depot/ops/nixos/howl/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 = [
    ../lib/zfs.nix
    ../lib/graphical-client.nix
    ../lib/whitby-distributed.nix
  ];

  boot.initrd.availableKernelModules = [
    "xhci_pci"
    "ahci"
    "nvme"
    "usbhid"
    "usb_storage"
    "sd_mod"
    "rtsx_pci_sdmmc"
  ];
  boot.kernelModules = [ "kvm-intel" ];
  boot.kernelParams = [ "button.lid_init_state=open" ];
  boot.supportedFilesystems = [ "ntfs" ];
  boot.kernel.sysctl = {
    "abi.vsyscall32" = "0";
  };

  my.rundeck.expectedOnline = false;

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

    "/var" = zfs "zpool/safe/var";
    "/home" = zfs "zpool/safe/home";
    "/persist" = zfs "zpool/safe/persist";

    "/boot" = {
      device = "/dev/disk/by-label/NIXBOOT";
      fsType = "vfat";
    };
  };

  nix.maxJobs = lib.mkDefault 12;
  powerManagement.cpuFreqGovernor = lib.mkDefault "powersave";
  hardware.enableRedistributableFirmware = true;

  # Laptop, don't autodeploy.
  my.deploy.enable = false;

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

  # ZFS!
  services.zfs.rollbackOnBoot.enable = true;

  # Enable libvirtd.
  virtualisation.libvirtd = {
    enable = true;
  };

  networking.hostName = "howl";
  networking.hostId = "cdd51451";

  # Boot faster.
  systemd.services.systemd-udev-settle.enable = false;
  systemd.services.NetworkManager-wait-online.enable = false;

  # The global useDHCP flag is deprecated, therefore explicitly set to false here.
  # Per-interface useDHCP will be mandatory in the future, so this generated config
  # replicates the default behaviour.
  # Use NetworkManager instead.
  networking.useDHCP = false;
  networking.interfaces.eno1.useDHCP = false;
  networking.networkmanager.enable = true;
  #my.ip.tailscale = "100.125.26.108";

  # Set your time zone.
  time.timeZone = "Europe/London";

  # List packages installed in system profile. To search, run:
  # $ nix search wget
  environment.systemPackages = with pkgs; [
    pciutils
    deluge
  ];

  # Enable the X11 windowing system.
  services.xserver.enable = true;
  services.xserver.layout = "us";
  services.xserver.libinput.enable = true;
  services.xserver.windowManager.i3.enable = true;
  services.xserver.videoDrivers = [ "intel" ];
  services.xserver.displayManager.gdm = {
    enable = true;
  };

  hardware.opengl.driSupport32Bit = true;
  hardware.opengl.extraPackages = with pkgs; [
    intel-media-driver vaapiVdpau libvdpau-va-gl libva
  ];
  hardware.opengl.extraPackages32 = with pkgs.pkgsi686Linux; [ libva ];
  hardware.acpilight.enable = true;

  # TODO(lukegb): finish evaluating pipewire
  hardware.pulseaudio.enable = lib.mkForce false;
  services.pipewire = {
    enable = true;
    alsa.enable = true;
    alsa.support32Bit = true;
    jack.enable = true;
    pulse.enable = true;

    media-session.enable = true;
  };

  # Define a user account.
  users.users.lukegb = {
    extraGroups = [ "wheel" "networkmanager" "libvirtd" "video" ];
  };
  my.home-manager.system = {...}: {
    home.packages = lib.mkAfter (with pkgs; [
      steam
      (writeScriptBin "javaws" ''
        #!/bin/sh
        exec ${depot.nix.pkgs.javaws-env}/bin/javaws-env "$@"
      '')
      factorio-experimental
      (depot.nix.pkgs.secretsync.configure {
        workingDir = "/home/lukegb/depot";
        gitlabAccessToken = secrets.deployer.gitlabAccessToken;
        manifestVariable = "SECRETS_MANIFEST";
        variablesToFile = {
          "OPS_SECRETS_DEFAULT_NIX" = "ops/secrets/default.nix";
        };
      })
      efibootmgr
      iw
      obs-studio
      vulkan-tools
    ]);
  };

  # Things to persist.
  services.openssh.hostKeys = [
    {
      path = "/persist/etc/ssh/ssh_host_ed25519_key";
      type = "ed25519";
    }
    {
      path = "/persist/etc/ssh/ssh_host_rsa_key";
      type = "rsa";
      bits = 4096;
    }
  ];
  environment.etc = {
    "NetworkManager/system-connections" = {
      source = "/persist/etc/NetworkManager/system-connections/";
    };
  };
  systemd.tmpfiles.rules = [
    "d /var/lib/libvirt 0755 root - - -"
  ];
  systemd.mounts = let
    bindMount' = dir: {
      unitConfig.RequiresMountsFor = dir;
      options = "bind";
      what = "/persist${dir}";
      where = dir;
    };
    bindMountSvc = dir: svc: (bindMount' dir) // {
      bindsTo = [svc];
      partOf = [svc];
    };
    bindMount = dir: (bindMount' dir) // {
      wantedBy = ["multi-user.target"];
    };
  in [
    (bindMountSvc "/var/lib/libvirt" "libvirtd.service")
    (bindMount "/root")
  ];

  # Enable Thunderbolt device management.
  services.hardware.bolt.enable = true;

  services.avahi.enable = true;

  nix.buildMachines = [ {
    hostName = "totoro";
    system = "x86_64-linux";
    maxJobs = 4;
    speedFactor = 2;
    supportedFeatures = [ "nixos-test" "benchmark" "big-parallel" "kvm" ];
    mandatoryFeatures = [ ];
  }];

  # This value determines the NixOS release with which your system is to be
  # compatible, in order to avoid breaking some software such as database
  # servers. You should change this only after NixOS release notes say you
  # should.
  system.stateVersion = "21.05"; # Did you read the comment?
}