Refactor ATM10 Minecraft server configuration by making it systemd instead, because of script bakedness.

nix-system-configs/modules/system/minecraft.nix

@@ -7,10 +7,6 @@
   choose = paths: builtins.head (builtins.filter (p: builtins.pathExists p) paths);
   # Domain and Cloudflare DDNS records configured here. Update this list to add/remove records.
   domain = "prg-radio.org";
-  # Try to use the nix-minecraft helper if the overlay is present; otherwise
-  # fall back to a local path. If you use the fallback, ensure the path is an
-  # unpacked modpack directory with `mods` and `config` subdirectories.
-  modpack = /srv/minecraft/modpacks/atm10;
 in {
   options.local = {
     hostname = lib.mkOption {
@@ -70,130 +66,6 @@ in {
       eula = true;
       openFirewall = true;
 
-      servers.all-the-mods-tss = {
-        enable = true;
-        autoStart = true;
-        restart = "always";
-
-        package = pkgs.neoforgeServers.neoforge-1_21_1-21_1_224;
-
-        jvmOpts = lib.concatStringsSep " " [
-          "-Xms4G"
-          "-Xmx45G"
-          "-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"
-        ];
-
-        serverProperties = {
-          server-port = 25566;
-          motd = "The Sub Server All the Mods 10";
-          difficulty = "hard";
-          gamemode = "survival";
-          max-players = 64;
-          online-mode = true;
-          white-list = false;
-          spawn-protection = 0;
-          view-distance = 9;
-          simulation-distance = 3;
-          enforce-secure-profile = false;
-          enable-command-block = false;
-          enable-rcon = false;
-          require-resource-pack = false;
-          level-type = "minecraft:amplified";
-          level-seed = "-2032795982907864146";
-
-          # Added properties (do not overwrite existing ones above)
-          accepts-transfers = false;
-          allow-flight = true;
-          allow-nether = true;
-          broadcast-console-to-ops = true;
-          broadcast-rcon-to-ops = true;
-          bug-report-link = "";
-          enable-jmx-monitoring = false;
-          enable-query = false;
-          enable-status = true;
-          enforce-whitelist = false;
-          entity-broadcast-range-percentage = 100;
-          force-gamemode = false;
-          function-permission-level = 2;
-          generate-structures = true;
-          hardcore = false;
-          hide-online-players = false;
-          initial-disabled-packs = "";
-          initial-enabled-packs = "vanilla";
-          level-name = "world";
-          log-ips = true;
-          max-chained-neighbor-updates = 1000000;
-          max-tick-time = 180000;
-          max-world-size = 29999984;
-          network-compression-threshold = 256;
-          op-permission-level = 4;
-          player-idle-timeout = 0;
-          prevent-proxy-connections = false;
-          pvp = true;
-          # dotted keys must be quoted
-          "query.port" = 25566;
-          rate-limit = 0;
-          "rcon.password" = "";
-          "rcon.port" = 25575;
-          region-file-compression = "deflate";
-          resource-pack = "";
-          resource-pack-id = "";
-          resource-pack-prompt = "";
-          resource-pack-sha1 = "";
-          server-ip = "";
-          spawn-animals = true;
-          spawn-monsters = true;
-          spawn-npcs = true;
-          sync-chunk-writes = true;
-          text-filtering-config = "";
-          use-native-transport = true;
-          # white-list, view-distance, simulation-distance, spawn-protection, etc.
-          # were kept above to avoid overwriting existing values.
-        };
-
-        # Grant operator privileges to the user with the given UUID.
-        # Update `name` to the player's Minecraft username if you know it.
-        operators = {
-          username1 = {
-            uuid = "5e52c4ba-9b1a-469b-8f68-b9d684eae31d";
-            level = 4; # 4 = highest permission (operator)
-            bypassesPlayerLimit = true;
-          };
-        };
-
-        symlinks = {
-          "mods" = "${modpack}/mods";
-          "datapacks" = "${modpack}/datapacks";
-          "user_jvm_args.txt" = "${modpack}/user_jvm_args.txt";
-        };
-        files = {
-          "config" = "${modpack}/config";
-          "patchouli_books" = "${modpack}/patchouli_books";
-          "defaultconfigs" = "${modpack}/defaultconfigs";
-          "kubejs" = "${modpack}/kubejs";
-          "local" = "${modpack}/local";
-          ".mixin.out" = "${modpack}/.mixin.out";
-          "dynamic-data-pack-cache" = "${modpack}/dynamic-data-pack-cache";
-        };
-      };
-
       servers.fabric-modded = {
         enable = true;
         autoStart = true;
@@ -509,24 +381,6 @@ in {
       );
     };
 
-    # Ensure the other server unit also uses OpenJDK 21
-    systemd.services."minecraft-server-all-the-mods-tss".environment = {
-      JAVA_HOME = lib.mkForce "${pkgs.openjdk21}";
-      PATH = lib.mkForce (
-        lib.makeBinPath [
-          pkgs.openjdk21
-          pkgs.git
-          pkgs.git-lfs
-          pkgs.coreutils
-          pkgs.findutils
-          pkgs.gnugrep
-          pkgs.gnused
-          pkgs.systemd
-        ]
-        + ":/run/current-system/sw/bin"
-      );
-    };
-
     # The nix-minecraft module creates the `minecraft` user/group automatically.
     users.users.minecraftprg.extraGroups = ["minecraft"];
 
@@ -534,8 +388,36 @@ in {
       postgresql_jdbc
       git
       git-lfs
+      openjdk21
     ];
 
+    systemd.services.minecraft-atm10 = {
+      description = "All the Mods 10 Minecraft Server";
+      after = ["network.target"];
+      wantedBy = ["multi-user.target"];
+
+      serviceConfig = {
+        Type = "simple";
+        User = "minecraft";
+        Group = "minecraft";
+        WorkingDirectory = "/srv/minecraft/atm10tss";
+        ExecStart = "/srv/minecraft/atm10tss/run.sh";
+        Restart = "on-failure";
+        RestartSec = "10s";
+        StandardOutput = "journal";
+        StandardError = "journal";
+      };
+    };
+
+    # Optionally, ensure the user exists:
+    users.users.minecraft = {
+      isSystemUser = true;
+      home = "/srv/minecraft";
+      group = "minecraft";
+    };
+
+    users.groups.minecraft = {};
+
     system.stateVersion = "25.11";
   };
 }