system-config/system/hosts/mcp/configuration.nix

{ config, pkgs, ... }:
{
  imports = [
    ./vars.nix
    ./zfs.nix
    ./containers.nix
  ];

  # Enable flakes
  nix.settings.experimental-features = [
    "nix-command"
    "flakes"
  ];

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

  # Set the kernel to be compatible with ZFS
  boot.kernelPackages = config.boot.zfs.package.latestCompatibleLinuxPackages;

  networking.hostName = "mcp"; # Define your hostname.
  networking.hostId = "5e292f2d"; # Define a host ID for ZFS with `head -c 8 /etc/machine-id`
  # networking.wireless.enable = true;  # Enables wireless support via wpa_supplicant.

  # Configure network proxy if necessary
  # networking.proxy.default = "http://user:password@proxy:port/";
  # networking.proxy.noProxy = "127.0.0.1,localhost,internal.domain";

  # Enable networking
  networking.networkmanager.enable = true;

  # Set your time zone.
  time.timeZone = "America/Los_Angeles";

  # Select internationalisation properties.
  i18n.defaultLocale = "en_US.UTF-8";

  i18n.extraLocaleSettings = {
    LC_ADDRESS = "en_US.UTF-8";
    LC_IDENTIFICATION = "en_US.UTF-8";
    LC_MEASUREMENT = "en_US.UTF-8";
    LC_MONETARY = "en_US.UTF-8";
    LC_NAME = "en_US.UTF-8";
    LC_NUMERIC = "en_US.UTF-8";
    LC_PAPER = "en_US.UTF-8";
    LC_TELEPHONE = "en_US.UTF-8";
    LC_TIME = "en_US.UTF-8";
  };

  # Configure keymap in X11
  services.xserver.xkb = {
    layout = "us";
    variant = "";
  };

  # Define a user account. Don't forget to set a password with ‘passwd’.
  users.users.drew = {
    isNormalUser = true;
    description = "Drew Haven";
    extraGroups = [
      "networkmanager"
      "wheel"
      "docker-registry"
      "docker"
    ];
    shell = pkgs.zsh;
    # Enable linger so that systemd services run for this user are started and
    # persist even without an active session.
    linger = true;
  };

  # List packages installed in system profile. To search, run:
  # $ nix search wget
  environment.systemPackages = with pkgs; [
    vim # Do not forget to add an editor to edit configuration.nix! The Nano editor is also installed by default.
    #  wget
  ];

  # Some programs need SUID wrappers, can be configured further or are
  # started in user sessions.
  # programs.mtr.enable = true;
  # programs.gnupg.agent = {
  #   enable = true;
  #   enableSSHSupport = true;
  # };

  programs.zsh.enable = true;

  # List services that you want to enable:

  # Enable the OpenSSH daemon.
  services.openssh.enable = true;

  services.dockerRegistry = {
    enable = true;
    port = 5000;
    openFirewall = true;
    # Bind to the podman network so Traefik can route to it.
    # Note that it may fail to start if this network has not been created yet,
    # so this has to be manually restarted when the system boots.
    listenAddress = "10.88.0.1";
  };

  services.prometheus = {
    exporters = {
      node = {
        enable = true;
        enabledCollectors = [ "systemd" ];
        port = 9002;
        # Open the firewall, but only listen on the internal address
        openFirewall = true;
        # Bind to the podman network so Traefik can route to it.
        # Note that it may fail to start if this network has not been created yet,
        # so this has to be manually restarted when the system boots.
        listenAddress = "10.88.0.1";
      };
    };
  };

  ### Syncthing relay
  # So I don't have to use public relays
  services.syncthing.relay = {
    enable = true;
    # Leave this empty, meaning it won't join any public pools.
    pools = [ ];
  };

  ### Firewall
  # Open ports in the firewall.
  networking.firewall.allowedTCPPorts = [
    22067 # Syncthing relay
    22070 # Syncthing relay status
  ];
  # networking.firewall.allowedUDPPorts = [ ... ];
  # Or disable the firewall altogether.
  # networking.firewall.enable = false;

  ### Secrets
  sops = {
    defaultSopsFile = ../../../secrets/mcp.yaml;
    age = {
      # Use the host key for sops
      sshKeyPaths = [ "/etc/ssh/ssh_host_ed25519_key" ];
      # Where to store the key
      keyFile = "/var/lib/sops-nix/key.txt";
      # Generate the key if it doesn't exit
      generateKey = true;
    };
  };

  ### State version
  # 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 = "24.05"; # Did you read the comment?
}