feat(sterni/machines): add edwin r/5336

This adds edwin, the machine running sterni.lv, as well as my
idiosyncratic deployment solution. It is based on instantiating the
system configuration locally (where you'd work on the configuration),
copying the derivation files to the remote machine where the system
derivation is realised and deployed. Unfortunately, the first step tends
to be quite slow (despite gzip compression), so this may not be the
definite way despite its advantages.

Change-Id: I30f597692338df3981e01a1b7eee9cdad48f94cb
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7293
Reviewed-by: sterni <sternenseemann@systemli.org>
Tested-by: BuildkiteCI

1 files changed, 118 insertions, 0 deletions

diff --git a/users/sterni/machines/edwin/minecraft.nix b/users/sterni/machines/edwin/minecraft.nix
new file mode 100644
index 000000000000..6014a3d5795a
--- /dev/null
+++ b/users/sterni/machines/edwin/minecraft.nix
@@ -0,0 +1,118 @@
+{ pkgs, depot, config, ... }:
+
+let
+  carpet = pkgs.fetchurl {
+    url = "https://github.com/gnembon/fabric-carpet/releases/download/1.4.44/fabric-carpet-1.16.5-1.4.44+v210714.jar";
+    sha256 = "099nwspgxv7h2k3mwwmgcykmwfcb7yg1azb38fd4ravv97z4l3j8";
+  };
+
+  carpet-extra = pkgs.fetchurl {
+    url = "https://github.com/gnembon/carpet-extra/releases/download/1.4.43/carpet-extra-1.16.5-1.4.43.jar";
+    sha256 = "0w3gng1xyiqybm1qv4gbbsyqry3dr2ndvynx14qb59wxlw0dv5za";
+  };
+
+  userGroup = "minecraft";
+
+  makeJvmOpts = megs: [
+    "-Xms${toString megs}M"
+    "-Xmx${toString megs}M"
+  ];
+
+  whitelist = {
+    spreadwasser = "242a66eb-2df2-4585-9a28-ac763ad0d0f9";
+    sternenseemann = "d8e48069-1905-4886-a5da-a4ee917ee254";
+  };
+
+  rconPasswordFile = config.age.secretsDir + "/minecraft-rcon";
+
+  baseProperties = {
+    white-list = true;
+    allow-flight = true;
+    difficulty = "hard";
+    function-permission-level = 4;
+    snooper-enabled = false;
+    view-distance = 12;
+    sync-chunk-writes = "false"; # the single biggest performance fix
+    max-tick-time = 6000000; # TODO(sterni): disable watchdog via carpet
+  };
+in
+
+{
+  imports = [
+    ../../modules/minecraft-fabric.nix
+  ];
+
+  config = {
+    environment.systemPackages = [
+      pkgs.mcrcon
+      pkgs.jre
+    ];
+
+    users = {
+      users."${userGroup}" = {
+        isNormalUser = true;
+        openssh.authorizedKeys.keys = depot.users.sterni.keys.all;
+        shell = "${pkgs.fish}/bin/fish";
+      };
+
+      groups."${userGroup}" = { };
+    };
+
+    age.secrets = {
+      minecraft-rcon.file = depot.users.sterni.secrets."minecraft-rcon.age";
+    };
+
+    services.minecraft-fabric-server = {
+      creative = {
+        enable = true;
+        version = "1.16.5";
+        mods = [
+          carpet
+          carpet-extra
+        ];
+        world = config.users.users.${userGroup}.home + "/worlds/creative";
+
+        jvmOpts = makeJvmOpts 2048;
+        user = userGroup;
+        group = userGroup;
+
+        inherit whitelist rconPasswordFile;
+        ops = whitelist;
+
+        serverProperties = baseProperties // {
+          server-port = 25566;
+          "rcon.port" = 25576;
+          gamemode = "creative";
+          enable-command-block = true;
+          motd = "storage design server";
+          spawn-protection = 2;
+        };
+      };
+
+      carpet = {
+        enable = true;
+        version = "1.16.5";
+        mods = [
+          carpet
+          carpet-extra
+        ];
+        world = config.users.users.${userGroup}.home + "/worlds/carpet";
+
+        jvmOpts = makeJvmOpts 4096;
+        user = userGroup;
+        group = userGroup;
+
+        inherit whitelist rconPasswordFile;
+        ops = whitelist;
+
+        serverProperties = baseProperties // {
+          server-port = 25565;
+          "rcon.port" = 25575;
+          motd = "ich tu fleissig hustlen nenn mich bob der baumeister";
+
+          level-seed = 7240251176989694927; # for posterity
+        };
+      };
+    };
+  };
+}