Support for NixOS ❄️

[jlengelbrecht]

Would really love to see support added for nixos servers. I am switching over the majority of my infrastructure to nixos to allow for a better IaC based environment. Nixos does support the use of docker and docker-compose but currently when you add a nix server in coolify it says its not supported even with docker & docker compose being installed on the server itself. Would it be possible to add support for nix servers in the future?

{ config, lib, pkgs, ... }:
let
    vars = import ./vars.nix;
in
{
  imports = [ ./hardware-configuration.nix ];
  
  boot.loader.grub.device = "/dev/sda";

  services.openssh = {
    enable = true;
    settings = {
      PasswordAuthentication = false;
      KbdInteractiveAuthentication = false;
    };
  };


  services.qemuGuest.enable = true;

  security.sudo.wheelNeedsPassword = false;

  users.users."${vars.username}" = {
    isNormalUser = true;
    extraGroups = [ "wheel" "docker" ];      # <--------------------- Adds docker group to user
    openssh.authorizedKeys.keys = [ vars.public_key ];
  };

  nix.settings.trusted-users = [ vars.username ];

  networking = {
    defaultGateway = { address = vars.gateway; interface = "eth0"; };
    dhcpcd.enable = false;
    interfaces.eth0.useDHCP = false;
  };

  systemd.network.enable = true;

  time.timeZone = vars.time_zone;
  
  environment.systemPackages = with pkgs; [
    pkgs.vim
    pkgs.wget
    pkgs.git
    pkgs.docker  # <------------------- Installs docker on Nixos 🐋
    pkgs.docker-compose # <-------------------- Installs docker-compose on Nixos 🐙
  ];
  
  virtualisation.docker.enable = true;  # <--------------- Enables docker virtualization 
  virtualisation.docker.rootless = { # <---------------- Sets up docker to be rootless  
    enable = true;
    setSocketVariable = true;
  };

  nixpkgs.config.allowUnfree = true;
  networking.firewall.enable = false;
  
  system.stateVersion = "24.05";

  services.cloud-init = {
    enable = true;
    network.enable = true;
    config = ''
          system_info:
            distro: nixos
            network:
              renderers: [ 'networkd' ]
            default_user:
              name: testbox
          users:
              - name: testbox
          ssh_pwauth: false
          chpasswd:
            expire: false
          cloud_init_modules:
            - migrator
            - seed_random
            - growpart
            - resizefs
          cloud_config_modules:
            - disk_setup
            - mounts
            - set-passwords
            - ssh
          cloud_final_modules: []
          '';
  };
}

[testbox@nixos:~/.ssh]$ docker --version
Docker version 27.3.1, build v27.3.1

[testbox@nixos:~/.ssh]$ docker-compose --version
Docker Compose version 2.29.7

[rotteegher]

Would be great if we could use NixOS server as a build server! 🙏