nixos/modules/nixos/linode.nix

{
  config,
  lib,
  pkgs,
  ...
}:

let
  cfg = config.greg.linode;

in
with lib;
{
  options.greg.linode = {
    enable = mkEnableOption "Set sensible defaults for a Linode host";

    bootTimeout = mkOption {
      type = types.int;
      default = 15;
      description = "Set bootloader timeout in seconds.";
    };
  };

  config = mkIf cfg.enable {
    # Enables connection over Linode consoles
    boot.kernelParams = [ "console=ttyS0,19200n8" ];
    boot.loader.grub = {
      device = "nodev";
      extraConfig = ''
        serial --speed=19200 --unit=0 --word=8 --parity=no --stop=1;
        terminal_input serial;
        terminal_output serial;
      '';
    };

    # Tells grub to ignore partion-free device warnings, since we are on Linode
    boot.loader.timeout = 15;

    networking.usePredictableInterfaceNames = false; # Use old style eth0 names
    networking.useDHCP = false;
    networking.interfaces.eth0.useDHCP = true;

    # Suggested diagnostic tools
    environment.systemPackages = with pkgs; [
      inetutils
      mtr
      sysstat
    ];
  };
}