zabbix: include statefulset defaults

apps/zabbix/zabbix.yaml

@@ -19,8 +19,13 @@ metadata:
   labels:
     app: zabbix-postgres
 spec:
+  persistentVolumeClaimRetentionPolicy:
+    whenDeleted: Retain
+    whenScaled: Retain
+  podManagementPolicy: OrderedReady
   serviceName: zabbix-postgres
   replicas: 1
+  revisionHistoryLimit: 10
   selector:
     matchLabels:
       app: zabbix-postgres
@@ -103,6 +108,10 @@ spec:
         resources:
           requests:
             storage: 10Gi
+  updateStrategy:
+    rollingUpdate:
+      partition: 0
+    type: RollingUpdate
 ---
 apiVersion: v1
 kind: Service