Mariadb: enable storage ownership management on pod start

This PS enables storage ownership management on pod start, which
is required for some PVC providers/provisioners.

Change-Id: Idb4bd20104815efb241ed163daddf27f8bd2b559

mariadb/templates/statefulset.yaml

@@ -40,6 +40,22 @@ spec:
         {{ .Values.labels.node_selector_key }}: {{ .Values.labels.node_selector_value }}
       initContainers:
 {{ tuple $envAll $dependencies list | include "helm-toolkit.snippets.kubernetes_entrypoint_init_container" | indent 8 }}
+{{- if .Values.volume.chown_on_start }}
+        - name: mariadb-perms
+          image: {{ .Values.images.tags.mariadb }}
+          imagePullPolicy: {{ .Values.images.pull_policy }}
+          securityContext:
+            runAsUser: 0
+{{ tuple $envAll $envAll.Values.pod.resources.server | include "helm-toolkit.snippets.kubernetes_resources" | indent 10 }}
+          command:
+            - chown
+            - -R
+            - "mysql:mysql"
+            - /var/lib/mysql
+          volumeMounts:
+            - name: mysql-data
+              mountPath: /var/lib/mysql
+{{- end }}
       containers:
         - name: mariadb
           image: {{ .Values.images.tags.mariadb }}

mariadb/values.yaml

@@ -53,6 +53,7 @@ dependencies:
 force_bootstrap: false
 
 volume:
+  chown_on_start: true
   enabled: true
   class_name: general
   size: 5Gi