=${depot.tools.cheddar}/bin/cheddar
+    enable-log-filecount=1
+    enable-log-linecount=1
+    enable-follow-links=1
+    enable-blame=1
+    mimetype-file=${pkgs.mime-types}/etc/mime.types
+    logo=https://static.tvl.fyi/${depot.web.static.drvHash}/logo-animated.svg
+
+    # Repository configuration
+    repo.url=depot
+    repo.path=/var/lib/gerrit/git/depot.git/
+    repo.desc=monorepo for the virus lounge
+    repo.owner=The Virus Lounge
+    repo.clone-url=https://code.tvl.fyi/depot.git
+  '';
+
+  thttpdConfig = writeText "thttpd.conf" ''
+    port=${toString cfg.port}
+    dir=${depot.third_party.cgit}/cgit
+    nochroot
+    novhost
+    cgipat=**.cgi
+  '';
+
+  # Patched version of thttpd that serves cgit.cgi as the index and
+  # sets the environment variable for pointing cgit at the correct
+  # configuration.
+  #
+  # Things are done this way because recompilation of thttpd is much
+  # faster than cgit.
+  thttpdConfigPatch = writeText "thttpd_cgit_conf.patch" ''
+    diff --git a/libhttpd.c b/libhttpd.c
+    index c6b1622..eef4b73 100644
+    --- a/libhttpd.c
+    +++ b/libhttpd.c
+    @@ -3055,4 +3055,6 @@ make_envp( httpd_conn* hc )
+
+         envn = 0;
+    +    // force cgit to load the correct configuration
+    +    envp[envn++] = "CGIT_CONFIG=${cgitConfig}";
+         envp[envn++] = build_env( "PATH=%s", CGI_PATH );
+     #ifdef CGI_LD_LIBRARY_PATH
+  '';
+
+  thttpdCgit = pkgs.thttpd.overrideAttrs (old: {
+    patches = [
+      ./thttpd_cgi_idx.patch
+      thttpdConfigPatch
+    ];
+  });
+in
+{
+  options.services.depot.cgit = with lib; {
+    enable = mkEnableOption "Run cgit web interface for depot";
+
+    port = mkOption {
+      description = "Port on which cgit should listen";
+      type = types.int;
+      default = 2448;
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    systemd.services.cgit = {
+      wantedBy = [ "multi-user.target" ];
+
+      serviceConfig = {
+        Restart = "on-failure";
+        User = "git";
+        Group = "git";
+
+        ExecStart = pkgs.writeShellScript "cgit-launch" ''
+          exec ${thttpdCgit}/bin/thttpd -D -C ${thttpdConfig}
+        '';
+      };
+    };
+  };
+}
diff --git a/ops/modules/cgit/thttpd_cgi_idx.patch b/ops/modules/cgit/thttpd_cgi_idx.patch
new file mode 100644
index 000000000000..67dbc0c7ab80
--- /dev/null
+++ b/ops/modules/cgit/thttpd_cgi_idx.patch
@@ -0,0 +1,13 @@
+diff --git a/config.h b/config.h
+index 65ab1e3..cde470f 100644
+--- a/config.h
++++ b/config.h
+@@ -327,7 +327,7 @@
+ /* CONFIGURE: A list of index filenames to check.  The files are searched
+ ** for in this order.
+ */
+-#define INDEX_NAMES "index.html", "index.htm", "index.xhtml", "index.xht", "Default.htm", "index.cgi"
++#define INDEX_NAMES "cgit.cgi"
+ 
+ /* CONFIGURE: If this is defined then thttpd will automatically generate
+ ** index pages for directories that don't have an explicit index file.
diff --git a/ops/modules/clbot.nix b/ops/modules/clbot.nix
new file mode 100644
index 000000000000..84575ed07203
--- /dev/null
+++ b/ops/modules/clbot.nix
@@ -0,0 +1,82 @@
+# Module that configures CLBot, our Gerrit->IRC info bridge.
+{ depot, config, lib, pkgs, ... }:
+
+let
+  inherit (builtins) attrValues concatStringsSep mapAttrs readFile;
+  inherit (pkgs) runCommandNoCC;
+
+  inherit (lib)
+    listToAttrs
+    mkEnableOption
+    mkIf
+    mkOption
+    removeSuffix
+    types;
+
+  description = "Bot to forward CL notifications";
+  cfg = config.services.depot.clbot;
+
+  mkFlags = flags:
+    concatStringsSep " "
+      (attrValues (mapAttrs (key: value: "-${key} \"${toString value}\"") flags));
+
+  # Escapes a unit name for use in systemd
+  systemdEscape = name: removeSuffix "\n" (readFile (runCommandNoCC "unit-name" { } ''
+    ${pkgs.systemd}/bin/systemd-escape '${name}' >> $out
+  ''));
+
+  mkUnit = flags: channel: {
+    name = "clbot-${systemdEscape channel}";
+    value = {
+      description = "${description} to ${channel}";
+      wantedBy = [ "multi-user.target" ];
+
+      script = "${depot.fun.clbot}/bin/clbot ${mkFlags (cfg.flags // {
+        irc_channel = channel;
+      })} -alsologtostderr";
+
+      serviceConfig = {
+        User = "clbot";
+        EnvironmentFile = cfg.secretsFile;
+        Restart = "always";
+      };
+    };
+  };
+in
+{
+  options.services.depot.clbot = {
+    enable = mkEnableOption description;
+
+    flags = mkOption {
+      type = types.attrsOf types.str;
+      description = "Key value pairs for command line flags";
+    };
+
+    channels = mkOption {
+      type = with types; listOf str;
+      description = "Channels in which to post (generates one unit per channel)";
+    };
+
+    secretsFile = mkOption {
+      type = types.str;
+      description = "EnvironmentFile from which to load secrets";
+      default = config.age.secretsDir + "/clbot";
+    };
+  };
+
+  config = mkIf cfg.enable {
+    # This does not use DynamicUser because we need to make some files
+    # (notably the SSH private key) readable by this user outside of
+    # the module.
+    users = {
+      groups.clbot = { };
+
+      users.clbot = {
+        group = "clbot";
+        isSystemUser = true;
+      };
+    };
+
+    systemd.services = listToAttrs (map (mkUnit cfg.flags) cfg.channels);
+  };
+}
diff --git a/ops/modules/default-imports.nix b/ops/modules/default-imports.nix
new file mode 100644
index 000000000000..11514a437a42
--- /dev/null
+++ b/ops/modules/default-imports.nix
@@ -0,0 +1,14 @@
+{ depot, ... }:
+
+# Default set of modules that are imported in all Depot nixos systems
+#
+# All modules here should be properly gated behind a `lib.mkEnableOption` with a
+# `lib.mkIf` for the config.
+
+{
+  imports = [
+    ./automatic-gc.nix
+    ./auto-deploy.nix
+    ./tvl-cache.nix
+  ];
+}
diff --git a/ops/modules/default.nix b/ops/modules/default.nix
new file mode 100644
index 000000000000..d747e8e1319a
--- /dev/null
+++ b/ops/modules/default.nix
@@ -0,0 +1,2 @@
+# Make readTree happy at this level.
+_: { }
diff --git a/ops/modules/gerrit-queue.nix b/ops/modules/gerrit-queue.nix
new file mode 100644
index 000000000000..4468bcf1c5f9
--- /dev/null
+++ b/ops/modules/gerrit-queue.nix
@@ -0,0 +1,52 @@
+# Configuration for the Gerrit autosubmit bot (//third_party/gerrit-queue)
+{ depot, pkgs, config, lib, ... }:
+
+let
+  cfg = config.services.depot.gerrit-queue;
+  description = "gerrit-queue - autosubmit bot for Gerrit";
+  mkStringOption = default: lib.mkOption {
+    inherit default;
+    type = lib.types.str;
+  };
+in
+{
+  options.services.depot.gerrit-queue = {
+    enable = lib.mkEnableOption description;
+    gerritUrl = mkStringOption "https://cl.tvl.fyi";
+    gerritProject = mkStringOption "depot";
+    gerritBranch = mkStringOption "canon";
+
+    interval = with lib; mkOption {
+      type = types.int;
+      default = 60;
+      description = "Interval (in seconds) for submit queue checks";
+    };
+
+    secretsFile = with lib; mkOption {
+      description = "Path to a systemd EnvironmentFile containing secrets";
+      default = config.age.secretsDir + "/gerrit-queue";
+      type = types.str;
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    systemd.services.gerrit-queue = {
+      inherit description;
+      wantedBy = [ "multi-user.target" ];
+
+      serviceConfig = {
+        ExecStart = "${depot.third_party.gerrit-queue}/bin/gerrit-queue";
+        DynamicUser = true;
+        Restart = "always";
+        EnvironmentFile = cfg.secretsFile;
+      };
+
+      environment = {
+        GERRIT_URL = cfg.gerritUrl;
+        GERRIT_PROJECT = cfg.gerritProject;
+        GERRIT_BRANCH = cfg.gerritBranch;
+        SUBMIT_QUEUE_TRIGGER_INTERVAL = toString cfg.interval;
+      };
+    };
+  };
+}
diff --git a/ops/modules/irccat.nix b/ops/modules/irccat.nix
new file mode 100644
index 000000000000..0819c52a8de7
--- /dev/null
+++ b/ops/modules/irccat.nix
@@ -0,0 +1,62 @@
+{ depot, config, lib, pkgs, ... }:
+
+let
+  cfg = config.services.depot.irccat;
+  description = "irccat - forward messages to IRC";
+
+  # irccat expects to read its configuration from the *current
+  # directory*, and its configuration contains secrets.
+  #
+  # To make this work we construct the JSON configuration file and
+  # then recursively merge it with an on-disk secret using jq on
+  # service launch.
+  configJson = pkgs.writeText "irccat.json" (builtins.toJSON cfg.config);
+
+  # Right now, merging configuration file with secrets and running the main
+  # application needs to happen both in ExecStart=, due to
+  # https://github.com/systemd/systemd/issues/19604#issuecomment-989279884
+  mergeAndLaunch = pkgs.writeShellScript "merge-irccat-config" ''
+    if [ ! -f "$CREDENTIALS_DIRECTORY/secrets" ]; then
+      echo "irccat secrets file is missing"
+      exit 1
+    fi
+
+    # jq's * is the recursive merge operator
+    ${pkgs.jq}/bin/jq -s '.[0] * .[1]' ${configJson} "$CREDENTIALS_DIRECTORY/secrets" \
+      > /var/lib/irccat/irccat.json
+
+    exec ${depot.third_party.irccat}/bin/irccat
+  '';
+in
+{
+  options.services.depot.irccat = {
+    enable = lib.mkEnableOption description;
+
+    config = lib.mkOption {
+      type = lib.types.attrs; # varying value types
+      description = "Configuration structure (unchecked!)";
+    };
+
+    secretsFile = lib.mkOption {
+      type = lib.types.str;
+      description = "Path to the secrets file to be merged";
+      default = config.age.secretsDir + "/irccat";
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    systemd.services.irccat = {
+      inherit description;
+      wantedBy = [ "multi-user.target" ];
+
+      serviceConfig = {
+        ExecStart = "${mergeAndLaunch}";
+        DynamicUser = true;
+        StateDirectory = "irccat";
+        WorkingDirectory = "/var/lib/irccat";
+        LoadCredential = "secrets:${cfg.secretsFile}";
+        Restart = "always";
+      };
+    };
+  };
+}
diff --git a/ops/modules/josh.nix b/ops/modules/josh.nix
new file mode 100644
index 000000000000..be9e9e966e6b
--- /dev/null
+++ b/ops/modules/josh.nix
@@ -0,0 +1,33 @@
+# Configures the public josh instance for serving the depot.
+{ config, depot, lib, pkgs, ... }:
+
+let
+  cfg = config.services.depot.josh;
+in
+{
+  options.services.depot.josh = with lib; {
+    enable = mkEnableOption "Enable josh for serving the depot";
+
+    port = mkOption {
+      description = "Port on which josh should listen";
+      type = types.int;
+      default = 5674;
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    # Run josh for the depot.
+    systemd.services.josh = {
+      description = "josh - partial cloning of monorepos";
+      wantedBy = [ "multi-user.target" ];
+      path = [ pkgs.git pkgs.bash ];
+
+      serviceConfig = {
+        DynamicUser = true;
+        StateDirectory = "josh";
+        Restart = "always";
+        ExecStart = "${depot.third_party.josh}/bin/josh-proxy --no-background --local /var/lib/josh --port ${toString cfg.port} --remote https://cl.tvl.fyi/";
+      };
+    };
+  };
+}
diff --git a/ops/modules/journaldriver.nix b/ops/modules/journaldriver.nix
new file mode 100644
index 000000000000..0d6b0bcc7f63
--- /dev/null
+++ b/ops/modules/journaldriver.nix
@@ -0,0 +1,26 @@
+# Configures journaldriver to forward to the tvl-fyi GCP project from
+# TVL machines.
+{ config, depot, lib, pkgs, ... }:
+
+{
+  imports = [
+    (depot.third_party.agenix.src + "/modules/age.nix")
+  ];
+
+  age.secrets.journaldriver.file = depot.ops.secrets."journaldriver.age";
+
+  services.journaldriver = {
+    enable = true;
+    googleCloudProject = "tvl-fyi";
+    logStream = config.networking.hostName;
+  };
+
+  # Override the systemd service defined in the nixpkgs module to use
+  # the credentials provided by agenix.
+  systemd.services.journaldriver = {
+    serviceConfig = {
+      LoadCredential = "journaldriver.json:/run/agenix/journaldriver";
+      ExecStart = lib.mkForce "${pkgs.coreutils}/bin/env GOOGLE_APPLICATION_CREDENTIALS=\"\${CREDENTIALS_DIRECTORY}/journaldriver.json\" ${depot.ops.journaldriver}/bin/journaldriver";
+    };
+  };
+}
diff --git a/ops/modules/known-hosts.nix b/ops/modules/known-hosts.nix
new file mode 100644
index 000000000000..9ea689178e3b
--- /dev/null
+++ b/ops/modules/known-hosts.nix
@@ -0,0 +1,21 @@
+# Configure public keys for SSH hosts known to TVL.
+{ ... }:
+
+{
+  programs.ssh.knownHosts = {
+    whitby = {
+      hostNames = [ "whitby.tvl.fyi" "whitby.tvl.su" ];
+      publicKey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAILNh/w4BSKov0jdz3gKBc98tpoLta5bb87fQXWBhAl2I";
+    };
+
+    sanduny = {
+      hostNames = [ "sanduny.tvl.su" ];
+      publicKey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIOag0XhylaTVhmT6HB8EN2Fv5Ymrc4ZfypOXONUkykTX";
+    };
+
+    github = {
+      hostNames = [ "github.com" ];
+      publicKey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIOMqqnkVzrm0SdG6UOoqKLsabgH5C9okWi0dh2l9GKJl";
+    };
+  };
+}
diff --git a/ops/modules/monorepo-gerrit.nix b/ops/modules/monorepo-gerrit.nix
new file mode 100644
index 000000000000..509500c9139d
--- /dev/null
+++ b/ops/modules/monorepo-gerrit.nix
@@ -0,0 +1,152 @@
+# Gerrit configuration for the TVL monorepo
+{ depot, pkgs, config, lib, ... }:
+
+let
+  cfg = config.services.gerrit;
+
+  besadiiWithConfig = name: pkgs.writeShellScript "besadii-whitby" ''
+    export BESADII_CONFIG=/run/agenix/gerrit-besadii-config
+    exec -a ${name} ${depot.ops.besadii}/bin/besadii "$@"
+  '';
+
+  gerritHooks = pkgs.runCommandNoCC "gerrit-hooks" { } ''
+    mkdir -p $out
+    ln -s ${besadiiWithConfig "change-merged"} $out/change-merged
+    ln -s ${besadiiWithConfig "patchset-created"} $out/patchset-created
+  '';
+in
+{
+  services.gerrit = {
+    enable = true;
+    listenAddress = "[::]:4778"; # 4778 - grrt
+    serverId = "4fdfa107-4df9-4596-8e0a-1d2bbdd96e36";
+    builtinPlugins = [
+      "download-commands"
+      "hooks"
+    ];
+
+    plugins = with depot.third_party.gerrit_plugins; [
+      owners
+      oauth
+      depot.ops.gerrit-tvl
+    ];
+
+    package = depot.third_party.gerrit;
+
+    jvmHeapLimit = "4g";
+
+    # In some NixOS channel bump, the default version of OpenJDK has
+    # changed to one that is incompatible with our current version of
+    # Gerrit.
+    #
+    # TODO(tazjin): Update Gerrit and remove this when possible.
+    jvmPackage = pkgs.openjdk11_headless;
+
+    settings = {
+      core.packedGitLimit = "100m";
+      log.jsonLogging = true;
+      log.textLogging = false;
+      sshd.advertisedAddress = "code.tvl.fyi:29418";
+      hooks.path = "${gerritHooks}";
+      cache.web_sessions.maxAge = "3 months";
+      plugins.allowRemoteAdmin = false;
+      change.enableAttentionSet = true;
+      change.enableAssignee = false;
+
+      # Configures gerrit for being reverse-proxied by nginx as per
+      # https://gerrit-review.googlesource.com/Documentation/config-reverseproxy.html
+      gerrit = {
+        canonicalWebUrl = "https://cl.tvl.fyi";
+        docUrl = "/Documentation";
+      };
+
+      httpd.listenUrl = "proxy-https://${cfg.listenAddress}";
+
+      download.command = [
+        "checkout"
+        "cherry_pick"
+        "format_patch"
+        "pull"
+      ];
+
+      # Configure for cgit.
+      gitweb = {
+        type = "custom";
+        url = "https://code.tvl.fyi";
+        project = "/";
+        revision = "/commit/?id=\${commit}";
+        branch = "/log/?h=\${branch}";
+        tag = "/tag/?h=\${tag}";
+        roottree = "/tree/?h=\${commit}";
+        file = "/tree/\${file}?h=\${commit}";
+        filehistory = "/log/\${file}?h=\${branch}";
+        linkname = "cgit";
+      };
+
+      # Auto-link panettone bug links
+      commentlink.panettone = {
+        match = "b/(\\\\d+)";
+        html = "<a href=\"https://b.tvl.fyi/issues/$1\">b/$1</a>";
+      };
+
+      # Auto-link other CLs
+      commentlink.gerrit = {
+        match = "cl/(\\\\d+)";
+        html = "<a href=\"https://cl.tvl.fyi/$1\">cl/$1</a>";
+      };
+
+      # Configures integration with Keycloak, which then integrates with a
+      # variety of backends.
+      auth.type = "OAUTH";
+      plugin.gerrit-oauth-provider-keycloak-oauth = {
+        root-url = "https://auth.tvl.fyi";
+        realm = "TVL";
+        client-id = "gerrit";
+        # client-secret is set in /var/lib/gerrit/etc/secure.config.
+      };
+
+      # Allow users to add additional email addresses to their accounts.
+      oauth.allowRegisterNewEmail = true;
+
+      # Use Gerrit's built-in HTTP passwords, rather than trying to use the
+      # password against the backing OAuth provider.
+      auth.gitBasicAuthPolicy = "HTTP";
+
+      # Email sending (emails are relayed via the tazj.in domain's
+      # GSuite currently).
+      #
+      # Note that sendemail.smtpPass is stored in
+      # $site_path/etc/secure.config and is *not* controlled by Nix.
+      #
+      # Receiving email is not currently supported.
+      sendemail = {
+        enable = true;
+        html = false;
+        connectTimeout = "10sec";
+        from = "TVL Code Review <tvlbot@tazj.in>";
+        includeDiff = true;
+        smtpEncryption = "none";
+        smtpServer = "localhost";
+        smtpServerPort = 2525;
+      };
+    };
+  };
+
+  systemd.services.gerrit = {
+    serviceConfig = {
+      # There seems to be no easy way to get `DynamicUser` to play
+      # well with other services (e.g. by using SupplementaryGroups,
+      # which seem to have no effect) so we force the DynamicUser
+      # setting for the Gerrit service to be disabled and reuse the
+      # existing 'git' user.
+      DynamicUser = lib.mkForce false;
+      User = "git";
+      Group = "git";
+    };
+  };
+
+  services.depot.restic = {
+    paths = [ "/var/lib/gerrit" ];
+    exclude = [ "/var/lib/gerrit/tmp" ];
+  };
+}
diff --git a/ops/modules/nixery.nix b/ops/modules/nixery.nix
new file mode 100644
index 000000000000..4122f9ebbf3b
--- /dev/null
+++ b/ops/modules/nixery.nix
@@ -0,0 +1,43 @@
+# NixOS module to run Nixery, currently with local-storage as the
+# backend for storing/serving image layers.
+{ depot, config, lib, pkgs, ... }:
+
+let
+  cfg = config.services.depot.nixery;
+  description = "Nixery - container images on-demand";
+  storagePath = "/var/lib/nixery/${pkgs.nixpkgsCommits.unstable}";
+in
+{
+  options.services.depot.nixery = {
+    enable = lib.mkEnableOption description;
+
+    port = lib.mkOption {
+      type = lib.types.int;
+      default = 45243; # "image"
+      description = "Port on which Nixery should listen";
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    systemd.services.nixery = {
+      inherit description;
+      wantedBy = [ "multi-user.target" ];
+
+      serviceConfig = {
+        DynamicUser = true;
+        StateDirectory = "nixery";
+        Restart = "always";
+        ExecStartPre = "${pkgs.coreutils}/bin/mkdir -p ${storagePath}";
+        ExecStart = "${depot.tools.nixery.nixery}/bin/server";
+      };
+
+      environment = {
+        PORT = toString cfg.port;
+        NIXERY_PKGS_PATH = pkgs.path;
+        NIXERY_STORAGE_BACKEND = "filesystem";
+        NIX_TIMEOUT = "60"; # seconds
+        STORAGE_PATH = storagePath;
+      };
+    };
+  };
+}
diff --git a/ops/modules/oauth2_proxy.nix b/ops/modules/oauth2_proxy.nix
new file mode 100644
index 000000000000..23afa7bce084
--- /dev/null
+++ b/ops/modules/oauth2_proxy.nix
@@ -0,0 +1,60 @@
+# Configuration for oauth2_proxy, which is used as a handler for nginx
+# auth-request setups.
+#
+# This module exports a helper function at
+# `config.services.depot.oauth2_proxy.withAuth` that can be wrapped
+# around nginx server configuration blocks to configure their
+# authentication setup.
+{ config, depot, pkgs, lib, ... }:
+
+let
+  description = "OAuth2 proxy to authenticate TVL services";
+  cfg = config.services.depot.oauth2_proxy;
+  configFile = pkgs.writeText "oauth2_proxy.cfg" ''
+    email_domains = [ "*" ]
+    http_address = "127.0.0.1:${toString cfg.port}"
+    provider = "keycloak-oidc"
+    client_id = "oauth2-proxy"
+    oidc_issuer_url = "https://auth.tvl.fyi/auth/realms/TVL"
+    reverse_proxy = true
+    set_xauthrequest = true
+  '';
+
+  # Depend on the Keycloak service if it is running on the same
+  # machine.
+  depends_on = lib.optional config.services.keycloak.enable "keycloak.service";
+in
+{
+  options.services.depot.oauth2_proxy = {
+    enable = lib.mkEnableOption description;
+
+    port = lib.mkOption {
+      description = "Port to listen on";
+      type = lib.types.int;
+      default = 2884; # "auth"
+    };
+
+    secretsFile = lib.mkOption {
+      type = lib.types.str;
+      description = "EnvironmentFile from which to load secrets";
+      default = config.age.secretsDir + "/oauth2_proxy";
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    systemd.services.oauth2_proxy = {
+      inherit description;
+      after = depends_on;
+      wants = depends_on;
+      wantedBy = [ "multi-user.target" ];
+
+      serviceConfig = {
+        Restart = "always";
+        RestartSec = "5s";
+        DynamicUser = true;
+        EnvironmentFile = cfg.secretsFile;
+        ExecStart = "${pkgs.oauth2_proxy}/bin/oauth2-proxy --config ${configFile}";
+      };
+    };
+  };
+}
diff --git a/ops/modules/open_eid.nix b/ops/modules/open_eid.nix
new file mode 100644
index 000000000000..4bc35e298c89
--- /dev/null
+++ b/ops/modules/open_eid.nix
@@ -0,0 +1,37 @@
+# NixOS module to configure the Estonian e-ID software.
+{ pkgs, ... }:
+
+let
+  # Wrapper script to tell to Chrome/Chromium to use p11-kit-proxy to load
+  # security devices.
+  # Each user needs to run this themselves, it does not work on a system level
+  # due to a bug in Chromium:
+  #
+  # https://bugs.chromium.org/p/chromium/issues/detail?id=16387
+  #
+  # Firefox users can just set
+  # extraPolicies.SecurityDevices.p11-kit-proxy "${pkgs.p11-kit}/lib/p11-kit-proxy.so";
+  # when overriding the firefox derivation.
+  setup-browser-eid = pkgs.writeShellScriptBin "setup-browser-eid" ''
+    NSSDB="''${HOME}/.pki/nssdb"
+    mkdir -p ''${NSSDB}
+
+    ${pkgs.nssTools}/bin/modutil -force -dbdir sql:$NSSDB -add p11-kit-proxy \
+      -libfile ${pkgs.p11-kit}/lib/p11-kit-proxy.so
+  '';
+in
+{
+  services.pcscd.enable = true;
+
+  # Tell p11-kit to load/proxy opensc-pkcs11.so, providing all available slots
+  # (PIN1 for authentication/decryption, PIN2 for signing).
+  environment.etc."pkcs11/modules/opensc-pkcs11".text = ''
+    module: ${pkgs.opensc}/lib/opensc-pkcs11.so
+  '';
+
+  environment.systemPackages = with pkgs; [
+    libdigidocpp # provides digidoc-tool(1)
+    qdigidoc
+    setup-browser-eid
+  ];
+}
diff --git a/ops/modules/owothia.nix b/ops/modules/owothia.nix
new file mode 100644
index 000000000000..b9746c172090
--- /dev/null
+++ b/ops/modules/owothia.nix
@@ -0,0 +1,68 @@
+# Run the owothia IRC bot.
+{ depot, config, lib, pkgs, ... }:
+
+let
+  cfg = config.services.depot.owothia;
+  description = "owothia - i'm a service owo";
+in
+{
+  options.services.depot.owothia = {
+    enable = lib.mkEnableOption description;
+
+    secretsFile = lib.mkOption {
+      type = lib.types.str;
+      description = "File path from which systemd should read secrets";
+      default = config.age.secretsDir + "/owothia";
+    };
+
+    owoChance = lib.mkOption {
+      type = lib.types.int;
+      description = "How likely is owo?";
+      default = 200;
+    };
+
+    ircServer = lib.mkOption {
+      type = lib.types.str;
+      description = "IRC server hostname";
+    };
+
+    ircPort = lib.mkOption {
+      type = lib.types.int;
+      description = "IRC server port";
+    };
+
+    ircIdent = lib.mkOption {
+      type = lib.types.str;
+      description = "IRC username";
+      default = "owothia";
+    };
+
+    ircChannels = lib.mkOption {
+      type = with lib.types; listOf str;
+      description = "IRC channels to join";
+      default = [ "#tvl" ];
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    systemd.services.owothia = {
+      inherit description;
+      script = "${depot.fun.owothia}/bin/owothia";
+      wantedBy = [ "multi-user.target" ];
+
+      serviceConfig = {
+        DynamicUser = true;
+        Restart = "always";
+        EnvironmentFile = cfg.secretsFile;
+      };
+
+      environment = {
+        OWO_CHANCE = toString cfg.owoChance;
+        IRC_SERVER = cfg.ircServer;
+        IRC_PORT = toString cfg.ircPort;
+        IRC_IDENT = cfg.ircIdent;
+        IRC_CHANNELS = builtins.toJSON cfg.ircChannels;
+      };
+    };
+  };
+}
diff --git a/ops/modules/panettone.nix b/ops/modules/panettone.nix
new file mode 100644
index 000000000000..2576ab16c5bf
--- /dev/null
+++ b/ops/modules/panettone.nix
@@ -0,0 +1,108 @@
+{ depot, config, lib, pkgs, ... }:
+
+let
+  cfg = config.services.depot.panettone;
+in
+{
+  options.services.depot.panettone = with lib; {
+    enable = mkEnableOption "Panettone issue tracker";
+
+    port = mkOption {
+      description = "Port on which Panettone should listen";
+      type = types.int;
+      default = 7268;
+    };
+
+    dbHost = mkOption {
+      description = "Postgresql host to connect to for Panettone";
+      type = types.str;
+      default = "localhost";
+    };
+
+    dbName = mkOption {
+      description = "Name of the database for Panettone";
+      type = types.str;
+      default = "panettone";
+    };
+
+    dbUser = mkOption {
+      description = "Name of the database user for Panettone";
+      type = types.str;
+      default = "panettone";
+    };
+
+    secretsFile = mkOption {
+      description = ''
+        Path to a file containing secrets, in the format accepted
+        by systemd's EnvironmentFile
+      '';
+      type = types.str;
+      default = config.age.secretsDir + "/panettone";
+    };
+
+    irccatHost = mkOption {
+      description = "Hostname for the irccat instance";
+      type = types.str;
+      default = "localhost";
+    };
+
+    irccatPort = mkOption {
+      description = "Port for the irccat instance";
+      type = types.int;
+      default = 4722;
+    };
+
+    irccatChannel = mkOption {
+      description = "IRC channels to post to via irccat";
+      type = types.str;
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    assertions = [{
+      assertion =
+        cfg.dbHost != "localhost" || config.services.postgresql.enable;
+      message = "Panettone requires a postgresql database";
+    }
+      {
+        assertion =
+          cfg.dbHost != "localhost" || config.services.postgresql.enableTCPIP;
+        message = "Panettone can only connect to the postgresql database over TCP";
+      }
+      {
+        assertion =
+          cfg.dbHost != "localhost" || (lib.any
+            (user: user.name == cfg.dbUser)
+            config.services.postgresql.ensureUsers);
+        message = "Panettone requires a database user";
+      }
+      {
+        assertion =
+          cfg.dbHost != "localhost" || (lib.any
+            (db: db == cfg.dbName)
+            config.services.postgresql.ensureDatabases);
+        message = "Panettone requires a database";
+      }];
+
+    systemd.services.panettone = {
+      wantedBy = [ "multi-user.target" ];
+      script = "${depot.web.panettone}/bin/panettone";
+
+      serviceConfig = {
+        DynamicUser = true;
+        Restart = "always";
+        EnvironmentFile = cfg.secretsFile;
+      };
+
+      environment = {
+        PANETTONE_PORT = toString cfg.port;
+        PGHOST = "localhost";
+        PGUSER = cfg.dbUser;
+        PGDATABASE = cfg.dbName;
+        IRCCATHOST = cfg.irccatHost;
+        IRCCATPORT = toString cfg.irccatPort;
+        ISSUECHANNEL = cfg.irccatChannel;
+      };
+    };
+  };
+}
diff --git a/ops/modules/paroxysm.nix b/ops/modules/paroxysm.nix
new file mode 100644
index 000000000000..070e7623db09
--- /dev/null
+++ b/ops/modules/paroxysm.nix
@@ -0,0 +1,28 @@
+{ depot, config, lib, pkgs, ... }:
+
+let
+  cfg = config.services.depot.paroxysm;
+  description = "TVL's majestic IRC bot";
+in
+{
+  options.services.depot.paroxysm.enable = lib.mkEnableOption description;
+
+  config = lib.mkIf cfg.enable {
+    systemd.services.paroxysm = {
+      inherit description;
+      script = "${depot.fun.paroxysm}/bin/paroxysm";
+      wantedBy = [ "multi-user.target" ];
+
+      environment = {
+        PARX_DATABASE_URL = "postgresql://tvldb:tvldb@localhost/tvldb";
+        PARX_IRC_CONFIG_PATH = "/var/lib/paroxysm/irc.toml";
+      };
+
+      serviceConfig = {
+        DynamicUser = true;
+        StateDirectory = "paroxysm";
+        Restart = "always";
+      };
+    };
+  };
+}
diff --git a/ops/modules/prometheus-fail2ban-exporter.nix b/ops/modules/prometheus-fail2ban-exporter.nix
new file mode 100644
index 000000000000..349364f9b7ed
--- /dev/null
+++ b/ops/modules/prometheus-fail2ban-exporter.nix
@@ -0,0 +1,52 @@
+{ config, lib, pkgs, depot, ... }:
+
+let
+  cfg = config.services.prometheus-fail2ban-exporter;
+in
+
+{
+  options.services.prometheus-fail2ban-exporter = with lib; {
+    enable = mkEnableOption "Prometheus Fail2ban Exporter";
+
+    interval = mkOption {
+      description = "Systemd calendar expression for how often to run the interval";
+      type = types.string;
+      default = "minutely";
+      example = "hourly";
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    systemd.services."prometheus-fail2ban-exporter" = {
+      wantedBy = [ "multi-user.target" ];
+      after = [ "network.target" "fail2ban.service" ];
+      serviceConfig = {
+        User = "root";
+        Type = "oneshot";
+        ExecStart = pkgs.writeShellScript "prometheus-fail2ban-exporter" ''
+          set -eo pipefail
+          mkdir -p /var/lib/prometheus/node-exporter
+          exec prometheus-fail2ban-exporter
+        '';
+      };
+
+      path = [
+        pkgs.fail2ban
+        depot.third_party.prometheus-fail2ban-exporter
+      ];
+    };
+
+    systemd.timers."prometheus-fail2ban-exporter" = {
+      wantedBy = [ "multi-user.target" ];
+      timerConfig.OnCalendar = cfg.interval;
+    };
+
+    services.prometheus.exporters.node = {
+      enabledCollectors = [ "textfile" ];
+
+      extraFlags = [
+        "--collector.textfile.directory=/var/lib/prometheus/node-exporter"
+      ];
+    };
+  };
+}
diff --git a/ops/modules/quassel.nix b/ops/modules/quassel.nix
new file mode 100644
index 000000000000..275e2809d793
--- /dev/null
+++ b/ops/modules/quassel.nix
@@ -0,0 +1,79 @@
+# A more modern module for running Quassel.
+{ config, lib, pkgs, ... }:
+
+let
+  cfg = config.services.depot.quassel;
+  quasselDaemon = pkgs.quassel.override {
+    monolithic = false;
+    enableDaemon = true;
+    withKDE = false;
+  };
+in
+{
+  options.services.depot.quassel = with lib; {
+    enable = mkEnableOption "Quassel IRC daemon";
+
+    acmeHost = mkOption {
+      description = "ACME host to use for the Quassel TLS certificate";
+      type = lib.types.str;
+    };
+
+    bindAddresses = mkOption {
+      description = "Addresses Quassel will bind to/listen on";
+      default = [ "127.0.0.1" ];
+    };
+
+    logLevel = mkOption {
+      description = "Log level for Quassel Core";
+      default = "Info";
+      type = lib.types.enum [
+        "Debug"
+        "Info"
+        "Warning"
+        "Error"
+      ];
+    };
+
+    port = mkOption {
+      default = 6698;
+      description = ''
+        The port number the Quassel daemon will be listening to.
+      '';
+    };
+  };
+
+  config = with lib; mkIf cfg.enable {
+    networking.firewall.allowedTCPPorts = [ cfg.port ];
+
+    systemd.services.quassel = {
+      description = "Quassel IRC daemon";
+      wantedBy = [ "multi-user.target" ];
+
+      script = concatStringsSep " " [
+        "${quasselDaemon}/bin/quasselcore"
+        "--listen=${concatStringsSep "," cfg.bindAddresses}"
+        "--port=${toString cfg.port}"
+        "--configdir=/var/lib/quassel"
+        "--require-ssl"
+        "--ssl-cert=/var/lib/acme/${cfg.acmeHost}/full.pem"
+        "--loglevel=${cfg.logLevel}"
+      ];
+
+      serviceConfig = {
+        Restart = "always";
+        User = "quassel";
+        Group = "quassel";
+        StateDirectory = "quassel";
+      };
+    };
+
+    users = {
+      users.quassel = {
+        isSystemUser = true;
+        group = "quassel";
+      };
+
+      groups.quassel = { };
+    };
+  };
+}
diff --git a/ops/modules/restic.nix b/ops/modules/restic.nix
new file mode 100644
index 000000000000..869539603578
--- /dev/null
+++ b/ops/modules/restic.nix
@@ -0,0 +1,62 @@
+# Configure restic backups to S3-compatible storage, in our case
+# GleSYS object storage.
+#
+# Conventions:
+# - restic's cache lives in /var/backup/restic/cache
+# - repository password lives in /var/backup/restic/secret
+# - object storage credentials in /var/backup/restic/glesys-key
+{ config, lib, pkgs, ... }:
+
+let
+  cfg = config.services.depot.restic;
+  description = "Restic backups to GleSYS";
+  mkStringOption = default: lib.mkOption {
+    inherit default;
+    type = lib.types.str;
+  };
+in
+{
+  options.services.depot.restic = {
+    enable = lib.mkEnableOption description;
+    bucketEndpoint = mkStringOption "objects.dc-sto1.glesys.net";
+    bucketName = mkStringOption "aged-resonance";
+    bucketCredentials = mkStringOption "/var/backup/restic/glesys-key";
+    repository = mkStringOption config.networking.hostName;
+    interval = mkStringOption "hourly";
+
+    paths = with lib; mkOption {
+      description = "Directories that should be backed up";
+      type = types.listOf types.str;
+    };
+
+    exclude = with lib; mkOption {
+      description = "Files that should be excluded from backups";
+      type = types.listOf types.str;
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    systemd.services.restic = {
+      description = "Backups to GleSYS";
+
+      script = "${pkgs.restic}/bin/restic backup ${lib.concatStringsSep " " cfg.paths}";
+
+      environment = {
+        RESTIC_REPOSITORY = "s3:${cfg.bucketEndpoint}/${cfg.bucketName}/${cfg.repository}";
+        AWS_SHARED_CREDENTIALS_FILE = cfg.bucketCredentials;
+        RESTIC_PASSWORD_FILE = "/var/backup/restic/secret";
+        RESTIC_CACHE_DIR = "/var/backup/restic/cache";
+
+        RESTIC_EXCLUDE_FILE =
+          builtins.toFile "exclude-files" (lib.concatStringsSep "\n" cfg.exclude);
+      };
+    };
+
+    systemd.timers.restic = {
+      wantedBy = [ "multi-user.target" ];
+      timerConfig.OnCalendar = cfg.interval;
+    };
+
+    environment.systemPackages = [ pkgs.restic ];
+  };
+}
diff --git a/ops/modules/smtprelay.nix b/ops/modules/smtprelay.nix
new file mode 100644
index 000000000000..f6ce2621757d
--- /dev/null
+++ b/ops/modules/smtprelay.nix
@@ -0,0 +1,61 @@
+# NixOS module for configuring the simple SMTP relay.
+{ depot, pkgs, config, lib, ... }:
+
+let
+  inherit (builtins) attrValues mapAttrs;
+  inherit (lib)
+    concatStringsSep
+    mkEnableOption
+    mkIf
+    mkOption
+    types
+    ;
+
+  cfg = config.services.depot.smtprelay;
+  description = "Simple SMTP relay";
+
+  # Configuration values that are always overridden.
+  #
+  # - logging is pinned to stdout for journald compatibility
+  # - secret config is loaded through systemd's credential loading facility
+  overrideArgs = {
+    logfile = "";
+    config = "$CREDENTIALS_DIRECTORY/secrets";
+  };
+
+  # Creates the command line argument string for the service.
+  prepareArgs = args:
+    concatStringsSep " "
+      (attrValues (mapAttrs (key: value: "-${key} \"${toString value}\"")
+        (args // overrideArgs)));
+in
+{
+  options.services.depot.smtprelay = {
+    enable = mkEnableOption description;
+
+    args = mkOption {
+      type = types.attrsOf types.str;
+      description = "Key value pairs for command line arguments";
+    };
+
+    secretsFile = mkOption {
+      type = types.str;
+      default = config.age.secretsDir + "/smtprelay";
+    };
+  };
+
+  config = mkIf cfg.enable {
+    systemd.services.smtprelay = {
+      inherit description;
+      script = "${depot.third_party.smtprelay}/bin/smtprelay ${prepareArgs cfg.args}";
+      wantedBy = [ "multi-user.target" ];
+
+      serviceConfig = {
+        Restart = "always";
+        StateDirectory = "smtprelay";
+        DynamicUser = true;
+        LoadCredential = "secrets:${cfg.secretsFile}";
+      };
+    };
+  };
+}
diff --git a/ops/modules/sourcegraph.nix b/ops/modules/sourcegraph.nix
new file mode 100644
index 000000000000..cbf836ab64d5
--- /dev/null
+++ b/ops/modules/sourcegraph.nix
@@ -0,0 +1,60 @@
+# Run sourcegraph, including its entire machinery, in a container.
+# Running it outside of a container is a futile endeavour for now.
+{ depot, config, pkgs, lib, ... }:
+
+let
+  cfg = config.services.depot.sourcegraph;
+in
+{
+  options.services.depot.sourcegraph = with lib; {
+    enable = mkEnableOption "SourceGraph code search engine";
+
+    port = mkOption {
+      description = "Port on which SourceGraph should listen";
+      type = types.int;
+      default = 3463;
+    };
+
+    cheddarPort = mkOption {
+      description = "Port on which cheddar should listen";
+      type = types.int;
+      default = 4238;
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    # Run a cheddar syntax highlighting server
+    systemd.services.cheddar-server = {
+      wantedBy = [ "multi-user.target" ];
+      script = "${depot.tools.cheddar}/bin/cheddar --listen 0.0.0.0:${toString cfg.cheddarPort} --sourcegraph-server";
+
+      serviceConfig = {
+        DynamicUser = true;
+        Restart = "always";
+      };
+    };
+
+    virtualisation.oci-containers.containers.sourcegraph = {
+      image = "sourcegraph/server:3.40.0";
+
+      ports = [
+        "127.0.0.1:${toString cfg.port}:7080"
+      ];
+
+      volumes = [
+        "/var/lib/sourcegraph/etc:/etc/sourcegraph"
+        "/var/lib/sourcegraph/data:/var/opt/sourcegraph"
+      ];
+
+      # TODO(tazjin): Figure out what changed in the protocol.
+      # environment.SRC_SYNTECT_SERVER = "http://172.17.0.1:${toString cfg.cheddarPort}";
+
+      # Sourcegraph needs a higher nofile limit, it logs warnings
+      # otherwise (unclear whether it actually affects the service).
+      extraOptions = [
+        "--ulimit"
+        "nofile=10000:10000"
+      ];
+    };
+  };
+}
diff --git a/ops/modules/tvl-buildkite.nix b/ops/modules/tvl-buildkite.nix
new file mode 100644
index 000000000000..4341ef01d744
--- /dev/null
+++ b/ops/modules/tvl-buildkite.nix
@@ -0,0 +1,77 @@
+# Configuration for the TVL buildkite agents.
+{ config, depot, pkgs, lib, ... }:
+
+let
+  cfg = config.services.depot.buildkite;
+  agents = lib.range 1 cfg.agentCount;
+  description = "Buildkite agents for TVL";
+
+  besadiiWithConfig = name: pkgs.writeShellScript "besadii-whitby" ''
+    export BESADII_CONFIG=/run/agenix/buildkite-besadii-config
+    exec -a ${name} ${depot.ops.besadii}/bin/besadii "$@"
+  '';
+
+  # All Buildkite hooks are actually besadii, but it's being invoked
+  # with different names.
+  buildkiteHooks = pkgs.runCommandNoCC "buildkite-hooks" { } ''
+    mkdir -p $out/bin
+    ln -s ${besadiiWithConfig "post-command"} $out/bin/post-command
+  '';
+
+  credentialHelper = pkgs.writeShellScriptBin "git-credential-gerrit-creds" ''
+    echo 'username=buildkite'
+    echo "password=$(jq -r '.gerritPassword' /run/agenix/buildkite-besadii-config)"
+  '';
+in
+{
+  options.services.depot.buildkite = {
+    enable = lib.mkEnableOption description;
+    agentCount = lib.mkOption {
+      type = lib.types.int;
+      description = "Number of Buildkite agents to launch";
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    # Run the Buildkite agents using the default upstream module.
+    services.buildkite-agents = builtins.listToAttrs (map
+      (n: rec {
+        name = "whitby-${toString n}";
+        value = {
+          inherit name;
+          enable = true;
+          tokenPath = config.age.secretsDir + "/buildkite-agent-token";
+          privateSshKeyPath = config.age.secretsDir + "/buildkite-private-key";
+          hooks.post-command = "${buildkiteHooks}/bin/post-command";
+
+          runtimePackages = with pkgs; [
+            bash
+            coreutils
+            credentialHelper
+            curl
+            git
+            gnutar
+            gzip
+            jq
+            nix
+          ];
+        };
+      })
+      agents);
+
+    # Set up a group for all Buildkite agent users
+    users = {
+      groups.buildkite-agents = { };
+      users = builtins.listToAttrs (map
+        (n: rec {
+          name = "buildkite-agent-whitby-${toString n}";
+          value = {
+            isSystemUser = true;
+            group = lib.mkForce "buildkite-agents";
+            extraGroups = [ name "docker" ];
+          };
+        })
+        agents);
+    };
+  };
+}
diff --git a/ops/modules/tvl-cache.nix b/ops/modules/tvl-cache.nix
new file mode 100644
index 000000000000..4d574821df44
--- /dev/null
+++ b/ops/modules/tvl-cache.nix
@@ -0,0 +1,19 @@
+{ config, lib, pkgs, ... }:
+
+{
+  options = {
+    tvl.cache.enable = lib.mkEnableOption "the TVL binary cache";
+  };
+
+  config = lib.mkIf config.tvl.cache.enable {
+    nix = {
+      binaryCachePublicKeys = [
+        "cache.tvl.su:kjc6KOMupXc1vHVufJUoDUYeLzbwSr9abcAKdn/U1Jk="
+      ];
+
+      binaryCaches = [
+        "https://cache.tvl.su"
+      ];
+    };
+  };
+}
diff --git a/ops/modules/tvl-slapd/default.nix b/ops/modules/tvl-slapd/default.nix
new file mode 100644
index 000000000000..3979491f8cab
--- /dev/null
+++ b/ops/modules/tvl-slapd/default.nix
@@ -0,0 +1,81 @@
+# Configures an OpenLDAP instance for TVL
+#
+# TODO(tazjin): Configure ldaps://
+{ depot, lib, pkgs, ... }:
+
+with depot.nix.yants;
+
+let
+  user = struct {
+    username = string;
+    email = string;
+    password = string;
+    displayName = option string;
+  };
+
+  toLdif = defun [ user string ] (u: ''
+    dn: cn=${u.username},ou=users,dc=tvl,dc=fyi
+    objectClass: organizationalPerson
+    objectClass: inetOrgPerson
+    sn: ${u.username}
+    cn: ${u.username}
+    displayName: ${u.displayName or u.username}
+    mail: ${u.email}
+    userPassword: ${u.password}
+  '');
+
+  inherit (depot.ops) users;
+
+in
+{
+  services.openldap = {
+    enable = true;
+
+    settings.children = {
+      "olcDatabase={1}mdb".attrs = {
+        objectClass = [ "olcDatabaseConfig" "olcMdbConfig" ];
+        olcDatabase = "{1}mdb";
+        olcDbDirectory = "/var/lib/openldap";
+        olcSuffix = "dc=tvl,dc=fyi";
+        olcAccess = "to *  by * read";
+        olcRootDN = "cn=admin,dc=tvl,dc=fyi";
+        olcRootPW = "{ARGON2}$argon2id$v=19$m=65536,t=2,p=1$OfcgkOQ96VQ3aJj7NfA9vQ$oS6HQOkYl/bUYg4SejpltQYy7kvqx/RUxvoR4zo1vXU";
+      };
+
+      "cn=module{0}".attrs = {
+        objectClass = "olcModuleList";
+        olcModuleLoad = "argon2";
+      };
+
+      "cn=schema".includes =
+        map (schema: "${pkgs.openldap}/etc/schema/${schema}.ldif")
+          [ "core" "cosine" "inetorgperson" "nis" ];
+    };
+
+    # Contents are immutable at runtime, and adding user accounts etc.
+    # is done statically in the LDIF-formatted contents in this folder.
+    declarativeContents."dc=tvl,dc=fyi" = ''
+      dn: dc=tvl,dc=fyi
+      dc: tvl
+      o: TVL LDAP server
+      description: Root entry for tvl.fyi
+      objectClass: top
+      objectClass: dcObject
+      objectClass: organization
+
+      dn: ou=users,dc=tvl,dc=fyi
+      ou: users
+      description: All users in TVL
+      objectClass: top
+      objectClass: organizationalUnit
+
+      dn: ou=groups,dc=tvl,dc=fyi
+      ou: groups
+      description: All groups in TVL
+      objectClass: top
+      objectClass: organizationalUnit
+
+      ${lib.concatStringsSep "\n" (map toLdif users)}
+    '';
+  };
+}
diff --git a/ops/modules/tvl-users.nix b/ops/modules/tvl-users.nix
new file mode 100644
index 000000000000..988b9eed8af6
--- /dev/null
+++ b/ops/modules/tvl-users.nix
@@ -0,0 +1,94 @@
+# Standard NixOS users for TVL machines, as well as configuration that
+# should following along when they are added to a machine.
+{ depot, pkgs, ... }:
+
+{
+  users = {
+    users.tazjin = {
+      isNormalUser = true;
+      extraGroups = [ "git" "wheel" ];
+      shell = pkgs.fish;
+      openssh.authorizedKeys.keys = depot.users.tazjin.keys.all;
+    };
+
+    users.lukegb = {
+      isNormalUser = true;
+      extraGroups = [ "git" "wheel" ];
+      openssh.authorizedKeys.keys = depot.users.lukegb.keys.all;
+    };
+
+    users.grfn = {
+      isNormalUser = true;
+      extraGroups = [ "git" "wheel" ];
+      openssh.authorizedKeys.keys = [
+        depot.users.grfn.keys.whitby
+      ];
+    };
+
+    users.edef = {
+      isNormalUser = true;
+      extraGroups = [ "git" ];
+      openssh.authorizedKeys.keys = depot.users.edef.keys.all;
+    };
+
+    users.qyliss = {
+      isNormalUser = true;
+      extraGroups = [ "git" ];
+      openssh.authorizedKeys.keys = depot.users.qyliss.keys.all;
+    };
+
+    users.eta = {
+      isNormalUser = true;
+      extraGroups = [ "git" ];
+      openssh.authorizedKeys.keys = depot.users.eta.keys.whitby;
+    };
+
+    users.cynthia = {
+      isNormalUser = true; # I'm normal OwO :3
+      extraGroups = [ "git" ];
+      openssh.authorizedKeys.keys = depot.users.cynthia.keys.all;
+    };
+
+    users.firefly = {
+      isNormalUser = true;
+      extraGroups = [ "git" ];
+      openssh.authorizedKeys.keys = depot.users.firefly.keys.whitby;
+    };
+
+    users.sterni = {
+      isNormalUser = true;
+      extraGroups = [ "git" "wheel" ];
+      openssh.authorizedKeys.keys = depot.users.sterni.keys.all;
+    };
+
+    users.flokli = {
+      isNormalUser = true;
+      extraGroups = [ "git" ];
+      openssh.authorizedKeys.keys = depot.users.flokli.keys.all;
+    };
+
+    # Temporarily disabled (inactive) users.
+    users.isomer = {
+      isNormalUser = true;
+      extraGroups = [ "git" ];
+      shell = "${pkgs.shadow}/bin/nologin";
+      openssh.authorizedKeys.keys = depot.users.isomer.keys.all;
+    };
+
+    users.riking = {
+      isNormalUser = true;
+      extraGroups = [ "git" ];
+      shell = "${pkgs.shadow}/bin/nologin";
+      openssh.authorizedKeys.keys = depot.users.riking.keys.u2f ++ depot.users.riking.keys.passworded;
+    };
+  };
+
+  environment.systemPackages = with pkgs; [
+    alacritty.terminfo
+    foot.terminfo
+    rxvt_unicode.terminfo
+
+    # TODO(sterni): re-enable when the kitty build is fixed upstreams
+    # kitty.terminfo
+  ];
+}
diff --git a/ops/modules/v4l2loopback.nix b/ops/modules/v4l2loopback.nix
new file mode 100644
index 000000000000..636b2ff6cf27
--- /dev/null
+++ b/ops/modules/v4l2loopback.nix
@@ -0,0 +1,12 @@
+{ config, lib, pkgs, ... }:
+
+{
+  boot = {
+    extraModulePackages = [ config.boot.kernelPackages.v4l2loopback ];
+    kernelModules = [ "v4l2loopback" ];
+    extraModprobeConfig = ''
+      options v4l2loopback exclusive_caps=1
+    '';
+  };
+}
+
diff --git a/ops/modules/www/atward.tvl.fyi.nix b/ops/modules/www/atward.tvl.fyi.nix
new file mode 100644
index 000000000000..6b3672dd75cb
--- /dev/null
+++ b/ops/modules/www/atward.tvl.fyi.nix
@@ -0,0 +1,33 @@
+# Serve atward, the query redirection ... thing.
+{ config, ... }:
+
+{
+  imports = [
+    ./base.nix
+  ];
+
+  config = {
+    # Short link support (i.e. plain http://at) for users with a
+    # configured tvl.fyi/tvl.su search domain.
+    services.nginx.virtualHosts."at-shortlink" = {
+      serverName = "at";
+      extraConfig = "return 302 https://atward.tvl.fyi$request_uri;";
+    };
+
+    services.nginx.virtualHosts."atward" = {
+      serverName = "atward.tvl.fyi";
+      enableACME = true;
+      forceSSL = true;
+
+      serverAliases = [
+        "atward.tvl.su"
+        "at.tvl.fyi"
+        "at.tvl.su"
+      ];
+
+      locations."/" = {
+        proxyPass = "http://localhost:${toString config.services.depot.atward.port}";
+      };
+    };
+  };
+}
diff --git a/ops/modules/www/auth.tvl.fyi.nix b/ops/modules/www/auth.tvl.fyi.nix
new file mode 100644
index 000000000000..e0c031bf700c
--- /dev/null
+++ b/ops/modules/www/auth.tvl.fyi.nix
@@ -0,0 +1,24 @@
+{ config, ... }:
+
+{
+  imports = [
+    ./base.nix
+  ];
+
+  config = {
+    services.nginx.virtualHosts."auth.tvl.fyi" = {
+      serverName = "auth.tvl.fyi";
+      enableACME = true;
+      forceSSL = true;
+
+      extraConfig = ''
+        location / {
+          proxy_pass http://localhost:${config.services.keycloak.httpPort};
+          proxy_set_header X-Forwarded-For $remote_addr;
+          proxy_set_header X-Forwarded-Proto https;
+          proxy_set_header Host $host;
+        }
+      '';
+    };
+  };
+}
diff --git a/ops/modules/www/b.tvl.fyi.nix b/ops/modules/www/b.tvl.fyi.nix
new file mode 100644
index 000000000000..45f6c6ed5141
--- /dev/null
+++ b/ops/modules/www/b.tvl.fyi.nix
@@ -0,0 +1,32 @@
+{ config, ... }:
+
+{
+  imports = [
+    ./base.nix
+  ];
+
+  config = {
+    services.nginx.virtualHosts."b-shortlink" = {
+      serverName = "b";
+      extraConfig = "return 302 https://b.tvl.fyi$request_uri;";
+    };
+
+    services.nginx.virtualHosts."b.tvl.fyi" = {
+      serverName = "b.tvl.fyi";
+      serverAliases = [ "b.tvl.su" ];
+      enableACME = true;
+      forceSSL = true;
+
+      extraConfig = ''
+        # Forward short links to issues to the issue itself (b/32)
+        location ~ ^/(\d+)$ {
+          return 302 https://b.tvl.fyi/issues$request_uri;
+        }
+
+        location / {
+          proxy_pass http://localhost:${toString config.services.depot.panettone.port};
+        }
+      '';
+    };
+  };
+}
diff --git a/ops/modules/www/base.nix b/ops/modules/www/base.nix
new file mode 100644
index 000000000000..50fceff0fa40
--- /dev/null
+++ b/ops/modules/www/base.nix
@@ -0,0 +1,41 @@
+{ config, pkgs, ... }:
+
+{
+  config = {
+    security.acme = {
+      acceptTerms = true;
+      defaults.email = "letsencrypt@tvl.su";
+    };
+
+    services.nginx = {
+      enable = true;
+      enableReload = true;
+
+      recommendedTlsSettings = true;
+      recommendedGzipSettings = true;
+      recommendedProxySettings = true;
+
+      commonHttpConfig = ''
+        log_format json_combined escape=json
+        '{'
+            '"remote_addr":"$remote_addr",'
+            '"method":"$request_method",'
+            '"host":"$host",'
+            '"uri":"$request_uri",'
+            '"status":$status,'
+            '"request_size":$request_length,'
+            '"response_size":$body_bytes_sent,'
+            '"response_time":$request_time,'
+            '"referrer":"$http_referer",'
+            '"user_agent":"$http_user_agent"'
+        '}';
+
+        access_log syslog:server=unix:/dev/log,nohostname json_combined;
+      '';
+
+      appendHttpConfig = ''
+        add_header Permissions-Policy "interest-cohort=()";
+      '';
+    };
+  };
+}
diff --git a/ops/modules/www/cache.tvl.su.nix b/ops/modules/www/cache.tvl.su.nix
new file mode 100644
index 000000000000..99bc008cd6a5
--- /dev/null
+++ b/ops/modules/www/cache.tvl.su.nix
@@ -0,0 +1,31 @@
+{ config, ... }:
+
+{
+  imports = [
+    ./base.nix
+  ];
+
+  config = {
+    services.nginx.virtualHosts."cache.tvl.su" = {
+      serverName = "cache.tvl.su";
+      serverAliases = [ "cache.tvl.fyi" ];
+      enableACME = true;
+      forceSSL = true;
+
+      extraConfig = ''
+        location = /cache-key.pub {
+          alias /run/agenix/nix-cache-pub;
+        }
+
+        location = /nix-cache-info {
+          add_header Content-Type text/plain;
+          return 200 "StoreDir: /nix/store\nWantMassQuery: 1\nPriority: 50\n";
+        }
+
+        location / {
+          proxy_pass http://localhost:${toString config.services.nix-serve.port};
+        }
+      '';
+    };
+  };
+}
diff --git a/ops/modules/www/cl.tvl.fyi.nix b/ops/modules/www/cl.tvl.fyi.nix
new file mode 100644
index 000000000000..470122c395ea
--- /dev/null
+++ b/ops/modules/www/cl.tvl.fyi.nix
@@ -0,0 +1,30 @@
+{ config, ... }:
+
+{
+  imports = [
+    ./base.nix
+  ];
+
+  config = {
+    services.nginx.virtualHosts."cl-shortlink" = {
+      serverName = "cl";
+      extraConfig = "return 302 https://cl.tvl.fyi$request_uri;";
+    };
+
+    services.nginx.virtualHosts.gerrit = {
+      serverName = "cl.tvl.fyi";
+      serverAliases = [ "cl.tvl.su" ];
+      enableACME = true;
+      forceSSL = true;
+
+      extraConfig = ''
+        location / {
+          proxy_pass http://localhost:4778;
+          proxy_set_header  X-Forwarded-For $remote_addr;
+          # The :443 suffix is a workaround for https://b.tvl.fyi/issues/88.
+          proxy_set_header  Host $host:443;
+        }
+      '';
+    };
+  };
+}
diff --git a/ops/modules/www/code.tvl.fyi.nix b/ops/modules/www/code.tvl.fyi.nix
new file mode 100644
index 000000000000..3f34a9422cb1
--- /dev/null
+++ b/ops/modules/www/code.tvl.fyi.nix
@@ -0,0 +1,45 @@
+{ depot, config, ... }:
+
+{
+  imports = [
+    ./base.nix
+  ];
+
+  config = {
+    services.nginx.virtualHosts.cgit = {
+      serverName = "code.tvl.fyi";
+      serverAliases = [ "code.tvl.su" ];
+      enableACME = true;
+      forceSSL = true;
+
+      extraConfig = ''
+        # Serve the rendered Tvix component SVG.
+        #
+        # TODO(tazjin): Implement a way of serving this dynamically
+        location = /about/tvix/docs/component-flow.svg {
+            alias ${depot.tvix.docs.svg}/component-flow.svg;
+        }
+
+        # Git operations on depot.git hit josh
+        location /depot.git {
+            proxy_pass http://localhost:${toString config.services.depot.josh.port};
+        }
+
+        # Git clone operations on '/' should be redirected to josh now.
+        location = /info/refs {
+            return 302 https://code.tvl.fyi/depot.git/info/refs$is_args$args;
+        }
+
+        # Static assets must always hit the root.
+        location ~ ^/(favicon\.ico|cgit\.(css|png))$ {
+           proxy_pass http://localhost:2448;
+        }
+
+        # Everything else is forwarded to cgit for the web view
+        location / {
+            proxy_pass http://localhost:2448/cgit.cgi/depot/;
+        }
+      '';
+    };
+  };
+}
diff --git a/ops/modules/www/cs.tvl.fyi.nix b/ops/modules/www/cs.tvl.fyi.nix
new file mode 100644
index 000000000000..fac814baf064
--- /dev/null
+++ b/ops/modules/www/cs.tvl.fyi.nix
@@ -0,0 +1,31 @@
+{ config, ... }:
+
+{
+  imports = [
+    ./base.nix
+  ];
+
+  config = {
+    services.nginx.virtualHosts."cs.tvl.fyi" = {
+      serverName = "cs.tvl.fyi";
+      serverAliases = [ "cs.tvl.su" ];
+      enableACME = true;
+      forceSSL = true;
+
+      extraConfig = ''
+        location = / {
+          return 301 https://cs.tvl.fyi/depot;
+        }
+
+        location / {
+          proxy_set_header X-Sg-Auth "Anonymous";
+          proxy_pass http://localhost:${toString config.services.depot.sourcegraph.port};
+        }
+
+        location /users/Anonymous/settings {
+          return 301 https://cs.tvl.fyi;
+        }
+      '';
+    };
+  };
+}
diff --git a/ops/modules/www/deploys.tvl.fyi.nix b/ops/modules/www/deploys.tvl.fyi.nix
new file mode 100644
index 000000000000..ffbe225b58a3
--- /dev/null
+++ b/ops/modules/www/deploys.tvl.fyi.nix
@@ -0,0 +1,22 @@
+{ pkgs, ... }:
+
+{
+  imports = [
+    ./base.nix
+  ];
+
+  config = {
+    # Ensure the directory for deployment diffs exists.
+    systemd.tmpfiles.rules = [
+      "d /var/html/deploys.tvl.fyi/diff 0755 nginx nginx -"
+    ];
+
+    services.nginx.virtualHosts."deploys.tvl.fyi" = {
+      enableACME = true;
+      forceSSL = true;
+      root = "/var/html/deploys.tvl.fyi";
+    };
+
+    services.depot.restic.paths = [ "/var/html/deploys.tvl.fyi" ];
+  };
+}
diff --git a/ops/modules/www/images.tvl.fyi.nix b/ops/modules/www/images.tvl.fyi.nix
new file mode 100644
index 000000000000..7d027b2991ab
--- /dev/null
+++ b/ops/modules/www/images.tvl.fyi.nix
@@ -0,0 +1,22 @@
+{ config, ... }:
+
+{
+  imports = [
+    ./base.nix
+  ];
+
+  config = {
+    services.nginx.virtualHosts."images.tvl.fyi" = {
+      serverName = "images.tvl.fyi";
+      serverAliases = [ "images.tvl.su" ];
+      enableACME = true;
+      forceSSL = true;
+
+      extraConfig = ''
+        location / {
+          proxy_pass http://localhost:${toString config.services.depot.nixery.port};
+        }
+      '';
+    };
+  };
+}
diff --git a/ops/modules/www/nixery.dev.nix b/ops/modules/www/nixery.dev.nix
new file mode 100644
index 000000000000..05dc88c66a07
--- /dev/null
+++ b/ops/modules/www/nixery.dev.nix
@@ -0,0 +1,21 @@
+{ config, ... }:
+
+{
+  imports = [
+    ./base.nix
+  ];
+
+  config = {
+    services.nginx.virtualHosts."nixery.dev" = {
+      serverName = "nixery.dev";
+      enableACME = true;
+      forceSSL = true;
+
+      extraConfig = ''
+        location / {
+          proxy_pass http://localhost:${toString config.services.depot.nixery.port};
+        }
+      '';
+    };
+  };
+}
diff --git a/ops/modules/www/self-redirect.nix b/ops/modules/www/self-redirect.nix
new file mode 100644
index 000000000000..5bf1627be99a
--- /dev/null
+++ b/ops/modules/www/self-redirect.nix
@@ -0,0 +1,27 @@
+# Redirect the hostname of a machine to its configuration in a web
+# browser.
+#
+# Works by convention, assuming that the machine has its configuration
+# at //ops/machines/${hostname}.
+{ config, ... }:
+
+let
+  host = "${config.networking.hostName}.${config.networking.domain}";
+in
+{
+  imports = [
+    ./base.nix
+  ];
+
+  config.services.nginx.virtualHosts."${host}" = {
+    serverName = host;
+    addSSL = true; # SSL is not forced on these redirects
+    enableACME = true;
+
+    extraConfig = ''
+      location = / {
+        return 302 https://at.tvl.fyi/?q=%2F%2Fops%2Fmachines%2F${config.networking.hostName};
+      }
+    '';
+  };
+}
diff --git a/ops/modules/www/static.tvl.fyi.nix b/ops/modules/www/static.tvl.fyi.nix
new file mode 100644
index 000000000000..7312f78ecf42
--- /dev/null
+++ b/ops/modules/www/static.tvl.fyi.nix
@@ -0,0 +1,42 @@
+# Host the static assets at static.tvl.fyi
+#
+# All assets are served from $base/$drvhash/$file, but can also be
+# included with `latest/` which will return a (non-permanent!)
+# redirect to the real location.
+#
+# For all purposes within depot, using the drvhash of web.static is
+# recommended.
+{ depot, pkgs, ... }:
+
+let staticHash = depot.web.static.drvHash;
+in {
+  imports = [
+    ./base.nix
+  ];
+
+  config = {
+    services.nginx.virtualHosts."static.tvl.fyi" = {
+      serverAliases = [ "static.tvl.su" ];
+      enableACME = true;
+      forceSSL = true;
+
+      extraConfig = ''
+        location = / {
+          add_header Content-Type text/plain;
+          return 200 "looking for tvl.fyi or tvl.su?";
+        }
+
+        location /latest {
+          rewrite ^/latest/(.*) /${staticHash}/$1 redirect;
+        }
+
+        location /${staticHash}/ {
+          alias ${depot.web.static}/;
+          expires max;
+          add_header Access-Control-Allow-Origin "*";
+          add_header Cache-Control "public";
+        }
+      '';
+    };
+  };
+}
diff --git a/ops/modules/www/status.tvl.su.nix b/ops/modules/www/status.tvl.su.nix
new file mode 100644
index 000000000000..2bb6093c1472
--- /dev/null
+++ b/ops/modules/www/status.tvl.su.nix
@@ -0,0 +1,25 @@
+{ config, ... }:
+
+{
+  imports = [
+    ./base.nix
+  ];
+
+  config = {
+    services.nginx.virtualHosts."status-fyi" = {
+      serverName = "status.tvl.fyi";
+      enableACME = true;
+      extraConfig = "return 302 https://status.tvl.su$request_uri;";
+    };
+
+    services.nginx.virtualHosts.grafana = {
+      serverName = "status.tvl.su";
+      enableACME = true;
+      forceSSL = true;
+
+      locations."/" = {
+        proxyPass = "http://localhost:${toString config.services.grafana.port}";
+      };
+    };
+  };
+}
diff --git a/ops/modules/www/tazj.in.nix b/ops/modules/www/tazj.in.nix
new file mode 100644
index 000000000000..7d658a5ec4c1
--- /dev/null
+++ b/ops/modules/www/tazj.in.nix
@@ -0,0 +1,40 @@
+# serve tazjin's website & blog
+{ depot, config, lib, pkgs, ... }:
+
+{
+  imports = [
+    ./base.nix
+  ];
+
+  config = {
+    services.nginx.virtualHosts."tazj.in" = {
+      enableACME = true;
+      forceSSL = true;
+      root = depot.users.tazjin.homepage;
+
+      extraConfig = ''
+        ${depot.users.tazjin.blog.oldRedirects}
+        location /blog/ {
+          alias ${depot.users.tazjin.blog.rendered}/;
+
+          if ($request_uri ~ ^/(.*)\.html$) {
+            return 302 /$1;
+          }
+
+          try_files $uri $uri.html $uri/ =404;
+        }
+
+        # Temporary place for serving static files.
+        location /blobs/ {
+          alias /var/lib/tazjins-blobs/;
+        }
+      '';
+    };
+
+    services.nginx.virtualHosts."git.tazj.in" = {
+      enableACME = true;
+      forceSSL = true;
+      extraConfig = "return 301 https://code.tvl.fyi$request_uri;";
+    };
+  };
+}
diff --git a/ops/modules/www/todo.tvl.fyi.nix b/ops/modules/www/todo.tvl.fyi.nix
new file mode 100644
index 000000000000..b53f5437e7ab
--- /dev/null
+++ b/ops/modules/www/todo.tvl.fyi.nix
@@ -0,0 +1,25 @@
+{ depot, ... }:
+
+{
+  imports = [
+    ./base.nix
+  ];
+
+  config = {
+    services.nginx.virtualHosts."todo.tvl.fyi" = {
+      serverName = "todo.tvl.fyi";
+      serverAliases = [ "todo.tvl.su" ];
+      root = depot.web.todolist;
+      enableACME = true;
+      forceSSL = true;
+
+      extraConfig = ''
+        add_header Strict-Transport-Security "max-age=31536000; includeSubDomains; preload" always;
+
+        location ~* \.(webp|woff2)$ {
+          add_header Cache-Control "public, max-age=31536000";
+        }
+      '';
+    };
+  };
+}
diff --git a/ops/modules/www/tvl.fyi.nix b/ops/modules/www/tvl.fyi.nix
new file mode 100644
index 000000000000..59ee1bc27f1a
--- /dev/null
+++ b/ops/modules/www/tvl.fyi.nix
@@ -0,0 +1,47 @@
+{ depot, ... }:
+
+{
+  imports = [
+    ./base.nix
+  ];
+
+  config = {
+    services.nginx.virtualHosts."tvl.fyi" = {
+      serverName = "tvl.fyi";
+      root = depot.web.tvl;
+      enableACME = true;
+      forceSSL = true;
+
+      extraConfig = ''
+        add_header Strict-Transport-Security "max-age=31536000; includeSubDomains; preload" always;
+
+        rewrite ^/builds/?$ https://buildkite.com/tvl/depot/ last;
+
+        rewrite ^/monorepo-doc/?$ https://docs.google.com/document/d/1nnyByXcH0F6GOmEezNOUa2RFelpeRpDToBLYD_CtjWE/edit?usp=sharing last;
+
+        rewrite ^/irc/?$ ircs://irc.hackint.org:6697/#tvl last;
+        rewrite ^/webchat/?$ https://webirc.hackint.org/#ircs://irc.hackint.org/#tvl last;
+
+        location ~* \.(webp|woff2)$ {
+          add_header Cache-Control "public, max-age=31536000";
+        }
+
+        location /blog {
+          if ($request_uri ~ ^/(.*)\.html$) {
+            return 302 /$1;
+          }
+
+          try_files $uri $uri.html $uri/ =404;
+        }
+
+        location = /blog {
+          return 302 /#blog;
+        }
+
+        location = /blog/ {
+          return 302 /#blog;
+        }
+      '';
+    };
+  };
+}
diff --git a/ops/modules/www/tvl.su.nix b/ops/modules/www/tvl.su.nix
new file mode 100644
index 000000000000..a7c4f6a21721
--- /dev/null
+++ b/ops/modules/www/tvl.su.nix
@@ -0,0 +1,20 @@
+{ depot, ... }:
+
+{
+  imports = [
+    ./base.nix
+  ];
+
+  config = {
+    services.nginx.virtualHosts."tvl.su" = {
+      serverName = "tvl.su";
+      root = depot.corp.website;
+      enableACME = true;
+      forceSSL = true;
+
+      extraConfig = ''
+        add_header Strict-Transport-Security "max-age=31536000; includeSubDomains; preload" always;
+      '';
+    };
+  };
+}
diff --git a/ops/modules/www/wigglydonke.rs.nix b/ops/modules/www/wigglydonke.rs.nix
new file mode 100644
index 000000000000..3d85e4eb9843
--- /dev/null
+++ b/ops/modules/www/wigglydonke.rs.nix
@@ -0,0 +1,15 @@
+{ depot, lib, pkgs, ... }:
+
+{
+  imports = [
+    ./base.nix
+  ];
+
+  config = {
+    services.nginx.virtualHosts."wigglydonke.rs" = {
+      enableACME = true;
+      forceSSL = true;
+      root = "${depot.path + "/users/grfn/wigglydonke.rs"}";
+    };
+  };
+}
diff --git a/ops/mq_cli/.gitignore b/ops/mq_cli/.gitignore
new file mode 100644
index 000000000000..5bd19a47c3b3
--- /dev/null
+++ b/ops/mq_cli/.gitignore
@@ -0,0 +1,4 @@
+/target/
+**/*.rs.bk
+.idea/
+*.iml
diff --git a/ops/mq_cli/CODE_OF_CONDUCT.md b/ops/mq_cli/CODE_OF_CONDUCT.md
new file mode 100644
index 000000000000..c4013ac13ebc
--- /dev/null
+++ b/ops/mq_cli/CODE_OF_CONDUCT.md
@@ -0,0 +1,20 @@
+A SERMON ON ETHICS AND LOVE
+===========================
+
+One day Mal-2 asked the messenger spirit Saint Gulik to approach the Goddess and request Her presence for some desperate advice. Shortly afterwards the radio came on by itself, and an ethereal female Voice said **YES?**
+
+"O! Eris! Blessed Mother of Man! Queen of Chaos! Daughter of Discord! Concubine of Confusion! O! Exquisite Lady, I beseech You to lift a heavy burden from my heart!"
+
+**WHAT BOTHERS YOU, MAL? YOU DON'T SOUND WELL.**
+
+"I am filled with fear and tormented with terrible visions of pain. Everywhere people are hurting one another, the planet is rampant with injustices, whole societies plunder groups of their own people, mothers imprison sons, children perish while brothers war. O, woe."
+
+**WHAT IS THE MATTER WITH THAT, IF IT IS WHAT YOU WANT TO DO?**
+
+"But nobody Wants it! Everybody hates it."
+
+**OH. WELL, THEN *STOP*.**
+
+At which moment She turned herself into an aspirin commercial and left The Polyfather stranded alone with his species.
+
+SINISTER DEXTER HAS A BROKEN SPIROMETER.
diff --git a/ops/mq_cli/Cargo.lock b/ops/mq_cli/Cargo.lock
new file mode 100644
index 000000000000..18fed3621d4d
--- /dev/null
+++ b/ops/mq_cli/Cargo.lock
@@ -0,0 +1,168 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "ansi_term"
+version = "0.12.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d52a9bb7ec0cf484c551830a7ce27bd20d67eac647e1befb56b0be4ee39a55d2"
+dependencies = [
+ "winapi",
+]
+
+[[package]]
+name = "atty"
+version = "0.2.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d9b39be18770d11421cdb1b9947a45dd3f37e93092cbf377614828a319d5fee8"
+dependencies = [
+ "hermit-abi",
+ "libc",
+ "winapi",
+]
+
+[[package]]
+name = "autocfg"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cdb031dd78e28731d87d56cc8ffef4a8f36ca26c38fe2de700543e627f8a464a"
+
+[[package]]
+name = "bitflags"
+version = "1.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
+
+[[package]]
+name = "cc"
+version = "1.0.72"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "22a9137b95ea06864e018375b72adfb7db6e6f68cfc8df5a04d00288050485ee"
+
+[[package]]
+name = "cfg-if"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
+
+[[package]]
+name = "clap"
+version = "2.34.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a0610544180c38b88101fecf2dd634b174a62eef6946f84dfc6a7127512b381c"
+dependencies = [
+ "ansi_term",
+ "atty",
+ "bitflags",
+ "strsim",
+ "textwrap",
+ "unicode-width",
+ "vec_map",
+]
+
+[[package]]
+name = "hermit-abi"
+version = "0.1.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "62b467343b94ba476dcb2500d242dadbb39557df889310ac77c5d99100aaac33"
+dependencies = [
+ "libc",
+]
+
+[[package]]
+name = "libc"
+version = "0.2.117"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e74d72e0f9b65b5b4ca49a346af3976df0f9c61d550727f349ecd559f251a26c"
+
+[[package]]
+name = "memoffset"
+version = "0.6.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5aa361d4faea93603064a027415f07bd8e1d5c88c9fbf68bf56a285428fd79ce"
+dependencies = [
+ "autocfg",
+]
+
+[[package]]
+name = "mq_cli"
+version = "3773.0.0"
+dependencies = [
+ "clap",
+ "libc",
+ "nix",
+ "posix_mq",
+]
+
+[[package]]
+name = "nix"
+version = "0.23.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9f866317acbd3a240710c63f065ffb1e4fd466259045ccb504130b7f668f35c6"
+dependencies = [
+ "bitflags",
+ "cc",
+ "cfg-if",
+ "libc",
+ "memoffset",
+]
+
+[[package]]
+name = "posix_mq"
+version = "3771.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f462ad79a99ea13f3ef76d9c271956e924183f5aeb67a8649c8c2b6bdd079da8"
+dependencies = [
+ "libc",
+ "nix",
+]
+
+[[package]]
+name = "strsim"
+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8ea5119cdb4c55b55d432abb513a0429384878c15dde60cc77b1c99de1a95a6a"
+
+[[package]]
+name = "textwrap"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d326610f408c7a4eb6f51c37c330e496b08506c9457c9d34287ecc38809fb060"
+dependencies = [
+ "unicode-width",
+]
+
+[[package]]
+name = "unicode-width"
+version = "0.1.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3ed742d4ea2bd1176e236172c8429aaf54486e7ac098db29ffe6529e0ce50973"
+
+[[package]]
+name = "vec_map"
+version = "0.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f1bddf1187be692e79c5ffeab891132dfb0f236ed36a43c7ed39f1165ee20191"
+
+[[package]]
+name = "winapi"
+version = "0.3.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
+dependencies = [
+ "winapi-i686-pc-windows-gnu",
+ "winapi-x86_64-pc-windows-gnu",
+]
+
+[[package]]
+name = "winapi-i686-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
+
+[[package]]
+name = "winapi-x86_64-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
diff --git a/ops/mq_cli/Cargo.toml b/ops/mq_cli/Cargo.toml
new file mode 100644
index 000000000000..816a37075977
--- /dev/null
+++ b/ops/mq_cli/Cargo.toml
@@ -0,0 +1,14 @@
+[package]
+name = "mq_cli"
+description = "CLI tool for accessing POSIX message queues (mq_overview(7))"
+license = "MIT"
+version = "3773.0.0"
+authors = ["Vincent Ambo <tazjin@tvl.su>"]
+homepage = "https://cs.tvl.fyi/depot/-/tree/ops/mq_cli"
+repository = "https://code.tvl.fyi/depot.git:/ops/mq_cli.git"
+
+[dependencies]
+clap = "2.34"
+libc = "0.2"
+nix = "0.23"
+posix_mq = "3771.0.0"
diff --git a/ops/mq_cli/LICENSE b/ops/mq_cli/LICENSE
new file mode 100644
index 000000000000..e289cbab81e0
--- /dev/null
+++ b/ops/mq_cli/LICENSE
@@ -0,0 +1,22 @@
+MIT License
+
+Copyright (c) 2017-2018 Langler AS
+Copyright (c) 2019-2020 Vincent Ambo
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/ops/mq_cli/README.md b/ops/mq_cli/README.md
new file mode 100644
index 000000000000..1045de896b02
--- /dev/null
+++ b/ops/mq_cli/README.md
@@ -0,0 +1,42 @@
+mq-cli
+======
+
+This project provides a very simple CLI interface to [POSIX message queues][].
+
+It can be used to create and inspect queues, as well as send and
+receive messages from them.
+
+```
+1.0.0
+Administrate and inspect POSIX message queues
+
+USAGE:
+    mq <SUBCOMMAND>
+
+FLAGS:
+    -h, --help       Prints help information
+    -V, --version    Prints version information
+
+SUBCOMMANDS:
+    create     Create a new queue
+    help       Prints this message or the help of the given subcommand(s)
+    inspect    inspect details about a queue
+    ls         list message queues
+    receive    Receive a message from a queue
+    rlimit     Get the message queue rlimit
+    send       Send a message to a queue
+```
+
+## Development
+
+Development happens in the [TVL
+monorepo](https://cs.tvl.fyi/depot/-/tree/ops/mq_cli).
+
+Starting from version `3773.0.0`, the version numbers correspond to
+_revisions_ of the TVL repository, available as git refs (e.g.
+`refs/r/3773`).
+
+See the TVL documentation for more information about how to contribute
+to the codebase.
+
+[POSIX message queues]: https://linux.die.net/man/7/mq_overview
diff --git a/ops/mq_cli/default.nix b/ops/mq_cli/default.nix
new file mode 100644
index 000000000000..6b0e32009a66
--- /dev/null
+++ b/ops/mq_cli/default.nix
@@ -0,0 +1,3 @@
+{ depot, ... }:
+
+depot.third_party.naersk.buildPackage ./.
diff --git a/ops/mq_cli/src/main.rs b/ops/mq_cli/src/main.rs
new file mode 100644
index 000000000000..927993b486ad
--- /dev/null
+++ b/ops/mq_cli/src/main.rs
@@ -0,0 +1,235 @@
+extern crate clap;
+extern crate libc;
+extern crate nix;
+extern crate posix_mq;
+
+use clap::{App, AppSettings, Arg, ArgMatches, SubCommand};
+use posix_mq::{Message, Name, Queue};
+use std::fs::{read_dir, File};
+use std::io::{self, Read, Write};
+use std::process::exit;
+
+fn run_ls() {
+    let mqueues = read_dir("/dev/mqueue").expect("Could not read message queues");
+
+    for queue in mqueues {
+        let path = queue.unwrap().path();
+        let status = {
+            let mut file = File::open(&path).expect("Could not open queue file");
+
+            let mut content = String::new();
+            file.read_to_string(&mut content)
+                .expect("Could not read queue file");
+
+            content
+        };
+
+        let queue_name = path
+            .components()
+            .last()
+            .unwrap()
+            .as_os_str()
+            .to_string_lossy();
+
+        println!("/{}: {}", queue_name, status)
+    }
+}
+
+fn run_inspect(queue_name: &str) {
+    let name = Name::new(queue_name).expect("Invalid queue name");
+    let queue = Queue::open(name).expect("Could not open queue");
+
+    println!("Queue {}:\n", queue_name);
+    println!("Max. message size: {} bytes", queue.max_size());
+    println!("Max. # of pending messages: {}", queue.max_pending());
+}
+
+fn run_create(cmd: &ArgMatches) {
+    if let Some(rlimit) = cmd.value_of("rlimit") {
+        set_rlimit(rlimit.parse().expect("Invalid rlimit value"));
+    }
+
+    let name = Name::new(cmd.value_of("queue").unwrap()).expect("Invalid queue name");
+
+    let max_pending: i64 = cmd.value_of("max-pending").unwrap().parse().unwrap();
+    let max_size: i64 = cmd.value_of("max-size").unwrap().parse().unwrap();
+
+    let queue = Queue::create(name, max_pending, max_size * 1024);
+
+    match queue {
+        Ok(_) => println!("Queue created successfully"),
+        Err(e) => {
+            writeln!(io::stderr(), "Could not create queue: {}", e).ok();
+            exit(1);
+        }
+    };
+}
+
+fn run_receive(queue_name: &str) {
+    let name = Name::new(queue_name).expect("Invalid queue name");
+    let queue = Queue::open(name).expect("Could not open queue");
+
+    let message = match queue.receive() {
+        Ok(msg) => msg,
+        Err(e) => {
+            writeln!(io::stderr(), "Failed to receive message: {}", e).ok();
+            exit(1);
+        }
+    };
+
+    // Attempt to write the message out as a string, but write out raw bytes if it turns out to not
+    // be UTF-8 encoded data.
+    match String::from_utf8(message.data.clone()) {
+        Ok(string) => println!("{}", string),
+        Err(_) => {
+            writeln!(io::stderr(), "Message not UTF-8 encoded!").ok();
+            io::stdout().write(message.data.as_ref()).ok();
+        }
+    };
+}
+
+fn run_send(queue_name: &str, content: &str) {
+    let name = Name::new(queue_name).expect("Invalid queue name");
+    let queue = Queue::open(name).expect("Could not open queue");
+
+    let message = Message {
+        data: content.as_bytes().to_vec(),
+        priority: 0,
+    };
+
+    match queue.send(&message) {
+        Ok(_) => (),
+        Err(e) => {
+            writeln!(io::stderr(), "Could not send message: {}", e).ok();
+            exit(1);
+        }
+    }
+}
+
+fn run_rlimit() {
+    let mut rlimit = libc::rlimit {
+        rlim_cur: 0,
+        rlim_max: 0,
+    };
+
+    let mut errno = 0;
+    unsafe {
+        let res = libc::getrlimit(libc::RLIMIT_MSGQUEUE, &mut rlimit);
+        if res != 0 {
+            errno = nix::errno::errno();
+        }
+    };
+
+    if errno != 0 {
+        writeln!(
+            io::stderr(),
+            "Could not get message queue rlimit: {}",
+            errno
+        )
+        .ok();
+    } else {
+        println!("Message queue rlimit:");
+        println!("Current limit: {}", rlimit.rlim_cur);
+        println!("Maximum limit: {}", rlimit.rlim_max);
+    }
+}
+
+fn set_rlimit(new_limit: u64) {
+    let rlimit = libc::rlimit {
+        rlim_cur: new_limit,
+        rlim_max: new_limit,
+    };
+
+    let mut errno: i32 = 0;
+    unsafe {
+        let res = libc::setrlimit(libc::RLIMIT_MSGQUEUE, &rlimit);
+        if res != 0 {
+            errno = nix::errno::errno();
+        }
+    }
+
+    match errno {
+        0 => println!("Set RLIMIT_MSGQUEUE hard limit to {}", new_limit),
+        _ => {
+            // Not mapping these error codes to messages for now, the user can
+            // look up the meaning in setrlimit(2).
+            panic!("Could not set hard limit: {}", errno);
+        }
+    };
+}
+
+fn main() {
+    let ls = SubCommand::with_name("ls").about("list message queues");
+
+    let queue_arg = Arg::with_name("queue").required(true).takes_value(true);
+
+    let rlimit_arg = Arg::with_name("rlimit")
+        .help("RLIMIT_MSGQUEUE to set for this command")
+        .long("rlimit")
+        .takes_value(true);
+
+    let inspect = SubCommand::with_name("inspect")
+        .about("inspect details about a queue")
+        .arg(&queue_arg);
+
+    let create = SubCommand::with_name("create")
+        .about("Create a new queue")
+        .arg(&queue_arg)
+        .arg(&rlimit_arg)
+        .arg(
+            Arg::with_name("max-size")
+                .help("maximum message size (in kB)")
+                .long("max-size")
+                .required(true)
+                .takes_value(true),
+        )
+        .arg(
+            Arg::with_name("max-pending")
+                .help("maximum # of pending messages")
+                .long("max-pending")
+                .required(true)
+                .takes_value(true),
+        );
+
+    let receive = SubCommand::with_name("receive")
+        .about("Receive a message from a queue")
+        .arg(&queue_arg);
+
+    let send = SubCommand::with_name("send")
+        .about("Send a message to a queue")
+        .arg(&queue_arg)
+        .arg(
+            Arg::with_name("message")
+                .help("the message to send")
+                .required(true),
+        );
+
+    let rlimit = SubCommand::with_name("rlimit")
+        .about("Get the message queue rlimit")
+        .setting(AppSettings::SubcommandRequiredElseHelp);
+
+    let matches = App::new("mq")
+        .setting(AppSettings::SubcommandRequiredElseHelp)
+        .version("1.0.0")
+        .about("Administrate and inspect POSIX message queues")
+        .subcommand(ls)
+        .subcommand(inspect)
+        .subcommand(create)
+        .subcommand(receive)
+        .subcommand(send)
+        .subcommand(rlimit)
+        .get_matches();
+
+    match matches.subcommand() {
+        ("ls", _) => run_ls(),
+        ("inspect", Some(cmd)) => run_inspect(cmd.value_of("queue").unwrap()),
+        ("create", Some(cmd)) => run_create(cmd),
+        ("receive", Some(cmd)) => run_receive(cmd.value_of("queue").unwrap()),
+        ("send", Some(cmd)) => run_send(
+            cmd.value_of("queue").unwrap(),
+            cmd.value_of("message").unwrap(),
+        ),
+        ("rlimit", _) => run_rlimit(),
+        _ => unimplemented!(),
+    }
+}
diff --git a/ops/nixos.nix b/ops/nixos.nix
new file mode 100644
index 000000000000..309f12297744
--- /dev/null
+++ b/ops/nixos.nix
@@ -0,0 +1,63 @@
+# Helper functions for instantiating depot-compatible NixOS machines.
+{ depot, lib, pkgs, ... }@args:
+
+let inherit (lib) findFirst isAttrs;
+in rec {
+  # This provides our standard set of arguments to all NixOS modules.
+  baseModule = { ... }: {
+    # Ensure that pkgs == third_party.nix
+    nixpkgs.pkgs = depot.third_party.nixpkgs;
+    nix.nixPath =
+      let
+        # Due to nixpkgsBisectPath, pkgs.path is not always in the nix store
+        nixpkgsStorePath =
+          if lib.hasPrefix builtins.storeDir (toString pkgs.path)
+          then builtins.storePath pkgs.path # nixpkgs is already in the store
+          else pkgs.path; # we need to dump nixpkgs to the store either way
+      in
+      [
+        ("nixos=" + nixpkgsStorePath)
+        ("nixpkgs=" + nixpkgsStorePath)
+      ];
+  };
+
+  nixosFor = configuration: (depot.third_party.nixos {
+    configuration = { ... }: {
+      imports = [
+        baseModule
+        configuration
+      ];
+    };
+
+    specialArgs = {
+      inherit (args) depot;
+    };
+  });
+
+  findSystem = hostname:
+    (findFirst
+      (system: system.config.networking.hostName == hostname)
+      (throw "${hostname} is not a known NixOS host")
+      (map nixosFor depot.ops.machines.all-systems));
+
+  rebuild-system = rebuildSystemWith depot.path;
+
+  rebuildSystemWith = depotPath: pkgs.writeShellScriptBin "rebuild-system" ''
+    set -ue
+    if [[ $EUID -ne 0 ]]; then
+      echo "Oh no! Only root is allowed to rebuild the system!" >&2
+      exit 1
+    fi
+
+    echo "Rebuilding NixOS for $HOSTNAME"
+    system=$(${pkgs.nix}/bin/nix-build -E "((import ${depotPath} {}).ops.nixos.findSystem \"$HOSTNAME\").system" --no-out-link --show-trace)
+
+    ${pkgs.nix}/bin/nix-env -p /nix/var/nix/profiles/system --set $system
+    $system/bin/switch-to-configuration switch
+  '';
+
+  # Systems that should be built in CI
+  whitbySystem = (nixosFor depot.ops.machines.whitby).system;
+  sandunySystem = (nixosFor depot.ops.machines.sanduny).system;
+  meta.ci.targets = [ "sandunySystem" "whitbySystem" ];
+}
diff --git a/ops/pipelines/README.md b/ops/pipelines/README.md
new file mode 100644
index 000000000000..a3f94fd23143
--- /dev/null
+++ b/ops/pipelines/README.md
@@ -0,0 +1,5 @@
+This folder contains the dynamic configuration for our [Buildkite CI
+setup](https://tvl.fyi/builds).
+
+The configuration is built and dynamically loaded by Buildkite at the start of
+each CI pipeline.
diff --git a/ops/pipelines/depot.nix b/ops/pipelines/depot.nix
new file mode 100644
index 000000000000..6d9e625e04be
--- /dev/null
+++ b/ops/pipelines/depot.nix
@@ -0,0 +1,49 @@
+# This file configures the primary build pipeline used for the
+# top-level list of depot targets.
+{ depot, pkgs, externalArgs, ... }:
+
+let
+  # Protobuf check step which validates that changes to .proto files
+  # between revisions don't cause backwards-incompatible or otherwise
+  # flawed changes.
+  protoCheck = {
+    command = "${depot.nix.bufCheck}/bin/ci-buf-check";
+    label = ":water_buffalo:";
+  };
+
+  pipeline = depot.nix.buildkite.mkPipeline {
+    headBranch = "refs/heads/canon";
+    drvTargets = depot.ci.targets;
+    additionalSteps = [ protoCheck ];
+
+    parentTargetMap =
+      if (externalArgs ? parentTargetMap)
+      then builtins.fromJSON (builtins.readFile externalArgs.parentTargetMap)
+      else { };
+
+    postBuildSteps = [
+      # After successful builds, create a gcroot for builds on canon.
+      #
+      # This anchors *most* of the depot, in practice it's unimportant
+      # if there is a build race and we get +-1 of the targets.
+      #
+      # Unfortunately this requires a third evaluation of the graph, but
+      # since it happens after :duck: it should not affect the timing of
+      # status reporting back to Gerrit.
+      {
+        label = ":anchor:";
+        branches = "refs/heads/canon";
+        command = ''
+          nix-build -A ci.gcroot --out-link /nix/var/nix/gcroots/depot/canon
+        '';
+      }
+    ];
+  };
+
+  drvmap = depot.nix.buildkite.mkDrvmap depot.ci.targets;
+in
+pkgs.runCommandNoCC "depot-pipeline" { } ''
+  mkdir $out
+  cp -r ${pipeline}/* $out
+  cp ${drvmap} $out/drvmap.json
+''
diff --git a/ops/pipelines/static-pipeline.yaml b/ops/pipelines/static-pipeline.yaml
new file mode 100644
index 000000000000..2e35a8a17914
--- /dev/null
+++ b/ops/pipelines/static-pipeline.yaml
@@ -0,0 +1,116 @@
+# This file defines the static Buildkite pipeline which attempts to
+# create the dynamic pipeline of all depot targets.
+#
+# If something fails during the creation of the pipeline, the fallback
+# is executed instead which will simply report an error to Gerrit.
+---
+env:
+  BUILDKITE_TOKEN_PATH: /run/agenix/buildkite-graphql-token
+steps:
+  # Run pipeline for tvl-kit when new commits arrive on canon. Since
+  # it is not part of the depot build tree, this is a useful
+  # verification to ensure we don't break external things (too much).
+  - trigger: "tvl-kit"
+    async: true
+    label: ":fork:"
+    branches: "refs/heads/canon"
+    build:
+      message: "Verification triggered by ${BUILDKITE_COMMIT}"
+
+  # Create a revision number for the current commit for builds on
+  # canon.
+  #
+  # This writes data back to Gerrit using the Buildkite agent
+  # credentials injected through a git credentials helper.
+  #
+  # Revision numbers are defined as the number of commits in the
+  # lineage of HEAD, following only the first parent of merges.
+  - label: ":git:"
+    branches: "refs/heads/canon"
+    command: |
+      git -c 'credential.helper=gerrit-creds' \
+        push origin "HEAD:refs/r/$(git rev-list --count --first-parent HEAD)"
+
+  # Generate & upload dynamic build steps
+  - label: ":llama:"
+    key: "pipeline-gen"
+    command: |
+      set -ue
+
+      if test -n "$${GERRIT_CHANGE_URL-}"; then
+        echo "This is a build of [cl/$$GERRIT_CHANGE_ID]($$GERRIT_CHANGE_URL) (at patchset #$$GERRIT_PATCHSET)" | \
+          buildkite-agent annotate
+      fi
+
+      # Attempt to fetch a target map from a parent commit on canon,
+      # except on builds of canon itself.
+      [ "${BUILDKITE_BRANCH}" != "refs/heads/canon" ] && \
+        nix/buildkite/fetch-parent-targets.sh
+
+      PIPELINE_ARGS=""
+      if [[ -f tmp/parent-target-map.json ]]; then
+        PIPELINE_ARGS="--arg parentTargetMap tmp/parent-target-map.json"
+      fi
+
+      nix-build --option restrict-eval true --include "depot=$${PWD}"\
+        --allowed-uris 'https://' \
+        -A ops.pipelines.depot \
+        -o pipeline --show-trace $$PIPELINE_ARGS
+
+      # Steps need to be uploaded in reverse order because pipeline
+      # upload prepends instead of appending.
+      ls pipeline/build-chunk-*.json | tac | while read chunk; do
+        buildkite-agent pipeline upload $$chunk
+      done
+
+      buildkite-agent artifact upload "pipeline/*"
+
+  # Wait for all previous steps to complete.
+  - wait: null
+    continue_on_failure: true
+
+  # Exit with success or failure depending on whether any other steps
+  # failed.
+  #
+  # This information is checked by querying the Buildkite GraphQL API
+  # and fetching the count of failed steps.
+  #
+  # This step must be :duck: (yes, really!) because the post-command
+  # hook will inspect this name.
+  #
+  # Note that this step has requirements for the agent environment, which
+  # are enforced in our NixOS configuration:
+  #
+  #  * curl and jq must be on the $PATH of build agents
+  #  * besadii configuration must be readable to the build agents
+  - label: ":duck:"
+    key: ":duck:"
+    command: |
+      set -ueo pipefail
+
+      readonly FAILED_JOBS=$(curl 'https://graphql.buildkite.com/v1' \
+        --silent \
+        -H "Authorization: Bearer $(cat ${BUILDKITE_TOKEN_PATH})" \
+        -d "{\"query\": \"query BuildStatusQuery { build(uuid: \\\"$BUILDKITE_BUILD_ID\\\") { jobs(passed: false) { count } } }\"}" | \
+        jq -r '.data.build.jobs.count')
+
+      echo "$$FAILED_JOBS build jobs failed."
+
+      if (( $$FAILED_JOBS > 0 )); then
+        exit 1
+      fi
+
+  # After duck, on success, upload and run any post-build steps that
+  # were output by the dynamic pipeline.
+  - label: ":arrow_heading_down:"
+    depends_on:
+      - step: ":duck:"
+        allow_failure: false
+    command: |
+      set -ueo pipefail
+
+      buildkite-agent artifact download "pipeline/*" .
+
+      find ./pipeline -name 'post-chunk-*.json' | tac | while read chunk; do
+        buildkite-agent pipeline upload $$chunk
+      done
diff --git a/ops/posix_mq.rs/.gitignore b/ops/posix_mq.rs/.gitignore
new file mode 100644
index 000000000000..e5b6fdb28e32
--- /dev/null
+++ b/ops/posix_mq.rs/.gitignore
@@ -0,0 +1,3 @@
+/target/
+**/*.rs.bk
+.idea/
diff --git a/ops/posix_mq.rs/CODE_OF_CONDUCT.md b/ops/posix_mq.rs/CODE_OF_CONDUCT.md
new file mode 100644
index 000000000000..c4013ac13ebc
--- /dev/null
+++ b/ops/posix_mq.rs/CODE_OF_CONDUCT.md
@@ -0,0 +1,20 @@
+A SERMON ON ETHICS AND LOVE
+===========================
+
+One day Mal-2 asked the messenger spirit Saint Gulik to approach the Goddess and request Her presence for some desperate advice. Shortly afterwards the radio came on by itself, and an ethereal female Voice said **YES?**
+
+"O! Eris! Blessed Mother of Man! Queen of Chaos! Daughter of Discord! Concubine of Confusion! O! Exquisite Lady, I beseech You to lift a heavy burden from my heart!"
+
+**WHAT BOTHERS YOU, MAL? YOU DON'T SOUND WELL.**
+
+"I am filled with fear and tormented with terrible visions of pain. Everywhere people are hurting one another, the planet is rampant with injustices, whole societies plunder groups of their own people, mothers imprison sons, children perish while brothers war. O, woe."
+
+**WHAT IS THE MATTER WITH THAT, IF IT IS WHAT YOU WANT TO DO?**
+
+"But nobody Wants it! Everybody hates it."
+
+**OH. WELL, THEN *STOP*.**
+
+At which moment She turned herself into an aspirin commercial and left The Polyfather stranded alone with his species.
+
+SINISTER DEXTER HAS A BROKEN SPIROMETER.
diff --git a/ops/posix_mq.rs/Cargo.lock b/ops/posix_mq.rs/Cargo.lock
new file mode 100644
index 000000000000..dc344613d052
--- /dev/null
+++ b/ops/posix_mq.rs/Cargo.lock
@@ -0,0 +1,63 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "autocfg"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cdb031dd78e28731d87d56cc8ffef4a8f36ca26c38fe2de700543e627f8a464a"
+
+[[package]]
+name = "bitflags"
+version = "1.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cf1de2fe8c75bc145a2f577add951f8134889b4795d47466a54a5c846d691693"
+
+[[package]]
+name = "cc"
+version = "1.0.50"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "95e28fa049fda1c330bcf9d723be7663a899c4679724b34c81e9f5a326aab8cd"
+
+[[package]]
+name = "cfg-if"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
+
+[[package]]
+name = "libc"
+version = "0.2.117"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e74d72e0f9b65b5b4ca49a346af3976df0f9c61d550727f349ecd559f251a26c"
+
+[[package]]
+name = "memoffset"
+version = "0.6.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5aa361d4faea93603064a027415f07bd8e1d5c88c9fbf68bf56a285428fd79ce"
+dependencies = [
+ "autocfg",
+]
+
+[[package]]
+name = "nix"
+version = "0.23.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9f866317acbd3a240710c63f065ffb1e4fd466259045ccb504130b7f668f35c6"
+dependencies = [
+ "bitflags",
+ "cc",
+ "cfg-if",
+ "libc",
+ "memoffset",
+]
+
+[[package]]
+name = "posix_mq"
+version = "3771.0.0"
+dependencies = [
+ "libc",
+ "nix",
+]
diff --git a/ops/posix_mq.rs/Cargo.toml b/ops/posix_mq.rs/Cargo.toml
new file mode 100644
index 000000000000..8390b80b86f0
--- /dev/null
+++ b/ops/posix_mq.rs/Cargo.toml
@@ -0,0 +1,12 @@
+[package]
+name = "posix_mq"
+version = "3771.0.0"
+authors = ["Vincent Ambo <tazjin@tvl.su>"]
+description = "(Higher-level) Rust bindings to POSIX message queues"
+license = "MIT"
+homepage = "https://cs.tvl.fyi/depot/-/tree/ops/posix_mq.rs"
+repository = "https://code.tvl.fyi/depot.git:/ops/posix_mq.rs.git"
+
+[dependencies]
+nix = "0.23"
+libc = "0.2"
diff --git a/ops/posix_mq.rs/LICENSE b/ops/posix_mq.rs/LICENSE
new file mode 100644
index 000000000000..2389546b1383
--- /dev/null
+++ b/ops/posix_mq.rs/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2017-2020 Vincent Ambo
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/ops/posix_mq.rs/README.md b/ops/posix_mq.rs/README.md
new file mode 100644
index 000000000000..800d2221e492
--- /dev/null
+++ b/ops/posix_mq.rs/README.md
@@ -0,0 +1,44 @@
+posix_mq
+========
+
+[![crates.io](https://img.shields.io/crates/v/posix_mq.svg)](https://crates.io/crates/posix_mq)
+
+This is a simple, relatively high-level library for the POSIX [message queue API][]. It wraps the lower-level API in a
+simpler interface with more robust error handling.
+
+Check out this project's [sister library][] in Kotlin.
+
+Usage example:
+
+```rust
+// Values that need to undergo validation are wrapped in safe types:
+let name = Name::new("/test-queue").unwrap();
+
+// Queue creation with system defaults is simple:
+let queue = Queue::open_or_create(name).expect("Opening queue failed");
+
+// Sending a message:
+let message = Message {
+  data: "test-message".as_bytes().to_vec(),
+  priority: 0,
+};
+queue.send(&message).expect("message sending failed");
+
+// ... and receiving it!
+let result = queue.receive().expect("message receiving failed");
+```
+
+## Development
+
+Development happens in the [TVL
+monorepo](https://cs.tvl.fyi/depot/-/tree/ops/posix_mq.rs).
+
+Starting from version `3771.0.0`, the version numbers correspond to
+_revisions_ of the TVL repository, available as git refs (e.g.
+`refs/r/3771`).
+
+See the TVL documentation for more information about how to contribute
+to the codebase.
+
+[message queue API]: https://linux.die.net/man/7/mq_overview
+[sister library]: https://github.com/aprilabank/posix_mq.kt
diff --git a/ops/posix_mq.rs/default.nix b/ops/posix_mq.rs/default.nix
new file mode 100644
index 000000000000..6b0e32009a66
--- /dev/null
+++ b/ops/posix_mq.rs/default.nix
@@ -0,0 +1,3 @@
+{ depot, ... }:
+
+depot.third_party.naersk.buildPackage ./.
diff --git a/ops/posix_mq.rs/src/error.rs b/ops/posix_mq.rs/src/error.rs
new file mode 100644
index 000000000000..bacd2aeb39e0
--- /dev/null
+++ b/ops/posix_mq.rs/src/error.rs
@@ -0,0 +1,122 @@
+use nix;
+use std::{error, fmt, io, num};
+
+/// This module implements a simple error type to match the errors that can be thrown from the C
+/// functions as well as some extra errors resulting from internal validations.
+///
+/// As this crate exposes an opinionated API to the POSIX queues certain errors have been
+/// ignored:
+///
+/// * ETIMEDOUT: The low-level timed functions are not exported and this error can not occur.
+/// * EAGAIN: Non-blocking queue calls are not supported.
+/// * EINVAL: Same reason as ETIMEDOUT
+/// * EMSGSIZE: The message size is immutable after queue creation and this crate checks it.
+/// * ENAMETOOLONG: This crate performs name validation
+///
+/// If an unexpected error is encountered it will be wrapped appropriately and should be reported
+/// as a bug on https://b.tvl.fyi
+
+#[derive(Debug)]
+pub enum Error {
+    // These errors are raised inside of the library
+    InvalidQueueName(&'static str),
+    ValueReadingError(io::Error),
+    MessageSizeExceeded(),
+    MaximumMessageSizeExceeded(),
+    MaximumMessageCountExceeded(),
+
+    // These errors match what is described in the man pages (from mq_overview(7) onwards).
+    PermissionDenied(),
+    InvalidQueueDescriptor(),
+    QueueCallInterrupted(),
+    QueueAlreadyExists(),
+    QueueNotFound(),
+    InsufficientMemory(),
+    InsufficientSpace(),
+
+    // These two are (hopefully) unlikely in modern systems
+    ProcessFileDescriptorLimitReached(),
+    SystemFileDescriptorLimitReached(),
+
+    // If an unhandled / unknown / unexpected error occurs this error will be used.
+    // In those cases bug reports would be welcome!
+    UnknownForeignError(nix::errno::Errno),
+
+    // Some other unexpected / unknown error occured. This is probably an error from
+    // the nix crate. Bug reports also welcome for this!
+    UnknownInternalError(),
+}
+
+impl fmt::Display for Error {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        use Error::*;
+        f.write_str(match *self {
+            // This error contains more sensible description strings already
+            InvalidQueueName(e) => e,
+            ValueReadingError(_) => "error reading system configuration for message queues",
+            MessageSizeExceeded() => "message is larger than maximum size for specified queue",
+            MaximumMessageSizeExceeded() => "specified queue message size exceeds system maximum",
+            MaximumMessageCountExceeded() => "specified queue message count exceeds system maximum",
+            PermissionDenied() => "permission to the specified queue was denied",
+            InvalidQueueDescriptor() => "the internal queue descriptor was invalid",
+            QueueCallInterrupted() => "queue method interrupted by signal",
+            QueueAlreadyExists() => "the specified queue already exists",
+            QueueNotFound() => "the specified queue could not be found",
+            InsufficientMemory() => "insufficient memory to call queue method",
+            InsufficientSpace() => "insufficient space to call queue method",
+            ProcessFileDescriptorLimitReached() => {
+                "maximum number of process file descriptors reached"
+            }
+            SystemFileDescriptorLimitReached() => {
+                "maximum number of system file descriptors reached"
+            }
+            UnknownForeignError(_) => "unknown foreign error occured: please report a bug!",
+            UnknownInternalError() => "unknown internal error occured: please report a bug!",
+        })
+    }
+}
+
+impl error::Error for Error {
+    fn source(&self) -> Option<&(dyn error::Error + 'static)> {
+        match self {
+            Error::ValueReadingError(e) => Some(e),
+            Error::UnknownForeignError(e) => Some(e),
+            _ => None,
+        }
+    }
+}
+
+/// This from implementation is used to translate errors from the lower-level
+/// C-calls into sensible Rust errors.
+impl From<nix::errno::Errno> for Error {
+    fn from(err: nix::Error) -> Self {
+        use nix::errno::Errno::*;
+        match err {
+            EACCES => Error::PermissionDenied(),
+            EBADF => Error::InvalidQueueDescriptor(),
+            EINTR => Error::QueueCallInterrupted(),
+            EEXIST => Error::QueueAlreadyExists(),
+            EMFILE => Error::ProcessFileDescriptorLimitReached(),
+            ENFILE => Error::SystemFileDescriptorLimitReached(),
+            ENOENT => Error::QueueNotFound(),
+            ENOMEM => Error::InsufficientMemory(),
+            ENOSPC => Error::InsufficientSpace(),
+            _ => Error::UnknownForeignError(err),
+        }
+    }
+}
+
+// This implementation is used when reading system queue settings.
+impl From<io::Error> for Error {
+    fn from(e: io::Error) -> Self {
+        Error::ValueReadingError(e)
+    }
+}
+
+// This implementation is used when parsing system queue settings. The unknown error is returned
+// here because the system is probably seriously broken if those files don't contain numbers.
+impl From<num::ParseIntError> for Error {
+    fn from(_: num::ParseIntError) -> Self {
+        Error::UnknownInternalError()
+    }
+}
diff --git a/ops/posix_mq.rs/src/lib.rs b/ops/posix_mq.rs/src/lib.rs
new file mode 100644
index 000000000000..ed35fb03be82
--- /dev/null
+++ b/ops/posix_mq.rs/src/lib.rs
@@ -0,0 +1,247 @@
+extern crate libc;
+extern crate nix;
+
+use error::Error;
+use libc::mqd_t;
+use nix::mqueue;
+use nix::sys::stat;
+use std::ffi::CString;
+use std::fs::File;
+use std::io::Read;
+use std::ops::Drop;
+use std::string::ToString;
+
+pub mod error;
+
+#[cfg(test)]
+mod tests;
+
+/// Wrapper type for queue names that performs basic validation of queue names before calling
+/// out to C code.
+#[derive(Debug, Clone, PartialEq)]
+pub struct Name(CString);
+
+impl Name {
+    pub fn new<S: ToString>(s: S) -> Result<Self, Error> {
+        let string = s.to_string();
+
+        if !string.starts_with('/') {
+            return Err(Error::InvalidQueueName("Queue name must start with '/'"));
+        }
+
+        // The C library has a special error return for this case, so I assume people must actually
+        // have tried just using '/' as a queue name.
+        if string.len() == 1 {
+            return Err(Error::InvalidQueueName(
+                "Queue name must be a slash followed by one or more characters",
+            ));
+        }
+
+        if string.len() > 255 {
+            return Err(Error::InvalidQueueName(
+                "Queue name must not exceed 255 characters",
+            ));
+        }
+
+        if string.matches('/').count() > 1 {
+            return Err(Error::InvalidQueueName(
+                "Queue name can not contain more than one slash",
+            ));
+        }
+
+        // TODO: What error is being thrown away here? Is it possible?
+        Ok(Name(CString::new(string).unwrap()))
+    }
+}
+
+#[derive(Debug, Clone, PartialEq)]
+pub struct Message {
+    pub data: Vec<u8>,
+    pub priority: u32,
+}
+
+/// Represents an open queue descriptor to a POSIX message queue. This carries information
+/// about the queue's limitations (i.e. maximum message size and maximum message count).
+#[derive(Debug)]
+pub struct Queue {
+    name: Name,
+
+    /// Internal file/queue descriptor.
+    queue_descriptor: mqd_t,
+
+    /// Maximum number of pending messages in this queue.
+    max_pending: i64,
+
+    /// Maximum size of this queue.
+    max_size: usize,
+}
+
+impl Queue {
+    /// Creates a new queue and fails if it already exists.
+    /// By default the queue will be read/writable by the current user with no access for other
+    /// users.
+    /// Linux users can change this setting themselves by modifying the queue file in /dev/mqueue.
+    pub fn create(name: Name, max_pending: i64, max_size: i64) -> Result<Queue, Error> {
+        if max_pending > read_i64_from_file(MSG_MAX)? {
+            return Err(Error::MaximumMessageCountExceeded());
+        }
+
+        if max_size > read_i64_from_file(MSGSIZE_MAX)? {
+            return Err(Error::MaximumMessageSizeExceeded());
+        }
+
+        let oflags = {
+            let mut flags = mqueue::MQ_OFlag::empty();
+            // Put queue in r/w mode
+            flags.toggle(mqueue::MQ_OFlag::O_RDWR);
+            // Enable queue creation
+            flags.toggle(mqueue::MQ_OFlag::O_CREAT);
+            // Fail if queue exists already
+            flags.toggle(mqueue::MQ_OFlag::O_EXCL);
+            flags
+        };
+
+        let attr = mqueue::MqAttr::new(0, max_pending, max_size, 0);
+
+        let queue_descriptor = mqueue::mq_open(&name.0, oflags, default_mode(), Some(&attr))?;
+
+        Ok(Queue {
+            name,
+            queue_descriptor,
+            max_pending,
+            max_size: max_size as usize,
+        })
+    }
+
+    /// Opens an existing queue.
+    pub fn open(name: Name) -> Result<Queue, Error> {
+        // No extra flags need to be constructed as the default is to open and fail if the
+        // queue does not exist yet - which is what we want here.
+        let oflags = mqueue::MQ_OFlag::O_RDWR;
+        let queue_descriptor = mqueue::mq_open(&name.0, oflags, default_mode(), None)?;
+
+        let attr = mq_getattr(queue_descriptor)?;
+
+        Ok(Queue {
+            name,
+            queue_descriptor,
+            max_pending: attr.mq_maxmsg,
+            max_size: attr.mq_msgsize as usize,
+        })
+    }
+
+    /// Opens an existing queue or creates a new queue with the OS default settings.
+    pub fn open_or_create(name: Name) -> Result<Queue, Error> {
+        let oflags = {
+            let mut flags = mqueue::MQ_OFlag::empty();
+            // Put queue in r/w mode
+            flags.toggle(mqueue::MQ_OFlag::O_RDWR);
+            // Enable queue creation
+            flags.toggle(mqueue::MQ_OFlag::O_CREAT);
+            flags
+        };
+
+        let default_pending = read_i64_from_file(MSG_DEFAULT)?;
+        let default_size = read_i64_from_file(MSGSIZE_DEFAULT)?;
+        let attr = mqueue::MqAttr::new(0, default_pending, default_size, 0);
+
+        let queue_descriptor = mqueue::mq_open(&name.0, oflags, default_mode(), Some(&attr))?;
+
+        let actual_attr = mq_getattr(queue_descriptor)?;
+
+        Ok(Queue {
+            name,
+            queue_descriptor,
+            max_pending: actual_attr.mq_maxmsg,
+            max_size: actual_attr.mq_msgsize as usize,
+        })
+    }
+
+    /// Delete a message queue from the system. This method will make the queue unavailable for
+    /// other processes after their current queue descriptors have been closed.
+    pub fn delete(self) -> Result<(), Error> {
+        mqueue::mq_unlink(&self.name.0)?;
+        drop(self);
+        Ok(())
+    }
+
+    /// Send a message to the message queue.
+    /// If the queue is full this call will block until a message has been consumed.
+    pub fn send(&self, msg: &Message) -> Result<(), Error> {
+        if msg.data.len() > self.max_size as usize {
+            return Err(Error::MessageSizeExceeded());
+        }
+
+        mqueue::mq_send(self.queue_descriptor, msg.data.as_ref(), msg.priority)
+            .map_err(|e| e.into())
+    }
+
+    /// Receive a message from the message queue.
+    /// If the queue is empty this call will block until a message arrives.
+    pub fn receive(&self) -> Result<Message, Error> {
+        let mut data: Vec<u8> = vec![0; self.max_size as usize];
+        let mut priority: u32 = 0;
+
+        let msg_size = mqueue::mq_receive(self.queue_descriptor, data.as_mut(), &mut priority)?;
+
+        data.truncate(msg_size);
+        Ok(Message { data, priority })
+    }
+
+    pub fn max_pending(&self) -> i64 {
+        self.max_pending
+    }
+
+    pub fn max_size(&self) -> usize {
+        self.max_size
+    }
+}
+
+impl Drop for Queue {
+    fn drop(&mut self) {
+        // Attempt to close the queue descriptor and discard any possible errors.
+        // The only error thrown in the C-code is EINVAL, which would mean that the
+        // descriptor has already been closed.
+        mqueue::mq_close(self.queue_descriptor).ok();
+    }
+}
+
+// Creates the default queue mode (0600).
+fn default_mode() -> stat::Mode {
+    let mut mode = stat::Mode::empty();
+    mode.toggle(stat::Mode::S_IRUSR);
+    mode.toggle(stat::Mode::S_IWUSR);
+    mode
+}
+
+/// This file defines the default number of maximum pending messages in a queue.
+const MSG_DEFAULT: &'static str = "/proc/sys/fs/mqueue/msg_default";
+
+/// This file defines the system maximum number of pending messages in a queue.
+const MSG_MAX: &'static str = "/proc/sys/fs/mqueue/msg_max";
+
+/// This file defines the default maximum size of messages in a queue.
+const MSGSIZE_DEFAULT: &'static str = "/proc/sys/fs/mqueue/msgsize_default";
+
+/// This file defines the system maximum size for messages in a queue.
+const MSGSIZE_MAX: &'static str = "/proc/sys/fs/mqueue/msgsize_max";
+
+/// This method is used in combination with the above constants to find system limits.
+fn read_i64_from_file(name: &str) -> Result<i64, Error> {
+    let mut file = File::open(name.to_string())?;
+    let mut content = String::new();
+    file.read_to_string(&mut content)?;
+    Ok(content.trim().parse()?)
+}
+
+/// The mq_getattr implementation in the nix crate hides the maximum message size and count, which
+/// is very impractical.
+/// To work around it, this method calls the C-function directly.
+fn mq_getattr(mqd: mqd_t) -> Result<libc::mq_attr, Error> {
+    use std::mem;
+    let mut attr = mem::MaybeUninit::<libc::mq_attr>::uninit();
+    let res = unsafe { libc::mq_getattr(mqd, attr.as_mut_ptr()) };
+    nix::errno::Errno::result(res)
+        .map(|_| unsafe { attr.assume_init() })
+        .map_err(|e| e.into())
+}
diff --git a/ops/posix_mq.rs/src/tests.rs b/ops/posix_mq.rs/src/tests.rs
new file mode 100644
index 000000000000..1f4ea9a58da6
--- /dev/null
+++ b/ops/posix_mq.rs/src/tests.rs
@@ -0,0 +1,21 @@
+use super::*;
+
+#[test]
+fn test_open_delete() {
+    // Simple test with default queue settings
+    let name = Name::new("/test-queue").unwrap();
+    let queue = Queue::open_or_create(name).expect("Opening queue failed");
+
+    let message = Message {
+        data: "test-message".as_bytes().to_vec(),
+        priority: 0,
+    };
+
+    queue.send(&message).expect("message sending failed");
+
+    let result = queue.receive().expect("message receiving failed");
+
+    assert_eq!(message, result);
+
+    queue.delete().expect("deleting queue failed");
+}
diff --git a/ops/secrets/.skip-subtree b/ops/secrets/.skip-subtree
new file mode 100644
index 000000000000..80f63816f5ba
--- /dev/null
+++ b/ops/secrets/.skip-subtree
@@ -0,0 +1,2 @@
+The Nix configuration in here is read by agenix and not compatible
+with readTree.
diff --git a/ops/secrets/README.md b/ops/secrets/README.md
new file mode 100644
index 000000000000..e59b86541335
--- /dev/null
+++ b/ops/secrets/README.md
@@ -0,0 +1 @@
+TVL's deployment secrets, encrypted with [agenix](https://github.com/ryantm/agenix/commits/main)
diff --git a/ops/secrets/besadii.age b/ops/secrets/besadii.age
new file mode 100644
index 000000000000..cfbe27b972b4
--- /dev/null
+++ b/ops/secrets/besadii.age
@@ -0,0 +1,19 @@
+age-encryption.org/v1
+-> ssh-ed25519 dcsaLw WLrxQqBE+I1Z5BUcjAK+YfuRFlmmFYu+nwF4Z6eGZWI
+ADFyrki3ojHKjthCQ0MliiwEoCqYFVPFmSDbnbesIFU
+-> ssh-ed25519 zcCuhA j4NiKfnxBQlsthKUNUQMFJsazo9cL5R7RghHaFEGxAw
+lJNgCMjP7+2zDG/hJ++6Q7tBbsdVbzRZIbZZsfIwMSQ
+-> ssh-ed25519 CpJBgQ pVYsbcpywPaHDfnJQcnSZmNGw9Ppv5Un/xunzUG/KBg
+5uFarYtHRrXi6tEYWzbS7ZVsOEn3U0FoURcbx0OHPhU
+-> ssh-ed25519 aXKGcg dz+OWTc3c+odvXbaZR3lOq9t0EFu/t5qfhWOJp/tZxI
+j/z4v0C+Cy+fNuGVMspJfqoOqwkynhQXMK8fPC362PY
+-> ssh-ed25519 OkGqLg UQIzISNwV3+d3CEfeNcImttt+gPOyMuw1rbZ/TIsglo
+cHu007ebLhPE4+ayCjvOcINmG58FYukadAcimcMeTXI
+-> lP{m-grease
+yVvZbJopVdBDfLsbOqhss3DJZNU7ZcSWQP409nTzyy/iV4XwrE85Yj9SsDNRDtTp
+zoPwqQ
+--- O6W1Z0ixSR5N2A7KdPxl5HUKWXDvy/Wcb2fiUzxPK64
+g#lEŋ2~t+CQs1RǠM'	^2PJxsPhU
܂gg3v95$(b57WMpc	Ƨfe*'"],8|7$0qٷ5۳dwƲF^}!"|O|e

+Ձ>D4G~NiLސ@md|*빽၄Ӫa)G2\X3G\d~o{O;LRe]֏^v
+/jHV!UT})[mveX0@;]Z${mF
i<
+Z(SyƨC8AM6ATB˨9ϩ+~:Qo^n.lsJy;peL'LYv&0*0>J$vt
\ No newline at end of file
diff --git a/ops/secrets/buildkite-agent-token.age b/ops/secrets/buildkite-agent-token.age
new file mode 100644
index 000000000000..aef7b142b68e
--- /dev/null
+++ b/ops/secrets/buildkite-agent-token.age
Binary files differdiff --git a/ops/secrets/buildkite-graphql-token.age b/ops/secrets/buildkite-graphql-token.age
new file mode 100644
index 000000000000..e656a6e04dc0
--- /dev/null
+++ b/ops/secrets/buildkite-graphql-token.age
@@ -0,0 +1,16 @@
+age-encryption.org/v1
+-> ssh-ed25519 dcsaLw L31em0JneG6XJikTp2LlYLSMDfsbDWjrNgQPQimIqWk
+3CJid3K/8RsE4cYEeZpqqaTmggMKH12GCDyalQMaK8s
+-> ssh-ed25519 zcCuhA LKq27N4Hx8OQ3eu0TDdBiXO0BcOdSfRZO0YNNG1Y8xE
+PQjl1SErWej6e7jwsddoj06TWQQwp2J/m8zvxR1pRhg
+-> ssh-ed25519 CpJBgQ dRMHEzXCpKPppncOBF4AmOYDZOSxZn+ta0o2H0zyAT0
+qNQFHL0QFxGlm7ZYnJ0H22iyVN3Ya7KYO596j2mN03Y
+-> ssh-ed25519 aXKGcg z31fIwcokphDOcPLNfBZB3ZN9nzG71pMmC68R60nWnU
+3U32x1lxd7brCQj9V8eglSzQ1lCwraxDnjLl68EIR18
+-> ssh-ed25519 OkGqLg 2jyx2iccmCeaXxs7pajP1WkRswZRwxrwVhNUKs1HzxE
+LjScnNDoWArkBXKWtSlJKnIlbnv0892nwn5aRyrF+sA
+-> 8Y8-grease \ObI# /"xHCp uyu Gn&q
+mLNOU8cvH8SB5PCkgKkBmxTb/cgwiQEBUbPI6GmMxvXy/8EMg5K1h3kpKSawW849
+jtLtHeLrM8FLeNtwZyIWpG4
+--- wnNSrutHnL4Trg5hNkuIHPguKl3JYjfEiJVCH4ScnVo
+:-$mY:yOLVLGdQgMbJÄ:O!6O5ɪOZ8*sA
\ No newline at end of file
diff --git a/ops/secrets/buildkite-ssh-private-key.age b/ops/secrets/buildkite-ssh-private-key.age
new file mode 100644
index 000000000000..485c90a9b7df
--- /dev/null
+++ b/ops/secrets/buildkite-ssh-private-key.age
Binary files differdiff --git a/ops/secrets/clbot-ssh.age b/ops/secrets/clbot-ssh.age
new file mode 100644
index 000000000000..a5019e7b87c3
--- /dev/null
+++ b/ops/secrets/clbot-ssh.age
Binary files differdiff --git a/ops/secrets/clbot.age b/ops/secrets/clbot.age
new file mode 100644
index 000000000000..d5d5ae2f08c3
--- /dev/null
+++ b/ops/secrets/clbot.age
@@ -0,0 +1,15 @@
+age-encryption.org/v1
+-> ssh-ed25519 dcsaLw aKWeIQEoQpPT9lPUsV7tK/ySf/0WmFWw7xr7ic4RDFM
+OLRVTC6qVuhNhkYbGQwrxq4sQnqmuQEclKeQ9VPJrOw
+-> ssh-ed25519 zcCuhA j3JAw3UyZHR/x3O7pOTNkytbk5bTGnfBtsM030NolQk
+nt+9a3tJkO7j2nGI9C6S5YlYWYOCMqNOETU77PI4b10
+-> ssh-ed25519 CpJBgQ ScLyIj1cdn0wAwgaOSVGsusx/y3PD5/rDy7+OvjGIiU
+5tYuoEfVn0i1RtZ5XP+1HgyTSWkkRN4m36u6Fj3PkC4
+-> ssh-ed25519 aXKGcg 9p2LQFtV1X7jzG7n//GRUGmHGAsbGSCz6Q6SyBOZWwY
+wdOPCOHYkplGEoUOOTs99Kgde15xuJq8uzkZxudUo24
+-> ssh-ed25519 OkGqLg oLEc1KdRriCWobe5DF9OKVwDqQaW9RyjWDft1h5M4x8
+i/UEbhITzk3IOYme/xKuTfdbNMFNhLgRHbiiCAgKFBI
+-> %-grease 0 \^g*
+8aTar8xKZk24swVi7NVE0UN19BrexqAGcMWOeovRmQ
+--- N/kNOLE5d+yk7fAPRZmj8E1qMggLha56uKb9oj0/uHQ
+- >I1f9NF	wKlx055OZz~ys!gQtՇl1Wf9\sΰp.n
\ No newline at end of file
diff --git a/ops/secrets/default.nix b/ops/secrets/default.nix
new file mode 100644
index 000000000000..43f2a738bb6b
--- /dev/null
+++ b/ops/secrets/default.nix
@@ -0,0 +1,3 @@
+args:
+let mkSecrets = import ./mkSecrets.nix args; in
+mkSecrets ./. (import ./secrets.nix) // { inherit mkSecrets; }
diff --git a/ops/secrets/gerrit-queue.age b/ops/secrets/gerrit-queue.age
new file mode 100644
index 000000000000..eb9828847cbe
--- /dev/null
+++ b/ops/secrets/gerrit-queue.age
@@ -0,0 +1,17 @@
+age-encryption.org/v1
+-> ssh-ed25519 dcsaLw qywg/yigMgYkhxORSqfuVsggQUMmQSPp6T9BjlEogGk
++vVPOuG9MqK/K5lkn/dTjd2RLJYL9F3uYnsK3I2r6nk
+-> ssh-ed25519 zcCuhA w1iPgVkUx3U/r64ooH4UhUMnrHC+Kqs5oooDIL+pbyA
+zUDp/32Hj3pEEXeL/8BJ0J5qQLqCOjpzbmQdsXGA9qk
+-> ssh-ed25519 CpJBgQ kRl0KlOJtcHsnNyJfyWlm9cW6ZQMrzmhgKaT+zYr03A
+lTprX0AfgP68w5towNfJw/YO3LoZFZYm0Y26Lb2La50
+-> ssh-ed25519 aXKGcg 4T+HCfrAPXDQORxNFm3lR9qJBfd4WcCQ/ny7bBs4mT8
+zKu2W42LJl6jUS6vYFJj30x+SaQQarx7OALCJ7fUTac
+-> ssh-ed25519 OkGqLg EEpq+VV3LC55VErd92bKnj7KqEzQqS6S60EZuCgb5Co
+XiyO6rELbfgj+2S3SQDu4Csz0Bw1NIGos69ixDPIEMU
+-> GY`K*hZ-grease VW)6 t.El^< @P
+dS5BLWUWe5RDzdf4uWzEOwW7lLrWtD8hqISTSWzFOFGnQgWX6cqZhtUlCmciRlCq
+RLXx5Nu3sSIEBX6FZR30PjmjyDQ7qArxc/Up0pkJ+ntG1d2lobyeB3qXsn8femUU
+Ku76
+--- 7KKYqquKMip1Qht63i2YH/9lGTv+MMso2YtIzF+6eis
+b>w~IRjW=ͳ?1:ZMJgJ2*nzEּwgq[3.^8i%!#|ub2darn=/TI-MTE¸˕N'0\Kd~-kɜf)
\ No newline at end of file
diff --git a/ops/secrets/gerrit-secrets.age b/ops/secrets/gerrit-secrets.age
new file mode 100644
index 000000000000..9869b0d46ab7
--- /dev/null
+++ b/ops/secrets/gerrit-secrets.age
@@ -0,0 +1,15 @@
+age-encryption.org/v1
+-> ssh-ed25519 dcsaLw UCZDSCgRCFAE07NoKG/fuyEE1k4wmNE0Dlg4APH/Exk
+VEnLQHoxfRgBqu3A0FTQ5KMo3w2pPSzr/dG0jT06xq0
+-> ssh-ed25519 zcCuhA fdZUx8wTyxVYd7DCngcLKligArm5mlYGTqCUKYsSflI
+hO8Hx6qJ3GRZipYDWseJmbGJEQ/FyU0/eMqsO9Sc9DM
+-> ssh-ed25519 CpJBgQ NCz9xhb6O5+XQxQSGTdJanwj68kg/mnhRm35/4L3+Sc
+kxZ6+NOd5b2VK/VjPKpbRNTmCW8wdNZV5IgY5OT2zEk
+-> ssh-ed25519 aXKGcg ZCfSQV7NUBsDLgb5sk0wRG3Zvhb8St98odNS7TmPu0c
+b3AqqM9bcNPI8G+in9a/ZPg0CiqXOYNMXMTrR42xr0k
+-> ssh-ed25519 OkGqLg SgctN3C54OmcYTCSrN0pA4+E7D1ry3byKebqV7Tjbg4
+Yk/2xD6lD69vhZH4+GQZh07hOOcOc0AKRq2zmkCrrjk
+-> ax~swz;-grease
++jjWRJAR+9n7HqxifiYbIvk2tFX9H/1H9O329yzf
+--- oZTj6wdxzeIDNWtZxBB5zo2DM4W1OcWPsTMqWJqYLSk
+ri-CT	}29K|CTQ$Im#xdň3>Dd{FSmaçZuaOeu:rϦ
d</,-Su?)Jo#RMv*xYMß[l℟Փaй?rrgrOi,ca$m3QEx(Dܯ{8|`2
\ No newline at end of file
diff --git a/ops/secrets/grafana.age b/ops/secrets/grafana.age
new file mode 100644
index 000000000000..d6022b4ea541
--- /dev/null
+++ b/ops/secrets/grafana.age
@@ -0,0 +1,17 @@
+age-encryption.org/v1
+-> ssh-ed25519 dcsaLw FAneL6Ra+ipVGA37rsEOIbObsDK5L93n1tk6vsDiq08
+HcEABCYv388oK0Fk3zcCXdnpi+arLHvYWjqS+vMwlWg
+-> ssh-ed25519 zcCuhA n0FaAavgxFkJ1Lbd7bdDihV3m0aQ6IrD30G4N0NsNXU
+YumH3OYrbM/r/vgTFzJ8vEEWd7I/2yYdk6uBF4FLzG0
+-> ssh-ed25519 CpJBgQ +80Q06PTyeX+lnPZf1o5v4jBDoSfuIudOD49c72i5gc
+gNXrdBhVicCa0j7uGmvFrbZFMgN+4NQ5wxyojQUI8JE
+-> ssh-ed25519 aXKGcg cB4hgrcG47MEbgdvRQdJLBgQtGpyAw7rZTHQnE8mF2U
+vF46NzfPXjodk081WEd9D8LHMwB33Emswx65k2xiiQw
+-> ssh-ed25519 OkGqLg H4abrPcW2U+0h9ChEANdCoaYgIXW/2GMOfaPXc142lk
+OYQyK4tSDsyRIbqLhXxWc6ZgnS4/9YS8FD/M3N8ctG8
+-> 2UpS,n-grease 2@ A F$+@#Lk\ C4|Pa
+WKOTNBDihEkbp8U9elitxCVbpwa+RUXIUkWDKDdcLalK7no6DtfJVMyPAyPPymWg
+QOXPnkx1mw16wzj6elS86QU
+--- vEbbqmuObg1gVHyfCb+6CN3bkeNyyWam3r7uG5KiHec
+m26NR69.l@(_ώYUMD'Nq%y%(2yJ% Co	)m
+
\ No newline at end of file
diff --git a/ops/secrets/irccat.age b/ops/secrets/irccat.age
new file mode 100644
index 000000000000..b70abf636cad
--- /dev/null
+++ b/ops/secrets/irccat.age
@@ -0,0 +1,16 @@
+age-encryption.org/v1
+-> ssh-ed25519 dcsaLw fiDNJcoEINRGGnkyaUN9j2bkXfFszU6Auje59dkfDRY
+vbwn4fQP8PQ5ZFLLah4kgxcV5MN4Zbr6ncjJYtZx6mw
+-> ssh-ed25519 zcCuhA GwygU+Rh3BADW/+WVL5QBb/LGEQ46HtZRWi8Ez5gdGI
+qwV4L6q9LZ5UondrZ8lZiFCqyVyNj41v15yzb/9Ha0o
+-> ssh-ed25519 CpJBgQ pBgC0bUHKNiB+NqHA7G2mJtTsWohDlDEVYZzZg1S3hA
+Zr8h2M1lz+kENM/H6fiWr6zsz1pRCE+0FcS+8epFIDM
+-> ssh-ed25519 aXKGcg Kuz7+ZHdExz4sbeOVK7MOjtldakqpuiUoCXa5BzBrlM
+lhOZVOKxSjZi/GUu2zDM5HTrbKTcxyk92JZHccJlAig
+-> ssh-ed25519 OkGqLg NJg2CK0q37agzqgqsLTlSIm8rhfaPwEIEPm+7eBp2So
+kB4p46ar71gLlbRBC1VdnHtGsA7oM8hBOqEo4X8ixNA
+-> VSn<1?+[-grease N=4\Egxn P:d\gl Ye-lT|k0
+v4W8MII8drZm1Eryx4Wzasc9WjargNyCe4R5Q+umIsuUNZebjQpvcmg1SlasTfi/
+oAdY1SZLaOJH0LmkP2v9ztz0MDsvOx9y5NZd/qw/NswgrI9FJmVh
+--- m4VHPIp1FsrSWHAdKwliymn9kdmFFrfo2SncDua+MEY
+{-`2k|K$>TzF6<K|cm5B)Ob5V@{03WE&<E Dj
\ No newline at end of file
diff --git a/ops/secrets/journaldriver.age b/ops/secrets/journaldriver.age
new file mode 100644
index 000000000000..823b5278809a
--- /dev/null
+++ b/ops/secrets/journaldriver.age
Binary files differdiff --git a/ops/secrets/keycloak-db.age b/ops/secrets/keycloak-db.age
new file mode 100644
index 000000000000..185f79da8b75
--- /dev/null
+++ b/ops/secrets/keycloak-db.age
@@ -0,0 +1,15 @@
+age-encryption.org/v1
+-> ssh-ed25519 dcsaLw rG0ThGyx3bkL/WOz1K1iP3CmrKORLjsUrLNJbtb1WB0
+xbkyt7EUb1BhBKUYt3hh93kEU1avcqlCLKfHc3x+BEU
+-> ssh-ed25519 zcCuhA mwSN0urAXmA4vPCWIkzvCuDoE/LcA3eWpXr24Qab/lY
+Esa4Rfn55KYpIdYxsxGhBpPs40o28PJHbn8AEDn1n78
+-> ssh-ed25519 CpJBgQ ODm3P+PymrXBxEejSDi2YUTEadBVzJiIt6vYHpzH1C4
+nC9FY8yilVG65HXmRTtpvjKj2awE9SI1qp8duskNP7M
+-> ssh-ed25519 aXKGcg cdO7r0WCOktOmldIqvjVogyCximfA9sWd2Vq+bBgF2U
+1INC04f5PDwQgSQVeDpJomL5iZmyQfTwzHVu7BG+UUw
+-> ssh-ed25519 OkGqLg D6x2fkkNeoZToQrOhNVh69Y3kWN5NqZzXkUc2556nBY
+ZC4asUqTT6ZnQdnYV9Xn0yqTgLFt14Vo+3RncxWingU
+-> R^R|CZso-grease xq76HV<!
+MQSwHZCAIj24PlpplrTWjrZPAe5I31NC3xnWU80Q7Gk7FHUavAw
+--- NG3cBfD3zeP6McHAXxhPuWZVrC9au95/+r6fMi01Gjs
+`$|mR_!z[|伭2s"h0ž*0(-&
\ No newline at end of file
diff --git a/ops/secrets/mkSecrets.nix b/ops/secrets/mkSecrets.nix
new file mode 100644
index 000000000000..c99130835f15
--- /dev/null
+++ b/ops/secrets/mkSecrets.nix
@@ -0,0 +1,27 @@
+# Expose secrets as part of the tree, making it possible to validate
+# their paths at eval time.
+#
+# Note that encrypted secrets end up in the Nix store, but this is
+# fine since they're publicly available anyways.
+{ depot, lib, ... }:
+
+let
+  inherit (depot.nix.yants)
+    attrs
+    any
+    defun
+    list
+    path
+    restrict
+    string
+    struct
+    ;
+  ssh-pubkey = restrict "SSH pubkey" (lib.hasPrefix "ssh-") string;
+  agenixSecret = struct "agenixSecret" { publicKeys = list ssh-pubkey; };
+in
+
+defun [ path (attrs agenixSecret) (attrs any) ]
+  (path: secrets:
+  depot.nix.readTree.drvTargets
+    # Import each secret into the Nix store
+    (builtins.mapAttrs (name: _: "${path}/${name}") secrets))
diff --git a/ops/secrets/nix-cache-priv.age b/ops/secrets/nix-cache-priv.age
new file mode 100644
index 000000000000..cc8513071ad9
--- /dev/null
+++ b/ops/secrets/nix-cache-priv.age
Binary files differdiff --git a/ops/secrets/nix-cache-pub.age b/ops/secrets/nix-cache-pub.age
new file mode 100644
index 000000000000..f628f2bbe4fd
--- /dev/null
+++ b/ops/secrets/nix-cache-pub.age
@@ -0,0 +1,16 @@
+age-encryption.org/v1
+-> ssh-ed25519 dcsaLw j+RSQPvmBUL+/tJpoZqbMyh//yPYelDkS8rGMBDeYBg
+w9XLo36I+Fh8yCgL9aL1V2dHA5PFIhA/mi+inpA0vO0
+-> ssh-ed25519 zcCuhA KTfCgCjc38/NRthB4ttrQV7aXbBgvs0Bgxitspo1TTo
+Zj7ZcjNxdiXgasq0pACRL6E3PvRsjsYsZeHFbX1mNYY
+-> ssh-ed25519 CpJBgQ 4nH14KX8d5AYlQOYpAq77Oz6QLLcqh+We7WT0yXx3EA
+YCIc6wFk++uaankNET+SATIRMPXh1C2NemJssGUexXA
+-> ssh-ed25519 aXKGcg x2izNmR+I9+2sRoHye4YUXU/6EZA8ZicIKUbjARVR28
+AV28t/cAwP6Js4lfYedJ88dCyAuKLq7RJU9SlhBx1FA
+-> ssh-ed25519 OkGqLg PpKqeVlQ015Qv2zvvrR8kTj+7kDHirLz4Zk8f32NoTA
+huaUh3Q3uJmsi9yWyuJgnEhgmsVjspfpR+IN6uT8FgA
+-> R2aR1C?^-grease
+7rumeWTufR7m6GRBOwKKVfzmMG8QRHzmt103vQfgmylhzGa2r6z2L3qSfFTqCW7T
+gMdbpgVvvTO+5aROt+iieBz9KFkHD3l/NXAhyZf8ydWRQlmDXcomY7QmSC3jLAE
+--- RX4Cux3g3rn4jdCZMpP8XenZ45uol6W4+wBk8jofI0E
+=[ބ$֘Klmdhe&*ERtΟD:;-=;W$0
\ No newline at end of file
diff --git a/ops/secrets/oauth2_proxy.age b/ops/secrets/oauth2_proxy.age
new file mode 100644
index 000000000000..816944684a37
--- /dev/null
+++ b/ops/secrets/oauth2_proxy.age
@@ -0,0 +1,16 @@
+age-encryption.org/v1
+-> ssh-ed25519 dcsaLw pkxciQfQ/yrexMq/Djpq1KNLFYBRTnJSi3fo4iQ0MDk
+FAlEvIgT+h/7Lcj5E0BeEbaWlZAg1THoiqsQg6Sy1oI
+-> ssh-ed25519 zcCuhA sey8T2EXLHh5TF726U0DSn+MfXYYjimQxdsE67iflTc
+lPWYa9jrmwkac8KkCUypfZ5D3GCZwtdQPaXQRiM5xMo
+-> ssh-ed25519 CpJBgQ 6EzBbhxLD1Cjy1LRWnfum+tFvPRzxMoPT6P2HDN7qBs
+BPWNJiFIrAPdcOOK0um+RzclUGgrS7yJwCjx8X0pYTk
+-> ssh-ed25519 aXKGcg kMVeXntSlq3E5hbuNtu7e+iKoJpQDRR4isbx/WCYc0g
+fWvCPlcnjunuQ2LB02eQ51gr6SK2leaNuHttQOjJOyw
+-> ssh-ed25519 OkGqLg QFU47rj1sU5JuQtehbxyymEOpZYl0bWY6dRo81KrQxE
+5TXNy6e2sM5b+K5lSXEkLdJ8F4ZDJfYEetJ7/jsxAIY
+-> `!"O*HV-grease 1YD XwG${5; #Pr \7G
+CD72odW0Q4DMW6SGY+cUpBPhFePtjebkf1rpZJz0Twl8YrzbrXQfIgWv+tCUbr2d
+PKZKtlc9u0F+B6BKfVpZn0s0PD4/XGQ1PNLL/ZajxvYSB/w+UWbE67s
+--- U0nGetyOZONCTw7TQJ5QNUScp6v2noSVkrWCMJeROH8
+zsͮ~=H'Q|dL_Bx0;7Cg
*B3kp8{P+a%ؽ)EmF'`AUvUDzcLWox7PT(	n~a
\ No newline at end of file
diff --git a/ops/secrets/owothia.age b/ops/secrets/owothia.age
new file mode 100644
index 000000000000..c3ad07d2324c
--- /dev/null
+++ b/ops/secrets/owothia.age
Binary files differdiff --git a/ops/secrets/panettone.age b/ops/secrets/panettone.age
new file mode 100644
index 000000000000..542c866d61c6
--- /dev/null
+++ b/ops/secrets/panettone.age
@@ -0,0 +1,17 @@
+age-encryption.org/v1
+-> ssh-ed25519 dcsaLw 0vXqVyiNwKAvIjBi1PPPWYzapFFuwFAGQqohfdaaThc
+cp+oevy9hbMvviVNTxKpws1Fsyirxr/nKZltlA08cWI
+-> ssh-ed25519 zcCuhA bFhpOsXo7H8GF3xLFwLs84aJegWj50+pEQDbyYYpwE0
+Y5iRW6/dhBNUHgNmObUEJu991Ms0RU1Y7xkeoz16A0U
+-> ssh-ed25519 CpJBgQ 5y0eXpmerwxRtySanRSBQeHCkMt96BOLVgR8S2lDSH4
++Z+3b9d8B5HZRVOL76SCNPIh9nhXKPSWq4lj0X2k2eg
+-> ssh-ed25519 aXKGcg HK5KeRoc+fhbYQ9RZTnum5x2y+vvyEQNKRpnNOISFn0
+TxZplwFO2e1YgY/V9tkLSVGxh9407xsxsT09N3jfcv4
+-> ssh-ed25519 OkGqLg otifGzPJ9Ykwdx9AkwlFW9AHAQL5OXnDexp8N4lJ6ys
+dFVgPNi8p3wQYbVbokxGqiNKUd3POXBs49LO3FAR6Js
+-> e"s'-grease :{S#]YZ MyRj r['U^ 0
++qc7
+--- Gnh5iyD6drHbPt2bE9JCGlXcPAPDPhkJl8A9+5SHNz4
+!u
+9wIV~Ep| *aGc3ZƩSQҾ\)f[)7gޘסPYEE5W$igLLCF=N
t
+b7ŏyFx;d9н+<r(U^P1W/%w#cWKk|)MrrYzL2/!]:Drya̳G
\ No newline at end of file
diff --git a/ops/secrets/secrets.nix b/ops/secrets/secrets.nix
new file mode 100644
index 000000000000..0d45f3b02524
--- /dev/null
+++ b/ops/secrets/secrets.nix
@@ -0,0 +1,46 @@
+let
+  tazjin = [
+    # tverskoy
+    "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIM1fGWz/gsq+ZeZXjvUrV+pBlanw1c3zJ9kLTax9FWQy"
+
+    # zamalek
+    "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIDBRXeb8EuecLHP0bW4zuebXp4KRnXgJTZfeVWXQ1n1R"
+  ];
+
+  grfn = [
+    "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIMcBGBoWd5pPIIQQP52rcFOQN3wAY0J/+K2fuU6SffjA "
+  ];
+
+  sterni = [
+    "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIJk+KvgvI2oJTppMASNUfMcMkA2G5ZNt+HnWDzaXKLlo"
+  ];
+
+  sanduny = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIOag0XhylaTVhmT6HB8EN2Fv5Ymrc4ZfypOXONUkykTX";
+  whitby = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAILNh/w4BSKov0jdz3gKBc98tpoLta5bb87fQXWBhAl2I";
+
+  whitbyDefault.publicKeys = tazjin ++ grfn ++ sterni ++ [ whitby ];
+  allDefault.publicKeys = tazjin ++ grfn ++ sterni ++ [ sanduny whitby ];
+in
+{
+  "besadii.age" = whitbyDefault;
+  "buildkite-agent-token.age" = whitbyDefault;
+  "buildkite-ssh-private-key.age" = whitbyDefault;
+  "buildkite-graphql-token.age" = whitbyDefault;
+  "clbot-ssh.age" = whitbyDefault;
+  "clbot.age" = whitbyDefault;
+  "gerrit-queue.age" = whitbyDefault;
+  "gerrit-secrets.age" = whitbyDefault;
+  "grafana.age" = whitbyDefault;
+  "irccat.age" = whitbyDefault;
+  "journaldriver.age" = allDefault;
+  "keycloak-db.age" = whitbyDefault;
+  "nix-cache-priv.age" = whitbyDefault;
+  "nix-cache-pub.age" = whitbyDefault;
+  "oauth2_proxy.age" = whitbyDefault;
+  "owothia.age" = whitbyDefault;
+  "panettone.age" = whitbyDefault;
+  "smtprelay.age" = whitbyDefault;
+  "tf-glesys.age" = whitbyDefault;
+  "tf-keycloak.age" = whitbyDefault;
+  "tvl-alerts-bot-telegram-token.age" = whitbyDefault;
+}
diff --git a/ops/secrets/smtprelay.age b/ops/secrets/smtprelay.age
new file mode 100644
index 000000000000..3904107261d9
--- /dev/null
+++ b/ops/secrets/smtprelay.age
@@ -0,0 +1,16 @@
+age-encryption.org/v1
+-> ssh-ed25519 dcsaLw mqDmOqzDl7BY8xj7TuCHcIGrkiqURHK4Y4NkmUesyQE
+sfNvq6kuQUWuza3B6feUQtcWYhYh/aiN89fTOHdhHSY
+-> ssh-ed25519 zcCuhA rBlPiVmj7dSYHljc4/fhL7a9GSeCp/8FqG1R2f1kPgw
+o6Za8zm3n2LBnj9jQAU7Xtvt5ULIUesdiTi11DeRMY8
+-> ssh-ed25519 CpJBgQ vM3qI0XMQJY/ExxE3a0mmHhc5hY9rPDBzdJ4v9oZBlY
+lLHtL9j8ltx86eWwlPkyblcWjRd2iMjimwMXZptsRAc
+-> ssh-ed25519 aXKGcg +6heNooQufYnntQ1PJHlW/8aG4vijzY/CfXHUGPKMQE
+T95bxZSRC9Cdx9ZTaTnHWdeq0wKOkRL9mQxNo8j9SfA
+-> ssh-ed25519 OkGqLg HvpZmHz0DZIqWHiXvUsJ/OILlRhptl4WMDDiVF6dxko
+FoTSc84FRFnBh0rOYFX3M7t9p/hvn4DZMHZfU9jy0zo
+-> $<0F{v-grease
+blva6tBLrd967p8hOMGy0JT6Y19zWNdgowASEEBpoFzsmNlyKdbaYyMbxKTuqmCy
+8Wy5TpBj99pcUsEB
+--- DTMNC/wQr8xtJKIPPKjx90PmAZ15eimydKbYGnEa7Jc
+֐Զ"RA!]*	)
2)7ꗞ3AjӤʏL5EN"1:4tp.܋jpqG2(\mqߑF@1aŌ%
\ No newline at end of file
diff --git a/ops/secrets/tf-glesys.age b/ops/secrets/tf-glesys.age
new file mode 100644
index 000000000000..caeac0b1ee1e
--- /dev/null
+++ b/ops/secrets/tf-glesys.age
Binary files differdiff --git a/ops/secrets/tf-keycloak.age b/ops/secrets/tf-keycloak.age
new file mode 100644
index 000000000000..b450e84fb069
--- /dev/null
+++ b/ops/secrets/tf-keycloak.age
Binary files differdiff --git a/ops/secrets/tvl-alerts-bot-telegram-token.age b/ops/secrets/tvl-alerts-bot-telegram-token.age
new file mode 100644
index 000000000000..d9562ce924ab
--- /dev/null
+++ b/ops/secrets/tvl-alerts-bot-telegram-token.age
@@ -0,0 +1,16 @@
+age-encryption.org/v1
+-> ssh-ed25519 dcsaLw 14nPZssvAKQSzPdL+1iyz0BVA1DOdFDafdCyRfcmSWo
++ENcKRKyUN3G9+kd/Y9IpQbO3rIZdYiznqGO1cfVNZE
+-> ssh-ed25519 zcCuhA i/ag/HD84XrTpYigStOfwnWBLjOSypCnVuIYjtdVc2o
+T+dN0nl3H6J6OaMyLNHLgy99H8YJtSjgintxogJkWjo
+-> ssh-ed25519 CpJBgQ bbyerpmjpTkMmSaLnV5OuMQzqqtGao4eqE4kiFzm+Dw
+0Hskm4/Cks4Eu/Jr4Eh6302jWo64rdInvvJH6XJFyBk
+-> ssh-ed25519 aXKGcg sqdfN/2YLFmdhEWgn5Z/OAsmXwMORX/dPrmD4O7MlCE
+h/ej9LjZHn04rkEbvIaGAcLT3dMs9RdL3vFA+Rgdp3g
+-> ssh-ed25519 OkGqLg fK2cPxfOupCIfC1giMj2CFg/K/+4XX+fLpkqUmQHzDY
+uXTHT30ytEvliNAvmwlPyaySsYDVLarZgouV9Tfo6qo
+-> Me?Ykt-grease 4S m!3LR ^/)u#tFR
+1A
+--- UP4D68fCAMJC+1T1zbIiGCah3Ph+pJf7Z6wv2YJaOCQ
+js]U-Jγ6Y#^
+$$L1pwa:qwgq3Ԓb0zH%f!.0ΐ'֘!
\ No newline at end of file
diff --git a/ops/users/default.nix b/ops/users/default.nix
new file mode 100644
index 000000000000..9ade43449739
--- /dev/null
+++ b/ops/users/default.nix
@@ -0,0 +1,167 @@
+{ ... }:
+
+[
+  {
+    username = "adisbladis";
+    email = "adisbladis@gmail.com";
+    password = "{ARGON2}$argon2id$v=19$m=65536,t=2,p=1$wdgoLRrUgZuz0Kin9YiNgQ$E40VIgzgpMpylZqkfByTKiWQnerupfuf7LDgOsU8tJA";
+  }
+  {
+    username = "andi";
+    email = "andi@notmuch.email";
+    password = "{ARGON2}$argon2id$v=19$m=65536,t=2,p=1$8lefg7+8UPAEh9Ott8zH0A$7YuLRraTC1IgxTNTxFJF03AWmqBS3GX2+vfD4XVTrb0";
+  }
+  {
+    username = "cschilling";
+    email = "christian.schilling.de@gmail.com";
+    password = "{ARGON2}$argon2id$v=19$m=65536,t=2,p=1$9VN3IS6ViW5FFbVKWOZI6Q$gZxuYAYk0Opq4E5i8cbcNjfznCQNc+RiP7Xv1CUnrQU";
+  }
+  {
+    username = "cynthia";
+    email = "me@cynthia.re";
+    password = "{ARGON2}$argon2id$v=19$m=65536,t=4,p=1$TxjbMGenhEmkyYLrg5uGhbr60THB86YeRZg5bPdiTJo$k9gbRlAPjmxwdUwzbavvsAVkckgQZ0jS2oTtvZBPysk";
+  }
+  {
+    username = "edef";
+    email = "edef@edef.eu";
+    password = "{ARGON2}$argon2id$v=19$m=65536,t=2,p=1$OORx4ERbkgvTmuYCJA8cIw$i5qaBzHkRVw7Tl+wZsTFTDqJwF0vuZqhW3VpknMYMc0";
+  }
+  {
+    username = "ericvolp12";
+    email = "ericvolp12@gmail.com";
+    password = "{SSHA}pSepaQ+/5KBLfJtRR5rfxGU8goAsXgvk";
+  }
+  {
+    username = "eta";
+    email = "tvl@eta.st";
+    password = "{SSHA}sOR5xzi7Lfv376XGQA8Hf6jyhTvo0XYc";
+  }
+  {
+    username = "etu";
+    email = "etu@failar.nu";
+    password = "{ARGON2}$argon2id$v=19$m=65536,t=2,p=1$RUrW8C9mWAkBSlkwSTH5dw$n3FXTeu41nDQfvJPI7TT3tcgwPmPJl8hPtaZ58qLq9A";
+  }
+  {
+    username = "firefly";
+    email = "firefly@firefly.nu";
+    password = "{ARGON2}$argon2id$v=19$m=65536,t=2,p=1$RYVVkFoi3A1yYkI8J2zUwg$GUERvgHvU8SGjQmilDJGZu50hYRAHw+ejtuL+Skygs8";
+  }
+  {
+    username = "flokli";
+    email = "flokli@flokli.de";
+    password = "{ARGON2}$argon2id$v=19$m=65536,t=2,p=1$TrezbwIY5TKLnJiii0wafQ$K0S2p9I8tiqP907nkgoK6IbG9ia4IuDiylTcIs5pesw";
+  }
+  {
+    username = "grfn";
+    email = "grfn@gws.fyi";
+    password = "{ARGON2}$argon2id$v=19$m=65536,t=2,p=1$5NEYPJ19nDITK5sGr4bzhQ$Xzpzth6y4w+HGvioHiYgzqFiwMDx0B7HAh+PVbkRuuk";
+  }
+  {
+    username = "htbf";
+    email = "h-tvl@htbf.dev";
+    password = "{ARGON2}$argon2id$v=19$m=65536,t=2,p=1$2iVXQQfd26icaIguHJg/CQ$hA9ziqn7kQ06AV6uQxJCGXoG8f+LWmH+nVlk00a1n/c";
+  }
+  {
+    username = "isomer";
+    email = "isomer@tvl.fyi";
+    password = "{SSHA}OhWQkPJgH1rRJqYIaMUbbKC4iLEzvCev";
+  }
+  {
+    username = "j4m3s";
+    email = "james.landrein@gmail.com";
+    password = "{ARGON2}$argon2id$v=19$m=65536,t=2,p=1$dMYmo+Uym9irtzAGXB2eNw$69OFcuqCqoLPBXKmmtYaQCquXximpyxsb2Kf8U7GdxM";
+  }
+  {
+    username = "kn";
+    email = "klemens@posteo.de";
+    password = "{ARGON2}$argon2id$v=19$m=65536,t=2,p=1$CoRZInysud4sduDoMjVOCw$/bdvAvyPO2DPxOcHlBiG2+rbTGF9XAcHUhPurxiIpZM";
+  }
+  {
+    username = "lukegb";
+    email = "lukegb@tvl.fyi";
+    password = "{SSHA}7a85VNhpFElFw+N5xcjgGmt4HnBsaGp4";
+  }
+  {
+    username = "nyanotech";
+    email = "nyanotechnology@gmail.com";
+    password = "{SSHA}NIJ2RCRb1+Q4Bs63cyE91VZyiN47DG6y";
+  }
+  {
+    username = "Profpatsch";
+    email = "mail@profpatsch.de";
+    password = "{SSHA}jcFXxRplMFxH4gpa0X5VdUzW64T95TwQ";
+  }
+  {
+    username = "sterni";
+    email = "sternenseemann@systemli.org";
+    password = "{ARGON2}$argon2id$v=19$m=65536,t=2,p=1$+NbF1izPMGqN5bASCBDV9g$aqBVplHwiyDpflZUmLtjkLWzKhxi7hwjm5fOwfbKohU";
+  }
+  {
+    username = "qyliss";
+    displayName = "Alyssa Ross";
+    email = "hi@alyssa.is";
+    password = "{ARGON2}$argon2id$v=19$m=65536,t=2,p=1$+uTpAKrN452D8wa7OFqPnw$GYi9/zns5iJCXDp1VuTPPsa35M5vkD6+rC8riT8cEHI";
+  }
+  {
+    username = "riking";
+    displayName = "kanepyork";
+    email = "rikingcoding@gmail.com";
+    password = "{ARGON2}$argon2id$v=19$m=65536,t=2,p=1$o2OcfhfKOry+UrcmODyQCw$qloaQgoIRDESwaA3yqPxxy8sgLk3mrjYFBbF41elVrM";
+  }
+  {
+    username = "tazjin";
+    email = "tazjin@tvl.su";
+    password = "{ARGON2}$argon2id$v=19$m=65536,t=2,p=1$wOPEl9D3kSke//oLtbvqrg$j0npwwXgaXQ/emefKUwL59tH8hdmtzbgH2rQzWSmE2Y";
+  }
+  {
+    username = "implr";
+    email = "implr@hackerspace.pl";
+    password = "{ARGON2}$argon2id$v=19$m=65536,t=2,p=1$SHRFps5sVgyUXYdmqGPw9g$tEx9DwKK1RjWlw52GLwOZ/iHep+QJboaZE83f1pXSwQ";
+  }
+  {
+    username = "ben";
+    email = "tvl@benjojo.co.uk";
+    password = "{SSHA}Zi48mSPsRMEPhff44w4RHi0SjjyhjWk1";
+  }
+  {
+    username = "jamie";
+    email = "jamie@kwiius.com";
+    password = "{ARGON2}$argon2id$v=19$m=65536,t=2,p=1$OkAMHVAfQ3nJhBffYJwk7Q$JV3DrF9eOU+4VL6I+nkaMUUOMqWuNzdp7N7U5Xwa3fg";
+  }
+  {
+    username = "milan";
+    email = "milan@petabyte.dev";
+    password = "{ARGON2}$argon2id$v=19$m=65536,t=2,p=1$VQAHgOqYVr7mzjEr8IAMdQ$eAXvy58eRkjg+96RKBCwUoRDpNyGDdes4rVtxoQbaeI";
+  }
+  {
+    username = "ezemtsov";
+    email = "eugene.zemtsov@gmail.com";
+    password = "{ARGON2}$argon2id$v=19$m=65536,t=2,p=1$eAEjTm0+JD0+p0o/GA8JmQ$uRtHCT+B/DBNr1rlOcLlROrkYsMj2T9ns/E9Ep3gJ1A";
+  }
+  {
+    username = "mdjnsn";
+    email = "mdj@mikejohnson.xyz";
+    displayName = "Mike Johnson";
+    password = "{ARGON2}$argon2id$v=19$m=65536,t=2,p=1$77+f5DFbuzs5myyIUN2nHg$xyXkRhIHFVaPMZUhxPk1uxMpLeEmU3BeyQjDsNPlJVw";
+  }
+  {
+    username = "smitop";
+    email = "me@smitop.com";
+    password = "{ARGON2}$argon2id$v=19$m=65536,t=2,p=1$H78rQtmhlzrPEifbXPoCVw$IBg7ePTm/u+e8r2A8aJ4iaaQBzMUw1isS9YJAZ8aT3o";
+  }
+  {
+    username = "asmundo";
+    email = "asmundo@gmail.com";
+    password = "{ARGON2}$argon2id$v=19$m=65536,t=2,p=1$oQvNAAGjshz5Cl8XW5i31A$eurlL9a7e5Ttw5JpTY9tOjSZyivWQsr1iCdTqshdfQU";
+  }
+  {
+    username = "wpcarro";
+    email = "wpcarro@gmail.com";
+    password = "{ARGON2}$argon2id$v=19$m=65536,t=2,p=1$NQdBVPNwh2ioDq9zWfMusA$2cABJGI8cU2JZirnVU5E5C28sTiePkiOPEAaqNUp/Fk";
+  }
+  {
+    username = "zseri";
+    email = "zseri.devel@ytrizja.de";
+    password = "{ARGON2}$argon2id$v=19$m=65536,t=2,p=1$wVNkImXloXIkCycnecdFeA$ECAdGdNzUUEq9sFGsIl0jb7AALGsHE+ndWRn6ilSmdE";
+  }
+]