improve minecraft performance by using a non nfs volume for live data

apps/minecraft/job.yaml

@@ -9,6 +9,16 @@ spec:
         app: minecraft-server
     spec:
       restartPolicy: OnFailure
+      initContainers:
+      - name: copy-data-to-local
+        image: alpine
+        command: ["/bin/sh"]
+        args: ["-c", "cp -r /data/* /local-data/"]
+        volumeMounts:
+        - name: local-data
+          mountPath: /local-data
+        - name: minecraft-data
+          mountPath: /data
       containers:
       - name: minecraft-server
         image: minecraft
@@ -49,12 +59,34 @@ spec:
           value: "false"
         - name: ENABLE_AUTOSTOP
           value: "true"
-        
+        - name: AUTOSTOP_TIMEOUT_EST
+          value: "1800" # stop 30 min after last disconnect
         volumeMounts:
-        - name: minecraft-data
+        - name: local-data
           mountPath: /data
 
+      - name: copy-data-to-persistent
+        image: rsync
+        command: ["/bin/sh"]
+        # args: ["-c", "sleep infinity"]
+        args: ["/run-rsync.sh"]
+        volumeMounts:
+        - name: local-data
+          mountPath: /local-data
+        - name: minecraft-data
+          mountPath: /persistent-data
+        - name: rsync-config
+          mountPath: /run-rsync.sh
+          subPath: run-rsync.sh
+
+
       volumes:
       - name: minecraft-data
         persistentVolumeClaim:
           claimName: minecraft-data
+      - name: local-data
+        emptyDir: {}
+      - name: rsync-config
+        configMap:
+          name: rsync-config
+          defaultMode: 0777