new mc server and config structuring

2026-07-05 11:11:32 +08:00 · 2026-07-05 11:11:32 +08:00 · 5ba636a096
commit 5ba636a096
parent 806f8d01de
5 changed files with 204 additions and 148 deletions
--- a/modules/system/homelab/mc/mc1-pure-vanilla.nix
+++ b/modules/system/homelab/mc/mc1-pure-vanilla.nix
@ -0,0 +1,71 @@
+{ inputs, lib, pkgs, ... }: let
+  name = "mc1-pure-vanilla";
+  ram-allocation-mb = 8192;
+  headroom-allocation-mb = 1024;
+  rcon-pass = "howdy";
+  
+  modpack = pkgs.fetchModrinthModpack {
+      url = "https://cdn.modrinth.com/data/2wkV8mHp/versions/mFGJP1Ye/Server%20Optimization%201.21.11-2.1.mrpack";
+      packHash = "sha256-AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=";
+      side = "server";
+    };
+in {
+  services.minecraft-servers.servers.${name} = {
+    enable = true;
+    autoStart = true;
+    restart = "always";
+    
+    serverProperties = {
+      server-ip = "0.0.0.0";
+      server-port = 25566;
+      server-name = name;
+      motd = "Season 4 - §6§lPure Vanilla ⛏";
+      log-ips = false;
+      hide-online-players = true; 
+      
+      difficulty = "normal";
+      gamemode = "survival";
+      max-world-size = 25000;
+      spawn-protection = 0;
+      pvp = true;
+      
+      online-mode = true;
+      enable-query = true;
+      enforce-secure-profile = false;
+      pevent-proxy-connections = false;
+      allow-flight = false;
+      player-idle-timeout = 0;
+      
+      view-distance = 10;
+      simulation-distance = 4;
+      
+      enable-rcon = true;
+      sync-chunk-writes = false;
+      "rcon.password" = rcon-pass;
+      "rcon.port" = 25576;
+    };
+    
+    symlinks = inputs.mc.lib.collectFilesAt modpack "mods"; # TODO: add cracked support
+    files = inputs.mc.lib.collectFilesAt modpack "config";
+    
+    package = pkgs.fabricServers.fabric-1_21_11.override {
+      jre_headless = pkgs.javaPackages.compiler.temurin-bin.jdk-25;
+      loaderVersion = "0.19.2";
+    };
+
+    jvmOpts = let flags = [
+      "-Xms${toString ram-allocation-mb}M"
+      "-Xmx${toString ram-allocation-mb}M"
+      
+      "-XX:+UseZGC" # Use ZGC (requires Java v25+, 8+ CPU cores, 10GB+ RAM)
+      "-XX:+ZGenerational" # Use generational ZGC (newer and better ZGC, requires Java v21+)
+      "-XX:+UseCompactObjectHeaders" # Use compact object headers (requires Java v16+, saves a couple of bits per object)
+      
+      "--add-modules=jdk.incubator.vector" # Exposes SIMD instructions (requires full JDK, useful with performance mods like C2ME)
+      "-XX:+AlwaysPreTouch" # Pre-allocates memory on startup, OS claims it immediately for JVM instead of negotiating it
+      "-XX:+DisableExplicitGC" # Disables mods from manually invoking the GC
+      "-XX:+PerfDisableSharedMem" # Disables constant /tmp writes for JVM metrics
+      "-XX:SoftMaxHeapSize=${toString (ram-allocation-mb - headroom-allocation-mb)}M" # Leave 2GB headroom
+    ]; in lib.concatStringsSep " " flags;
+  };
+}