Add MUDCraft Minecraft server infrastructure

- Purpur 1.21.4 server via itzg/docker-minecraft-server (java21)
- StatefulSet with 3 PVCs: worlds (20Gi), plugins (5Gi), logs (5Gi)
- Aikar G1GC JVM flags, 6GB heap (sized for Legion's 15GB RAM)
- Postgres: mudcraft database + user in existing platform/postgres
- RCON secret + DB password via ExternalSecret → Vault
- Traefik TCP entrypoint on port 25565 for mudcraft.nook.family
- mudcraft namespace via Terraform
- Argo CD app watching k8s/mudcraft/

servers/legion/apps/mudcraft.yaml

@@ -0,0 +1,20 @@
+apiVersion: argoproj.io/v1alpha1
+kind: Application
+metadata:
+  name: mudcraft
+  namespace: argocd
+spec:
+  project: default
+  source:
+    repoURL: http://10.43.1.53:3000/will/infrastructure.git
+    targetRevision: main
+    path: servers/legion/k8s/mudcraft
+  destination:
+    server: https://kubernetes.default.svc
+    namespace: mudcraft
+  syncPolicy:
+    automated:
+      prune: true
+      selfHeal: true
+    syncOptions:
+      - CreateNamespace=true

servers/legion/k8s/mudcraft/configmap.yaml

@@ -0,0 +1,62 @@
+---
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: mudcraft-config
+  namespace: mudcraft
+data:
+  # itzg/docker-minecraft-server env-based config
+  # These are injected as env vars — the entrypoint generates server.properties
+  TYPE: "PURPUR"
+  VERSION: "1.21.4"
+  DIFFICULTY: "hard"
+  MAX_PLAYERS: "40"
+  VIEW_DISTANCE: "8"
+  SIMULATION_DISTANCE: "6"
+  ALLOW_FLIGHT: "true"
+  ONLINE_MODE: "true"
+  SPAWN_PROTECTION: "0"
+  MAX_TICK_TIME: "-1"
+  RATE_LIMIT: "0"
+  ENFORCE_WHITELIST: "true"
+  WHITELIST_ENABLED: "true"
+  ENABLE_RCON: "true"
+  RCON_PORT: "25575"
+  MOTD: "MUDCraft — Private Beta"
+  MEMORY: ""  # Disabled — we set JVM flags directly
+  JVM_OPTS: >-
+    -Xms6G -Xmx6G
+    -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
+    -XX:+UseStringDeduplication
+    -Djava.awt.headless=true
+    -Dfile.encoding=UTF-8
+    -Dusing.aikars.flags=https://mcflags.emc.gs
+    -Daikars.new.flags=true
+  # Bukkit spawn limits — keep lower than default; MythicMobs adds custom mobs on top
+  OVERRIDE_BUKKIT_CONFIG: |
+    spawn-limits:
+      monsters: 40
+      animals: 8
+      water-animals: 3
+      water-ambient: 8
+      ambient: 4
+    ticks-per:
+      monster-spawns: 2
+      animal-spawns: 400

servers/legion/k8s/mudcraft/external-secrets.yaml

@@ -0,0 +1,23 @@
+---
+apiVersion: external-secrets.io/v1beta1
+kind: ExternalSecret
+metadata:
+  name: mudcraft-secrets
+  namespace: mudcraft
+spec:
+  refreshInterval: 1h
+  secretStoreRef:
+    name: vault
+    kind: ClusterSecretStore
+  target:
+    name: mudcraft-secrets
+    creationPolicy: Owner
+  data:
+    - secretKey: db-password
+      remoteRef:
+        key: secret/data/legion-db
+        property: mudcraft_db_password
+    - secretKey: rcon-password
+      remoteRef:
+        key: secret/data/mudcraft
+        property: rcon_password

servers/legion/k8s/mudcraft/ingressroutetcp.yaml

@@ -0,0 +1,15 @@
+---
+# Traefik TCP route — exposes mudcraft.nook.family:25565 → mudcraft service
+apiVersion: traefik.io/v1alpha1
+kind: IngressRouteTCP
+metadata:
+  name: mudcraft-minecraft
+  namespace: mudcraft
+spec:
+  entryPoints:
+    - minecraft
+  routes:
+    - match: HostSNI(`*`)
+      services:
+        - name: mudcraft
+          port: 25565

servers/legion/k8s/mudcraft/pvc.yaml

@@ -0,0 +1,39 @@
+---
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: mudcraft-worlds
+  namespace: mudcraft
+spec:
+  accessModes:
+    - ReadWriteOnce
+  storageClassName: local-path
+  resources:
+    requests:
+      storage: 20Gi
+---
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: mudcraft-plugins
+  namespace: mudcraft
+spec:
+  accessModes:
+    - ReadWriteOnce
+  storageClassName: local-path
+  resources:
+    requests:
+      storage: 5Gi
+---
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: mudcraft-logs
+  namespace: mudcraft
+spec:
+  accessModes:
+    - ReadWriteOnce
+  storageClassName: local-path
+  resources:
+    requests:
+      storage: 5Gi

servers/legion/k8s/mudcraft/service.yaml

@@ -0,0 +1,32 @@
+---
+# ClusterIP — Traefik TCP route targets this
+apiVersion: v1
+kind: Service
+metadata:
+  name: mudcraft
+  namespace: mudcraft
+spec:
+  selector:
+    app: mudcraft
+  ports:
+    - name: minecraft
+      port: 25565
+      targetPort: 25565
+      protocol: TCP
+  type: ClusterIP
+---
+# RCON — internal only, for server management
+apiVersion: v1
+kind: Service
+metadata:
+  name: mudcraft-rcon
+  namespace: mudcraft
+spec:
+  selector:
+    app: mudcraft
+  ports:
+    - name: rcon
+      port: 25575
+      targetPort: 25575
+      protocol: TCP
+  type: ClusterIP

servers/legion/k8s/mudcraft/statefulset.yaml

@@ -0,0 +1,89 @@
+---
+apiVersion: apps/v1
+kind: StatefulSet
+metadata:
+  name: mudcraft
+  namespace: mudcraft
+  labels:
+    app: mudcraft
+spec:
+  replicas: 1
+  serviceName: mudcraft
+  selector:
+    matchLabels:
+      app: mudcraft
+  template:
+    metadata:
+      labels:
+        app: mudcraft
+    spec:
+      terminationGracePeriodSeconds: 120
+      containers:
+        - name: mudcraft
+          image: itzg/minecraft-server:java21
+          imagePullPolicy: Always
+          ports:
+            - name: minecraft
+              containerPort: 25565
+              protocol: TCP
+            - name: rcon
+              containerPort: 25575
+              protocol: TCP
+          envFrom:
+            - configMapRef:
+                name: mudcraft-config
+          env:
+            - name: RCON_PASSWORD
+              valueFrom:
+                secretKeyRef:
+                  name: mudcraft-secrets
+                  key: rcon-password
+            - name: DB_URL
+              value: "jdbc:postgresql://postgres-postgresql.platform.svc.cluster.local:5432/mudcraft"
+            - name: DB_USER
+              value: "mudcraft"
+            - name: DB_PASSWORD
+              valueFrom:
+                secretKeyRef:
+                  name: mudcraft-secrets
+                  key: db-password
+          volumeMounts:
+            - name: worlds
+              mountPath: /data/worlds
+            - name: plugins
+              mountPath: /data/plugins
+            - name: logs
+              mountPath: /data/logs
+          resources:
+            requests:
+              memory: 7Gi
+              cpu: 2000m
+            limits:
+              memory: 8Gi
+              cpu: 6000m
+          lifecycle:
+            preStop:
+              exec:
+                command: ["/bin/sh", "-c", "rcon-cli stop && sleep 15"]
+          readinessProbe:
+            tcpSocket:
+              port: 25565
+            initialDelaySeconds: 60
+            periodSeconds: 15
+            failureThreshold: 10
+          livenessProbe:
+            tcpSocket:
+              port: 25565
+            initialDelaySeconds: 120
+            periodSeconds: 30
+            failureThreshold: 5
+      volumes:
+        - name: worlds
+          persistentVolumeClaim:
+            claimName: mudcraft-worlds
+        - name: plugins
+          persistentVolumeClaim:
+            claimName: mudcraft-plugins
+        - name: logs
+          persistentVolumeClaim:
+            claimName: mudcraft-logs

servers/legion/namespaces.tf

@@ -27,3 +27,13 @@ resource "kubernetes_namespace" "external_secrets" {
     }
   }
 }
+
+resource "kubernetes_namespace" "mudcraft" {
+  metadata {
+    name = "mudcraft"
+    labels = {
+      managed-by = "terraform"
+      tier       = "game"
+    }
+  }
+}

servers/legion/traefik.tf

@@ -19,6 +19,12 @@ resource "kubernetes_manifest" "traefik_config" {
           web:
             redirectTo:
               port: websecure
+          minecraft:
+            port: 25565
+            expose:
+              default: true
+            exposedPort: 25565
+            protocol: TCP
       YAML
     }
   }