ops/nixos/whitby/default.nix


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163

{ depot, lib, ... }:

let
  nixpkgs = import depot.third_party.nixpkgsSrc {};

  systemForConfig = configuration: (depot.third_party.nixos {
    inherit configuration;
  }).system;
in systemForConfig {
  inherit depot;
  imports = [
    "${depot.depotPath}/ops/nixos/depot.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.frog
          ];

          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
        '';
      };
    };

    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";
    hostId = "b38ca543";
    useDHCP = false;
    defaultGateway6 = "fe80::1";

    firewall.allowedTCPPorts = [ 22 80 443 ];

    interfaces.enp196s0.useDHCP = true;
    interfaces.enp196s0.ipv6.addresses = [
      {
        address = "2a01:04f8:0242:5b21::feed:edef:beef";
        prefixLength = 64;
      }
    ];
  };

  time.timeZone = "UTC";

  nix = {
    maxJobs = lib.mkDefault 64;
  };

  programs.mtr.enable = true;
  services.openssh.enable = true;

  environment.systemPackages = with nixpkgs; [
    bb
    curl
    emacs-nox
    git
    htop
    nano
    vim
    zfs
    zfstools
  ];

  users = {
    users.root.openssh.authorizedKeys.keys = [
      depot.users.tazjin.keys.frog
    ];

    users.tazjin = {
      isNormalUser = true;
      extraGroups = [ "git" "wheel" ];
      openssh.authorizedKeys.keys = [
        depot.users.tazjin.keys.frog
      ];
    };

    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.glittershark.keys.whitby
      ];
    };

    # Set up a user & group for git shenanigans
    groups.git = {};
    users.git = {
      group = "git";
      isNormalUser = false;
    };
  };

  system.stateVersion = "20.03";
}