tlaternet-server/configuration/services/minecraft.nix

{ config, pkgs, ... }:

let
  minecraft-server-args = [
    "-Xms2G"
    "-Xmx2G"
    "-Dsun.rmi.dgc.server.gcInterval=2157583646"
    "-XX:+UseG1GC"
    "-XX:+ParallelRefProcEnabled"
    "-XX:MaxGCPauseMillis=200"
    "-XX:+UnlockExperimentalVMOptions"
    "-XX:+DisableExplicitGC"
    "-XX:+AlwaysPreTouch"
    "-XX:G1NewSizePercent=30"
    "-XX:G1MaxNewSizePercent=40"
    "-XX:G1HeapRegionSize=8M"
    "-XX:G1ReservePercent=20"
    "-XX:G1HeapWastePercent=5"
    "-XX:G1MixedGCCountTarget=4"
    "-XX:InitiatingHeapOccupancyPercent=15"
    "-XX:G1MixedGCLiveThresholdPercent=90"
    "-XX:G1RSetUpdatingPauseTimePercent=5"
    "-XX:SurvivorRatio=32"
    "-XX:+PerfDisableSharedMem"
    "-XX:MaxTenuringThreshold=1"
  ];
  ops = pkgs.writeText "ops.json" (builtins.toJSON [{
    uuid = "140d177a-966f-41b8-a4c0-e305babd291b";
    name = "TLATER";
    level = 4;
    bypassesPlayerLimit = true;
  }]);
  whitelist = pkgs.writeText "whitelist.json" (builtins.toJSON [
    {
      uuid = "59cd1648-14a4-4bcf-8f5a-2e1bde678f2c";
      name = "romino25";
    }
    {
      uuid = "0ab6e3d1-544a-47e7-8538-2e6c248e49a4";
      name = "lasi25";
    }
    {
      uuid = "01c9e737-fc9d-4d55-b8c2-610ca80eb4be";
      name = "Nampeyo25";
    }
    {
      uuid = "140d177a-966f-41b8-a4c0-e305babd291b";
      name = "tlater";
    }
  ]);
  eula = pkgs.writeText "eula.txt" "eula=true";

in {
  nixpkgs.config.allowUnfreePredicate = pkg:
    builtins.elem (pkgs.lib.getName pkg) [ "forge-server" ];

  virtualisation.oci-containers.containers.minecraft-voor-kia =
    let properties = ./configs/minecraft/voor-kia/server.properties;
    in {
      image = "tlaternet/minecraft-voor-kia";

      imageFile = pkgs.dockerTools.buildImage {
        name = "tlaternet/minecraft-voor-kia";
        tag = "latest";
        contents = [
          (pkgs.local.forge-server.override {
            jre_headless = pkgs.jdk11_headless;
            mods = pkgs.local.voor-kia;
          })
        ];

        config = let
          # Use the upstream minecraft uid
          uid = toString config.ids.uids.minecraft;
          gid = toString config.users.groups.nogroup.gid;
        in {
          Cmd = [ "forge-server" ] ++ minecraft-server-args;
          WorkingDir = "/var/lib/minecraft";
          Volumes = { "/var/lib/minecraft" = { }; };
          ExposedPorts = { "25565" = { }; };
          User = "${uid}:${gid}";
        };
      };

      autoStart = false;
      ports = [ "25565:25565" ];
      volumes = [
        "minecraft:/var/lib/minecraft"
        "${properties}:/var/lib/minecraft/server.properties:ro"
        "${ops}:/var/lib/minecraft/ops.json:ro"
        "${whitelist}:/var/lib/minecraft/whitelist.json:ro"
        "${eula}:/var/lib/minecraft/eula.txt:ro"
      ];
    };
}