[stable/traefik] allow use of existing pvc (#3930)

stable/traefik/Chart.yaml

@@ -1,6 +1,6 @@
 apiVersion: v1
 name: traefik
-version: 1.23.0
+version: 1.24.0
 appVersion: 1.5.2
 description: A Traefik based Kubernetes ingress controller with Let's Encrypt support
 keywords:

stable/traefik/README.md

@@ -117,6 +117,7 @@ The following tables lists the configurable parameters of the Traefik chart and
 | `acme.persistence.enabled`      | Create a volume to store ACME certs (if ACME is enabled)             | `true`                                    |
 | `acme.persistence.storageClass` | Type of `StorageClass` to request-- will be cluster-specific         | `nil` (uses alpha storage class annotation) |
 | `acme.persistence.accessMode`   | `ReadWriteOnce` or `ReadOnly`                                        | `ReadWriteOnce`                           |
+| `acme.persistence.existingClaim`| An Existing PVC name                                                 | `nil`                                     |
 | `acme.persistence.size`         | Minimum size of the volume requested                                 | `1Gi`                                     |
 | `dashboard.enabled`             | Whether to enable the Traefik dashboard                              | `false`                                   |
 | `dashboard.domain`              | Domain for the Traefik dashboard                                     | `traefik.example.com`                     |

stable/traefik/templates/acme-pvc.yaml

@@ -1,4 +1,4 @@
-{{- if and .Values.acme.enabled .Values.acme.persistence.enabled }}
+{{- if and .Values.acme.enabled .Values.acme.persistence.enabled (not .Values.acme.persistence.existingClaim) }}
 kind: PersistentVolumeClaim
 apiVersion: v1
 metadata:

stable/traefik/templates/deployment.yaml

@@ -129,7 +129,7 @@ spec:
       - name: acme
       {{- if .Values.acme.persistence.enabled }}
         persistentVolumeClaim:
-          claimName: {{ template "traefik.fullname" . }}-acme
+          claimName: {{ .Values.acme.persistence.existingClaim | default (printf "%s-acme" (include "traefik.fullname" .)) }}
       {{- else }}
         emptyDir: {}
       {{- end }}

stable/traefik/values.yaml

@@ -136,6 +136,11 @@ acme:
     # storageClass: "-"
     accessMode: ReadWriteOnce
     size: 1Gi
+    ## A manually managed Persistent Volume Claim
+    ## Requires persistence.enabled: true
+    ## If defined, PVC must be created manually before volume will be bound
+    ##
+    # existingClaim:
 dashboard:
   enabled: false
   domain: traefik.example.com