about summary refs log tree commit diff
path: root/nixos/kanata/configuration.nix
blob: 417e5f4f003022059540a85d0f8c42cb30318132 (plain)
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
{ config, lib, input, pkgs, ... }:

let
  sefidelKeys = [ "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAILN14b5Fu+StHeMXq4ClyLG4G+/vCAfS7adxceEFria/ openpgp:0x1D5BCD11" ];
  maintainerKeys = [ ] ++ sefidelKeys;
in
{
  imports = [ ];

  deployment = {
    targetHost = "kanata.bee-polaris.ts.net";
    targetUser = "root";
  };

  boot.loader.systemd-boot.enable = true;
  boot.loader.efi.canTouchEfiVariables = true;

  boot.supportedFilesystems = [ "zfs" ];
  networking.hostId = "31cc5527";

  networking.hostName = "kanata";

  # Erase your darlings
  boot.initrd.postDeviceCommands = lib.mkAfter ''
    zfs rollback -r rpool/local/root@blank
  '';

  boot.kernelModules = [ "r8169" ];
  boot.initrd.kernelModules = [ "r8169" ];

  boot.initrd.network.enable = true;
  boot.initrd.network.ssh = {
    enable = true;

    # Using the same port as the actual SSH daemon will cause the clients to
    # throw errors related to host key mismatch.
    port = 2222;

    hostKeys = [
      # XXX: This has to be manually generated during NixOS install.
      # The files are then copied to initrd secrets during activation.
      "/persist/initrd/ssh_host_rsa_key"
      "/persist/initrd/ssh_host_ed25519_key"
    ];

    authorizedKeys = maintainerKeys;
  };

  boot.initrd.network.postCommands = ''
    cat <<EOF > /root/.profile
    if pgrep -x "zfs" > /dev/null
    then
      zfs load-key -a
      killall zfs
    else
      echo "ZFS is not running -- this could be a sign of failure."
    fi
    EOF
  '';

  modules.tailscale-initrd = {
    enable = true;
    # XXX: This has to be manually generatd during NixOS install.
    # The files are then copied to initrd secrets during activation.
    tailscaleStatePath = "/persist/initrd/tailscale-initrd.state";
  };

  services.openssh.enable = true;
  users.users.root.openssh.authorizedKeys.keys = maintainerKeys;

  fileSystems."/persist".neededForBoot = true;

  services.openssh.hostKeys = [
    {
      path = "/persist/ssh/ssh_host_ed25519_key";
      type = "ed25519";
    }
    {
      path = "/persist/ssh/ssh_host_rsa_key";
      type = "rsa";
      bits = 4096;
    }
  ];

  services.tailscale = {
    enable = true;
    useRoutingFeatures = "both";
    openFirewall = true;
  };

  environment.persistence."/persist".directories = [ "/var/lib/tailscale" ];

  sops.defaultSopsFile = ./secrets/secrets.yaml;

  powerManagement.cpuFreqGovernor = "ondemand";

  sops.secrets.zfs-smol-key = { };
  # sops.secrets.nextcloud-admin-pass = { };

  boot.kernel.sysctl."net.ipv4.ip_forward" = 1;
  boot.kernel.sysctl."net.ipv6.conf.all.forwarding" = 1;

  networking.firewall.enable = true;

  networking.nat = {
    enable = true;
    internalInterfaces = [ "ve-+" ];
    externalInterface = "enp3s0";
    # Lazy IPv6 connectivity for the container
    enableIPv6 = true;
  };

  modules = {
    services.blocky.enable = true;
  };

  # This option defines the first version of NixOS you have installed on this particular machine,
  # and is used to maintain compatibility with application data (e.g. databases) created on older NixOS versions.
  #
  # Most users should NEVER change this value after the initial install, for any reason,
  # even if you've upgraded your system to a new NixOS release.
  #
  # This value does NOT affect the Nixpkgs version your packages and OS are pulled from,
  # so changing it will NOT upgrade your system - see https://nixos.org/manual/nixos/stable/#sec-upgrading for how
  # to actually do that.
  #
  # This value being lower than the current NixOS release does NOT mean your system is
  # out of date, out of support, or vulnerable.
  #
  # Do NOT change this value unless you have manually inspected all the changes it would make to your configuration,
  # and migrated your data accordingly.
  #
  # For more information, see `man configuration.nix` or https://nixos.org/manual/nixos/stable/options#opt-system.stateVersion .
  system.stateVersion = "24.05"; # Did you read the comment?
}