nixos/applications/games/minecraft.nix

{

  skynet_dns.records = {
    external = [];
    cname = [
      # create a sub-subdomain for each game
      "compsoc_classic.minecraft.games  CNAME   games"
      "compsoc_test.minecraft.games     CNAME   games"
    ];
  };

  networking.firewall.allowedTCPPorts = [
    # for the proxy
    25565

    # the servers
    20000

    20001
  ];

  # arion is one way to use docker on nixos
  # see https://gitlab.com/c2842/computer_society/nixos/-/blob/733b867f4782afa795848135a83e97a5cafaf16a/applications/games/minecraft.nix
  # for an example of a single compose file with multiple services
  virtualisation.arion = {
    backend = "docker";
    projects = {

      minecraft_proxy.settings.services.mc_proxy.service = {
        image = "itzg/mc-router:1.18.0";
        ports = [ "25565:25565/tcp" ];
        expose = [ "25565" ];
        command = [
          "--mapping=compsoc_classic.minecraft.games.skynet.ie=172.17.0.1:20000,compsoc_test.minecraft.games.skynet.ie=172.17.0.1:20001"
        ];
      };

      minecraft_compsoc_classic.settings.services.compsoc_classic.service = {
        image = "nimmis/spigot:latest";
          # setting these here as they arent special
          environment = {
            # this is what it last ran on
            SPIGOT_VER="1.18.2";
            EULA="true";
          };

          # where the config files are stored
          volumes = [  "/etc/games/minecraft/compsoc/test/config:/minecraft" ];

          ports = [
            "20000:25565/tcp"
          ];
      };

      minecraft_compsoc_test.settings.services.compsoc_test.service = {
        image = "nimmis/spigot:latest";
        environment = {
          # this is what it last ran on
          SPIGOT_VER="1.18.2";
          EULA="true";
        };

        # where the config files are stored
        volumes = [ "/etc/games/minecraft/compsoc/test2/config:/minecraft" ];

        ports = [
          "20001:25565/tcp"
        ];
      };
    };
  };
}