[stable/drupal] Add global StorageClass to drupal (#16433)

Signed-off-by: Miguel A. Cabrera Minagorri <macabrera@bitnami.com>

stable/drupal/Chart.yaml

@@ -1,6 +1,6 @@
 apiVersion: v1
 name: drupal
-version: 5.0.0
+version: 5.1.0
 appVersion: 8.7.5
 description: One of the most versatile open source content management systems.
 keywords:

stable/drupal/README.md

@@ -51,6 +51,7 @@ The following table lists the configurable parameters of the Drupal chart and th
 | --------------------------------- | ------------------------------------------ | --------------------------------------------------------- |
 | `global.imageRegistry`            | Global Docker image registry               | `nil`                                                     |
 | `global.imagePullSecrets`         | Global Docker registry secret names as an array | `[]` (does not add image pull secrets to deployed pods) |
+| `global.storageClass`                     | Global storage class for dynamic provisioning                                               | `nil`                                                        |
 | `image.registry`                  | Drupal image registry                      | `docker.io`                                               |
 | `image.repository`                | Drupal Image name                          | `bitnami/drupal`                                          |
 | `image.tag`                       | Drupal Image tag                           | `{TAG_NAME}`                                              |

stable/drupal/templates/_helpers.tpl

@@ -118,3 +118,23 @@ imagePullSecrets:
 {{- end }}
 {{- end -}}
 {{- end -}}
+
+{{/*
+Return  the proper Storage Class
+*/}}
+{{- define "drupal.storageClass" -}}
+{{- $storageClass := "" }}
+{{- if .Values.persistence.drupal.storageClass -}}
+    {{- $storageClass = .Values.persistence.drupal.storageClass -}}
+{{- end -}}
+{{- if .Values.global -}}
+    {{- if .Values.global.storageClass -}}
+        {{- $storageClass = .Values.global.storageClass -}}
+    {{- end -}}
+{{- end -}}
+{{- if (eq "-" $storageClass) -}}
+    {{- printf "\"\"" -}}
+{{- else }}
+    {{- printf "%s" $storageClass -}}
+{{- end -}}
+{{- end -}}

stable/drupal/templates/drupal-pvc.yaml

@@ -17,11 +17,5 @@ spec:
   resources:
     requests:
       storage: {{ .Values.persistence.drupal.size | quote }}
-{{- if and .Values.persistence.drupal.storageClass (not .Values.persistence.drupal.hostPath) -}}
-{{- if (eq "-" .Values.persistence.drupal.storageClass) }}
-  storageClassName: ""
-{{- else }}
-  storageClassName: "{{ .Values.persistence.drupal.storageClass }}"
-{{- end }}
-{{- end }}
+  storageClassName: {{ include "drupal.storageClass" . }}
 {{- end -}}

stable/drupal/values.yaml

@@ -6,6 +6,7 @@
 #   imageRegistry: myRegistryName
 #   imagePullSecrets:
 #     - myRegistryKeySecretName
+#   storageClass: myStorageClass
 
 ## Bitnami Drupal image version
 ## ref: https://hub.docker.com/r/bitnami/drupal/tags/