Add persistence.existingClaim configuration, closes #22262 (#22994)

Signed-off-by: Maarten de Waard <maarten@greenhost.nl>

stable/rocketchat/Chart.yaml

@@ -1,6 +1,6 @@
 apiVersion: v1
 name: rocketchat
-version: 2.0.3
+version: 2.0.4
 appVersion: 3.2.2
 description: Prepare to take off with the ultimate chat platform, experience the next level of team communications
 keywords:

stable/rocketchat/README.md

@@ -65,6 +65,7 @@ Parameter | Description | Default
 `persistence.storageClass` | Storage class of the PVC to use | `""`
 `persistence.accessMode` | Access mode of the PVC | `ReadWriteOnce`
 `persistence.size` | Size of the PVC | `8Gi`
+`persistence.existingClaim` | An Existing PVC name for rocketchat volume | `""`
 `resources` | Pod resource requests and limits | `{}`
 `securityContext.enabled` | Enable security context for the pod | `true`
 `securityContext.runAsUser` | User to run the pod as | `999`

stable/rocketchat/templates/deployment.yaml

@@ -109,7 +109,7 @@ spec:
       - name: rocket-data
       {{- if .Values.persistence.enabled }}
         persistentVolumeClaim:
-          claimName: {{ template "rocketchat.fullname" . }}
+          claimName: {{ if .Values.persistence.existingClaim }}{{ .Values.persistence.existingClaim }}{{- else }}{{ template "rocketchat.fullname" . }}{{- end }}
       {{- else }}
         emptyDir: {}
       {{- end }}

stable/rocketchat/values.yaml

@@ -101,6 +101,7 @@ mongodb:
 ##
 persistence:
   enabled: false
+  # existingClaim: existingClaimName
   ## rocketchat data Persistent Volume Storage Class
   ## If defined, storageClassName: <storageClass>
   ## If set to "-", storageClassName: "", which disables dynamic provisioning