depot/ops/nixos/totoro/default.nix

# SPDX-FileCopyrightText: 2020 Luke Granger-Brown <depot@lukegb.com>
#
# SPDX-License-Identifier: Apache-2.0

{ depot, lib, pkgs, rebuilder, config, ... }:
let
  inherit (depot.ops) secrets;
in {
  imports =
    [ <nixpkgs/nixos/modules/installer/scan/not-detected.nix> ../lib/client.nix ];

  boot.initrd.availableKernelModules = [ "xhci_pci" "ahci" "nvme" "usb_storage" "usbhid" "sd_mod" ];
  boot.kernelModules = lib.mkAfter [ "kvm-intel" ];
  boot.kernelParams = [ "mitigations=off" ];

  fileSystems = let
    zfs = device: {
      device = device;
      fsType = "zfs";
    };
  in {
    "/" = zfs "zboot/safe/root";
    "/nix" = zfs "zboot/local/nix";

    "/home" = zfs "tank/safe/home";
    "/export" = zfs "tank/safe/export";

    "/boot" = {
      device = "/dev/disk/by-uuid/D178-4E19";
      fsType = "vfat";
    };
  };

  # Use the systemd-boot EFI boot loader.
  boot.loader.systemd-boot.enable = true;
  boot.loader.efi.canTouchEfiVariables = true;

  nix.maxJobs = lib.mkDefault 8;
  powerManagement.cpuFreqGovernor = lib.mkDefault "performance";

  # Extra packages.
  environment.systemPackages = with pkgs; [
    oven-media-engine
  ];

  # Networking!
  networking = {
    hostName = "totoro"; # Define your hostname.
    domain = "lukegb.xyz";
    hostId = "676c08c4";
    useDHCP = false;
    interfaces.br-ext.useDHCP = true;
    bridges.br-ext.interfaces = [ "enp0s31f6" ];
  };

  # Virtualisation
  virtualisation.libvirtd = {
    enable = true;
    allowedBridges = [ "virbr0" "br-ext" ];
  };
  users.users.lukegb = {
    packages = with depot.pkgs; [ irssi ];
    extraGroups = lib.mkAfter [ "libvirtd" ];
  };

  # NFS
  services.nfs.server = {
    enable = true;
    exports = ''
      /export 192.168.1.0/24(rw,sync,nohide,no_subtree_check,no_root_squash,wdelay,fsid=0,insecure,crossmnt)
    '';
  };
  networking.firewall.allowedTCPPorts = [ 111 2049 ];
  networking.firewall.allowedUDPPorts = [ 111 2049 ];

  # Distributed builds!
  nix.buildMachines = [ {
    hostName = "whitby";
    system = "x86_64-linux";
    maxJobs = 64;
    speedFactor = 2;
    supportedFeatures = [ "nixos-test" "benchmark" "big-parallel" "kvm" ];
    mandatoryFeatures = [ ];
  }] ;
  nix.distributedBuilds = true;
  nix.extraOptions = ''
    builders-use-substitutes = true
  '';

  system.stateVersion = "20.03";
}