add upgrade strategy for standalone mode (#1431)

helm/rustfs/templates/deployment.yaml

@@ -10,6 +10,10 @@ metadata:
     {{- end }}
 spec:
   replicas: 1
+  {{- with .Values.mode.standalone.strategy }}
+  strategy:
+    {{- toYaml . | nindent 4 }}
+  {{- end }}
   selector:
     matchLabels:
       {{- include "rustfs.selectorLabels" . | nindent 6 }}

helm/rustfs/values.yaml

@@ -30,6 +30,11 @@ fullnameOverride: ""
 mode:
   standalone:
     enabled: false
+    strategy:
+      type: RollingUpdate
+      rollingUpdate:
+        maxSurge: 0
+        maxUnavailable: 1
   distributed:
     enabled: true