nixos/hosts/faunus-ater.nix

{
  pkgs,
  lib,
  config,
  inputs,
  ...
}: let
  sopsPath = key: config.sops.secrets.${key}.path;

  mkVirtHost = certificateName:
    lib.attrsets.recursiveUpdate {
      addSSL = true;
      listenAddresses = [vpnIPv4 "[${vpnIPv6}]"];
      sslTrustedCertificate = pkgs.writeText "ca.crt" (builtins.readFile ../secrets/ca.crt);
      sslCertificateKey = sopsPath "certificate-key-${certificateName}";
      sslCertificate = pkgs.writeText "${certificateName}.crt" (builtins.readFile ../secrets/pub/${certificateName}.crt);
    };

  vpnIPv4 = config.state.vpn.ipv4;
  vpnIPv6 = config.state.vpn.ipv6;
in {
  imports = [
    inputs.nixos-hardware.nixosModules.common-cpu-intel #-cpu-only
    ../modules/nginx-reverse-proxy.nix
    ../hardware/asrock-z370-i3-black-box.nix
  ];
  config = {
    networking.hostName = "faunus-ater";
    networking.hostId = "a4d7bec4";
    networking.interfaces.eno1.useDHCP = true;

    # === Make sure ZFS works ===
    # TODO: Update and think of some automatic way of keeping this up to date.
    boot.kernelPackages = pkgs.linuxPackages_5_15;

    # === Can't handle this ===
    systemd.enableEmergencyMode = false;

    # === Settings ===
    settings.ssh.openOutsideVPN = true;

    # === ZFS services ===
    services.zfs.trim.enable = true;
    services.zfs.autoScrub.enable = true;
    services.zfs.autoScrub.pools = ["rpool"];

    # === Additional services ===
    services.fwupd.enable = true;
    powerManagement = {
      enable = true;
      powertop.enable = true;
      cpuFreqGovernor = "powersave";
    };

    # === Git.home, because everything else sucks ===
    services.gogs = {
      enable = true;
      stateDir = "/data/dirty/gogs";
      appName = "Malte's Secret Git Stash";
      cookieSecure = true;
      database.passwordFile = sopsPath "gogs-database-password";
      httpPort = config.state.services.git.port;
      rootUrl = "https://git.tammena.me/";
      domain = "git.tammena.me";
      # FIXME: Remove after upstream fix of database type
      extraConfig = ''
        [database]
        TYPE = sqlite3

        [auth]
        DISABLE_REGISTRATION = true
        SHOW_REGISTRATION_BUTTON = false

        [server]
        SSH_PORT = 22222
      '';
    };
    services.nginx.virtualHosts."git.home" = mkVirtHost "git-home" {
      locations."/" = {
        proxyPass = "http://${config.services.gogs.httpAddress}:${builtins.toString config.services.gogs.httpPort}";
        proxyWebsockets = true;
      };
    };

    virtualisation.oci-containers.backend = "podman";
    virtualisation.podman = {
      enable = true;
      dockerCompat = true;
      extraPackages = with pkgs; [zfs];
    };
    # Override storage driver
    virtualisation.containers.storage.settings = {
      storage = {
        driver = "zfs";
        graphroot = "/var/lib/containers/storage";
        runroot = "/run/containers/storage";
      };
    };

    virtualisation.oci-containers.containers."timetagger" = {
      image = "ghcr.io/almarklein/timetagger:v23.2.1";
      ports = ["5873:5873"];
      environment = {
        TIMETAGGER_BIND = "0.0.0.0:5873";
        TIMETAGGER_DATADIR = "/root/_timetagger";
        TIMETAGGER_LOG_LEVEL = "info";
        TIMETAGGER_CREDENTIALS = "malte:$2a$08$P.e3SD0cnPK0P4mFYShELuoa37.1e1dEqE8MWa6LJ/kSJfje1BdBi,marie:$2a$08$ubOZWO510y5bgwIl0O4Ne.dKZdWoHqEMzvs56L6esqvLfBJ/6OgYm";
      };
      volumes = [
        "/data/dirty/timetagger:/root/_timetagger"
      ];
    };
    services.nginx.virtualHosts."time.home" = mkVirtHost "time-home" {
      locations."/" = {
        proxyPass = "http://127.0.0.1:5873";
        proxyWebsockets = true;
      };
    };

    services.nginx.virtualHosts."todo.home" = mkVirtHost "todo-home" {
      locations."/" = {
        proxyPass = "http://127.0.0.1:7372";
        proxyWebsockets = true;
      };
    };

    services.nginx.virtualHosts."support.home" = mkVirtHost "support-home" {
      locations."/" = {
        proxyPass = "http://127.0.0.1:9999";
        proxyWebsockets = true;
      };
    };

    services.nginx.virtualHosts."config.home" = mkVirtHost "config-home" {
      locations."/" = {
        proxyPass = "http://127.0.0.1:8123";
        proxyWebsockets = true;
      };
    };
    virtualisation.oci-containers.containers.home-assistant = {
      volumes = ["/data/dirty/home-assistant:/config"];
      environment.TZ = "Europe/Berlin";
      image = "ghcr.io/home-assistant/home-assistant:2023.9";
      ports = [
        "8123:8123"
        "1400:1400/tcp"
      ];
      extraOptions = [
        # TODO: Fix the path of the zigbee controller using udev
        "--device=/dev/serial/by-id/usb-Silicon_Labs_Sonoff_Zigbee_3.0_USB_Dongle_Plus_0001-if00-port0"
        "--device=/dev/ttyUSB0"
        "--cap-add=CAP_NET_RAW,CAP_NET_BIND_SERVICE"
      ];
    };
    # For SONOS
    networking.firewall.allowedTCPPorts = [1400];

    # === HYDRA & Friends. ===
    services.hydra = {
      enable = true;
      package = pkgs.hydra;
      notificationSender = "hydra@home";
      hydraURL = "http://faunus-ater:${builtins.toString config.services.hydra.port}";
      minimumDiskFree = 10;
      useSubstitutes = true;
    };
    services.nix-serve = {
      enable = true;
      secretKeyFile = sopsPath "nix-store-signing-key";
      # FIXME: Remove once fixed upstream
      package = pkgs.nix-serve.override {
        nix = pkgs.nixVersions.nix_2_12;
      };
    };
    # Build on other machines aswell if possible
    nix.buildMachines = [
      {
        hostName = "localhost";
        maxJobs = 4;
        speedFactor = 1;
        sshKey = sopsPath "hydra-overseer-key";
        sshUser = "hydra-minion";
        systems = ["x86_64-linux" "i686-linux"];
      }
      {
        hostName = "helix-texta";
        maxJobs = 4;
        speedFactor = 2;
        sshKey = sopsPath "hydra-overseer-key";
        sshUser = "hydra-minion";
        supportedFeatures = ["kvm" "big-parallel"];
        systems = ["x86_64-linux" "i686-linux"];
      }
      {
        hostName = "murex-pecten";
        maxJobs = 4;
        speedFactor = 4;
        sshKey = sopsPath "hydra-overseer-key";
        sshUser = "hydra-minion";
        supportedFeatures = ["kvm" "big-parallel"];
        systems = ["x86_64-linux" "i686-linux"];
      }
    ];
    # TODO: This doesn't seem to work
    programs.ssh.extraConfig = ''
      Host *
        StrictHostKeyChecking accept-new
    '';
    nix.extraOptions = ''
      allowed-uris = http:// https://
    '';
    systemd.services."hydra-initial-setup" = {
      description = "Setup hydra admin password once";
      serviceConfig = {
        Type = "oneshot";
        RemainAfterExit = true;
        LoadCredential = "USER_PW:${sopsPath "hydra-admin-password"}";
      };
      wantedBy = lib.singleton "multi-user.target";
      requires = lib.singleton "hydra-init.service";
      after = lib.singleton "hydra-init.service";
      environment = {
        inherit (config.systemd.services.hydra-init.environment) HYDRA_DBI;
      };
      script = let
        hydra-create-user = "${pkgs.hydra}/bin/hydra-create-user";
      in ''
        if [ ! -e ~hydra/.setup-is-complete ]; then
          # create admin user
          ${hydra-create-user} admin --full-name 'Admin Mc. Admining' --email-address 'admin@faunus-ater' --password "$USER_PW" --role admin || exit 1
          # done
          touch ~hydra/.setup-is-complete
        fi
      '';
    };
    services.nginx.virtualHosts = {
      "hydra.home" = mkVirtHost "hydra-home" {
        locations."/" = {
          proxyPass = "http://localhost:${builtins.toString config.services.hydra.port}";
        };
      };
      "cache.home" = mkVirtHost "cache-home" {
        locations."/" = {
          proxyPass = "http://localhost:${builtins.toString config.services.nix-serve.port}";
        };
      };
    };

    # === PAPERLESS service, save me! ===
    services.paperless = {
      enable = true;
      address = "[::1]";
      passwordFile = sopsPath "paperless-admin-password";
      dataDir = "/data/dirty/paperless";
      extraConfig = {
        PAPERLESS_CONSUMER_DELETE_DUPLICATES = true;
        PAPERLESS_CONSUMER_RECURSIVE = true;
        PAPERLESS_CONSUMER_SUBDIRS_AS_TAGS = true;
        PAPERLESS_FILENAME_FORMAT = "{created_year}/{correspondent}/{created_year}-{created_month}-{created_day}-{document_type}-{title}-{tag_list}";
        PAPERLESS_OCR_LANGUAGE = "deu";
        PAPERLESS_URL = "https://doc.home";
      };
    };
    services.nginx.virtualHosts."doc.home" = mkVirtHost "doc-home" {
      locations."/" = {
        proxyPass = "http://[::1]:${builtins.toString config.services.paperless.port}";
        proxyWebsockets = true;
      };
    };

    # === Komga, for my reading needs ===
    services.komga = {
      enable = true;
      port = config.state.services.read.port;
      stateDir = "/data/dirty/komga";
    };
    services.nginx.virtualHosts."read.home" = mkVirtHost "read-home" {
      locations."/" = {
        proxyPass = "http://[::1]:${builtins.toString config.services.komga.port}";
        proxyWebsockets = true;
      };
    };

    # === Trilium ===
    services.trilium-server = {
      enable = true;
      port = 10302;
      dataDir = "/data/dirty/trilium";
    };
    services.nginx.virtualHosts."note.home" = mkVirtHost "note-home" {
      locations."/" = {
        proxyPass = "http://${config.services.trilium-server.host}:${builtins.toString config.services.trilium-server.port}";
        proxyWebsockets = true;
      };
    };

    # === Photoprism ===
    services.photoprism = {
      enable = true;
      port = 2342;
      storagePath = "/data/dirty/photoprism/storage";
      originalsPath = "/data/dirty/photoprism/originals";
      importPath = "/data/dirty/photoprism/import";
      passwordFile = sopsPath "photoprism-admin-password";
      settings = {
        PHOTOPRISM_SESSION_MAXAGE = "31536000";
        PHOTOPRISM_SESSION_TIMEOUT = "31536000";
        PHOTOPRISM_UPLOAD_NSFW = "true";
        PHOTOPRISM_DETECT_NSFW = "true";
        PHOTOPRISM_SITE_URL = "https://foto.home";
        PHOTOPRISM_SITE_TITLE = "PhotoPrism";
        PHOTOPRISM_SITE_CAPTION = "All the pictures!";
        PHOTOPRISM_SITE_DESCRIPTION = "";
        PHOTOPRISM_SITE_AUTHOR = "";
      };
    };
    # TODO: Why does it not work without these? :/
    systemd.services.photoprism.serviceConfig.User = lib.mkForce null;
    systemd.services.photoprism.serviceConfig.Group = lib.mkForce null;
    systemd.services.photoprism.serviceConfig.DynamicUser = lib.mkForce false;
    systemd.services.photoprism.serviceConfig.SystemCallFilter = lib.mkForce [];
    services.nginx.virtualHosts."foto.home" = mkVirtHost "foto-home" {
      locations."/" = {
        proxyPass = "http://localhost:${builtins.toString config.services.photoprism.port}";
        proxyWebsockets = true;
      };
      extraConfig = ''
        client_max_body_size 500M;
      '';
    };

    # === Restic User Backup ===
    services.resticConfigured = {
      enable = true;
      rootDir = "/data/dirty/restic";
      openFirewall = true;
    };

    users.users.sftp = {
      description = "User used for all sftp stuff";
      isNormalUser = true;
      group = "sftp";
      openssh.authorizedKeys.keyFiles = [
        ../secrets/users/malte/sftp-key.pub
        ../secrets/users/marie/sftp-key.pub
      ];
    };
    users.groups.sftp = {};

    hardware.cpu.intel.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;

    # === BACKUPS ===
    services.restic.backups = {
      # Make sure my 'active IO' disk get's saved once a day
      zdirty = {
        initialize = true;
        repository = "/data/archive/dirty.bak";
        timerConfig.OnCalendar = "daily";
        paths = lib.singleton "/data/dirty";
        pruneOpts = [
          "--keep-daily 1"
          "--keep-weekly 1"
          "--keep-monthly 1"
          "--keep-yearly 5"
        ];
        passwordFile = sopsPath "internal-restic-password";
      };
    };

    # === RUNTIME SECRETS ===
    sops.defaultSopsFile = ../secrets/hosts/faunus-ater/secrets.yaml;
    sops.age.sshKeyPaths = ["/etc/ssh/ssh_host_ed25519_key"];
    sops.secrets = let
      nginxSecret = {
        owner = config.users.users.nginx.name;
        mode = "0400";
      };
    in {
      "certificate-key-config-home" = nginxSecret;
      "certificate-key-todo-home" = nginxSecret;
      "certificate-key-time-home" = nginxSecret;
      "certificate-key-support-home" = nginxSecret;
      "certificate-key-hydra-home" = nginxSecret;
      "certificate-key-cache-home" = nginxSecret;
      "certificate-key-doc-home" = nginxSecret;
      "certificate-key-read-home" = nginxSecret;
      "certificate-key-note-home" = nginxSecret;
      "certificate-key-foto-home" = nginxSecret;
      "certificate-key-listen-home" = nginxSecret;
      "certificate-key-git-home" = nginxSecret;
      "paperless-admin-password" = {};
      "photoprism-admin-password" = {};
      "nginx-cert-key" = nginxSecret;
      "nginx-cert-crt" = nginxSecret;
      "fritzbox-exporter-env" = {};
      "internal-restic-password" = {};
      "nix-store-signing-key" = {};
      "hydra-admin-password" = {
        owner = config.users.users.hydra.name;
        mode = "0400";
      };
      "hydra-overseer-key" = {
        owner = config.users.users.hydra.name;
        mode = "0440";
      };
      "gogs-database-password" = {
        owner = config.users.users.gogs.name;
        mode = "0400";
      };
    };

    # All services that run here, that should be exposed need to be exposed on the VPN
    networking.firewall.interfaces.${config.services.tailscale.interfaceName}.allowedTCPPorts = let
      selectPort = _: config: config.port;
      filterRunningHereAndExposed = lib.attrsets.filterAttrs (_: conf: conf.host == config.networking.hostName && conf ? external && conf.external);
    in
      lib.attrsets.mapAttrsToList selectPort (filterRunningHereAndExposed config.state.services);

    # This value determines the NixOS release from which the default
    # settings for stateful data, like file locations and database versions
    # on your system were taken. It‘s perfectly fine and recommended to leave
    # this value at the release version of the first install of this system.
    # Before changing this value read the documentation for this option
    # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
    system.stateVersion = "22.05"; # Did you read the comment?
  };
}