[stable/nexcloud] Support PostgreSQL database (#15155)

Signed-off-by: Cedric Thiebault <cedric.thiebault@gmail.com>

stable/nextcloud/Chart.yaml

@@ -1,6 +1,6 @@
 apiVersion: v1
 name: nextcloud
-version: 1.4.0
+version: 1.5.0
 appVersion: 16.0.1
 description: A file sharing server that puts the control and security of your own data back into your hands.
 keywords:

stable/nextcloud/README.md

@@ -73,6 +73,7 @@ The following table lists the configurable parameters of the nextcloud chart and
 | `internalDatabase.enabled`          | Whether to use internal sqlite database       | `true`                                                  |
 | `internalDatabase.database`         | Name of the existing database                 | `nextcloud`                                             |
 | `externalDatabase.enabled`          | Whether to use external database              | `false`                                                 |
+| `externalDatabase.type`             | External database type: `mysql`, `postgresql` | `mysql`                                                 |
 | `externalDatabase.host`             | Host of the external database                 | `nil`                                                   |
 | `externalDatabase.database`         | Name of the existing database                 | `nextcloud`                                             |
 | `externalDatabase.user`             | Existing username in the external db          | `nextcloud`                                             |

stable/nextcloud/templates/deployment.yaml

@@ -51,6 +51,22 @@ spec:
               name: {{ printf "%s-%s" .Release.Name "db"  }}
               key: db-password
         {{- else }}
+          {{- if eq .Values.externalDatabase.type "postgresql" }}
+        - name: POSTGRES_HOST
+          value: {{ .Values.externalDatabase.host | quote }}
+        - name: POSTGRES_DB
+          value: {{ .Values.externalDatabase.database | quote }}
+        - name: POSTGRES_USER
+          valueFrom:
+            secretKeyRef:
+              name: {{ printf "%s-%s" .Release.Name "db" }}
+              key: db-username
+        - name: POSTGRES_PASSWORD
+          valueFrom:
+            secretKeyRef:
+              name: {{ printf "%s-%s" .Release.Name "db" }}
+              key: db-password
+          {{- else }}
         - name: MYSQL_HOST
           value: {{ .Values.externalDatabase.host | quote }}
         - name: MYSQL_DATABASE
@@ -65,6 +81,7 @@ spec:
             secretKeyRef:
               name: {{ printf "%s-%s" .Release.Name "db" }}
               key: db-password
+          {{- end }}
         {{- end }}
         - name: NEXTCLOUD_ADMIN_USER
           valueFrom:

stable/nextcloud/values.yaml

@@ -86,6 +86,9 @@ internalDatabase:
 externalDatabase:
   enabled: false
 
+  ## Supported database engines: mysql or postgresql
+  type: mysql
+
   ## Database host
   host: