85 lines
2.3 KiB
Nix
85 lines
2.3 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.clerie.minecraft-server;
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# We don't allow eula=false anyways
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eulaFile = builtins.toFile "eula.txt" ''
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# eula.txt managed by NixOS Configuration
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eula=true
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'';
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generateServerUnit = name: server: (
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nameValuePair "minecraft-server-${name}" (mkIf server.enable {
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description = "Minecraft Server ${name}";
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wantedBy = [ "multi-user.target" ];
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after = [ "network.target" ];
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serviceConfig = {
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ExecStart = "${server.package}/bin/minecraft-server ${server.jvmOpts}";
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Restart = "always";
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WorkingDirectory = if server.dataDir != null then server.dataDir else "/var/lib/minecraft-server-${name}";
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StateDirectory = "minecraft-server-${name}";
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DynamicUser = true;
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};
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preStart = ''
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ln -sf ${eulaFile} eula.txt
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'';
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})
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);
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serverOpts = { config, ... }@moduleAttrs: {
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options = {
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enable = mkEnableOption "A shared minecraft hosting service.";
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dataDir = mkOption {
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type = with types; nullOr path;
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default = null;
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description = ''
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Directory to store Minecraft database and other state/data files.
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When null defaulting to /var/lib/minecraft-server-${name}
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'';
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};
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package = mkOption {
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type = types.package;
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default = pkgs.papermc;
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defaultText = "pkgs.papermc";
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example = literalExample "pkgs.minecraft-server_1_12_2";
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description = "Version of minecraft-server to run.";
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};
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jvmOpts = mkOption {
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type = types.separatedString " ";
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default = "-Xmx2G -Xms1G";
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# Example options from https://minecraft.gamepedia.com/Tutorials/Server_startup_script
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example = "-Xmx2048M -Xms4092M -XX:+UseG1GC -XX:+CMSIncrementalPacing "
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+ "-XX:+CMSClassUnloadingEnabled -XX:ParallelGCThreads=2 "
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+ "-XX:MinHeapFreeRatio=5 -XX:MaxHeapFreeRatio=10";
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description = "JVM options for the Minecraft server.";
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};
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};
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};
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in {
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options = {
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clerie.minecraft-server = {
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servers = mkOption {
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type = with types; attrsOf (submodule serverOpts);
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default = {};
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};
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};
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};
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config = {
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systemd.services = (mapAttrs' generateServerUnit cfg.servers);
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};
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}
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