145 lines
4.6 KiB
Nix
145 lines
4.6 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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with lib.hlissner;
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let
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cfg = config.services.minecraft-servers;
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in
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{
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options.services.minecraft-servers = {
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enable = mkBoolOpt false;
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eula = mkBoolOpt false;
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dataDir = mkOpt types.path "/srv/minecraft";
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servers = mkOption {
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default = { };
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type = types.attrsOf (types.submodule {
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options = {
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enable = mkBoolOpt false;
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whitelist = mkOption {
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type =
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let
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minecraftUUID = types.strMatching
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"[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}" // {
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description = "Minecraft UUID";
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};
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in
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types.attrsOf minecraftUUID;
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default = { };
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};
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serverProperties = mkOpt (with types; attrsOf (oneOf [ bool int str ])) { };
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package = mkOpt types.package pkgs.minecraft-server;
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jvmOpts = mkOpt (types.separatedString " ") "-Xmx2048M -Xms2048M";
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};
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});
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};
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};
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config = mkIf cfg.enable
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(
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let
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servers = attrsets.filterAttrs (_: cfg: cfg.enable) cfg.servers;
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in
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{
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users.users.minecraft = {
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description = "Minecraft server service user";
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home = cfg.dataDir;
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createHome = true;
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isSystemUser = true;
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group = "minecraft";
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};
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users.groups.minecraft = { };
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assertions = [
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{
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assertion = cfg.eula;
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message = "You must agree to Mojangs EULA to run minecraft-servers."
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+ " Read https://account.mojang.com/documents/minecraft_eula and"
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+ " set `services.minecraft-servers.eula` to `true` if you agree.";
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}
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];
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systemd.services = attrsets.mapAttrs'
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(name: conf:
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let
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serverDir = "${cfg.dataDir}/${name}";
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tmux = "${getBin pkgs.tmux}/bin/tmux";
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tmuxSock = "/run/minecraft/${name}.sock";
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startScript = pkgs.writeScript "minecraft-start-${name}" ''
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#!${pkgs.runtimeShell}
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cd ${serverDir}
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${tmux} -S ${tmuxSock} new -d ${conf.package}/bin/minecraft-server ${conf.jvmOpts}
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'';
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stopScript = pkgs.writeScript "minecraft-stop-${name}" ''
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#!${pkgs.runtimeShell}
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if ! [ -d "/proc/$1" ]; then
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exit 0
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fi
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${tmux} -S ${tmuxSock} send-keys stop Enter
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'';
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in
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{
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name = "minecraft-server-${name}";
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value = {
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description = "Minecraft Server ${name}";
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wantedBy = [ "multi-user.target" ];
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after = [ "network.target" ];
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serviceConfig = {
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ExecStart = "${startScript}";
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ExecStop = "${stopScript} $MAINPID";
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Restart = "always";
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User = "minecraft";
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Type = "forking";
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GuessMainPID = true;
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RuntimeDirectory = "minecraft";
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};
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preStart =
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let
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eula = builtins.toFile "eula.txt" ''
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# eula.txt managed by NixOS Configuration
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eula=true
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'';
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whitelist = pkgs.writeText "whitelist.json"
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(builtins.toJSON
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(mapAttrsToList (n: v: { name = n; uuid = v; }) conf.whitelist));
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serverProperties =
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let
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cfgToString = v: if builtins.isBool v then boolToString v else toString v;
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in
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pkgs.writeText "server.properties" (''
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# server.properties managed by NixOS configuration
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'' + concatStringsSep "\n" (mapAttrsToList
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(n: v: "${n}=${cfgToString v}")
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conf.serverProperties));
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in
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''
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mkdir -p ${serverDir}
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${pkgs.coreutils}/bin/chmod 770 ${cfg.dataDir}
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${pkgs.coreutils}/bin/chmod 770 ${serverDir}
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cd ${serverDir}
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ln -sf ${eula} eula.txt
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ln -sf ${whitelist} whitelist.json
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cp -f ${serverProperties} server.properties
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'';
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postStart = ''
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${pkgs.coreutils}/bin/chmod 660 ${tmuxSock}
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'';
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};
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})
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servers;
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}
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);
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}
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