monitoring: add volume for prometheus

apps/system/monitoring/prometheus.yaml

@@ -3,4 +3,15 @@ kind: Prometheus
 metadata:
   name: prometheus
 spec:
+  version: v2.14.0
   replicas: 1
+  securityContext:
+    runAsUser: 1000
+  walCompression: true
+  storage:
+    volumeClaimTemplate:
+      spec:
+        volumeName: prometheus
+        resources:
+          requests:
+            storage: 10Gi

apps/system/monitoring/volume.yaml

@@ -0,0 +1,11 @@
+apiVersion: v1
+kind: PersistentVolume
+metadata:
+  name: prometheus
+spec:
+  capacity:
+    storage: 10Gi
+  accessModes:
+  - ReadWriteOnce
+  hostPath:
+    path: /data/prometheus