Add modded minecraft server

README.md

@@ -4,7 +4,7 @@ Using [colmena](https://github.com/zhaofengli/colmena)
 ## Hosts
 - `bloodletting`: Main server
 
-## Manual setup on blank system/migrations
+### Manual setup on blank system/migrations
 - `colmena apply` - deploy config
 - `passwd` - set user passwords
 - rsync state:
@@ -21,6 +21,9 @@ Using [colmena](https://github.com/zhaofengli/colmena)
     - `prometheus2`
   - `/home/ftp`
 
+### Rsyncd Modules
+Modded minecraft instance rsync modules can be accessed through `mc-[modpack]@bloodletting::mc-[modpack]` with `--rsh=ssh`
+
 ## Reference configs used
   - https://github.com/Xe/nixos-configs
   - https://git.nora.codes/nora/nixconfig

common/fragments/minecraft.nix

@@ -0,0 +1,61 @@
+{ pkgs, config, lib, ... }:
+let
+  rsyncSSHKeys = config.users.users.agatha.openssh.authorizedKeys.keys
+    ++ config.users.users.julia.openssh.authorizedKeys.keys;
+
+  jre8 = pkgs.temurin-bin-8;
+  jre17 = pkgs.temurin-bin-17;
+
+  jvmOpts = lib.concatStringsSep " " [
+    "-XX:+UseG1GC"
+    "-XX:+ParallelRefProcEnabled"
+    "-XX:MaxGCPauseMillis=200"
+    "-XX:+UnlockExperimentalVMOptions"
+    "-XX:+DisableExplicitGC"
+    "-XX:+AlwaysPreTouch"
+    "-XX:G1NewSizePercent=40"
+    "-XX:G1MaxNewSizePercent=50"
+    "-XX:G1HeapRegionSize=16M"
+    "-XX:G1ReservePercent=15"
+    "-XX:G1HeapWastePercent=5"
+    "-XX:G1MixedGCCountTarget=4"
+    "-XX:InitiatingHeapOccupancyPercent=20"
+    "-XX:G1MixedGCLiveThresholdPercent=90"
+    "-XX:G1RSetUpdatingPauseTimePercent=5"
+    "-XX:SurvivorRatio=32"
+    "-XX:+PerfDisableSharedMem"
+    "-XX:MaxTenuringThreshold=1"
+  ];
+
+  serverDefaults = {
+    white-list = true;
+    spawn-protection = 0;
+    allow-flight = true;
+  };
+in {
+  services.modded-minecraft-servers = {
+    eula = true;
+
+    instances = {
+      # End to End encrypted modded minecraft yay
+      e2e = {
+        enable = true;
+        inherit rsyncSSHKeys jvmOpts;
+
+        jvmMaxAllocation = "8G";
+        jvmPackage = jre8;
+
+        serverConfig = serverDefaults // {
+          server-port = 25565;
+          rcon-port = 25566;
+          motd = "Enigmeowtica 2: Expert";
+          extra-options.level-type = "BIOMESOP";
+        };
+      };
+    };
+  };
+
+  systemd.services.mc-e2e.path = with pkgs; [ getconf gawk ];
+
+  users.users.agatha.packages = with pkgs; [ mcrcon ];
+}