Cinder: set ownership of co-ordination backend for backup service

This PS sets the ownership of the co-ordination backend location
when using the default file backend. This does not make the service
functional but prevents fatal errors when loading it.

Change-Id: I69a0838469f889172fb061f0adea34ca11d9c8c3

cinder/templates/deployment-backup.yaml

@@ -107,6 +107,21 @@ spec:
             - name: cinder-backup
               mountPath: {{ .Values.conf.cinder.DEFAULT.backup_posix_path }}
         {{ end }}
+        {{- if eq ( split "://" .Values.conf.cinder.coordination.backend_url )._0 "file" }}
+        - name: ceph-coordination-volume-perms
+          image: {{ .Values.images.tags.cinder_backup }}
+          imagePullPolicy: {{ .Values.images.pull_policy }}
+          securityContext:
+            runAsUser: 0
+          command:
+            - chown
+            - -R
+            - "cinder:"
+            - {{ ( split "://" .Values.conf.cinder.coordination.backend_url )._1 }}
+          volumeMounts:
+            - name: cinder-coordination
+              mountPath: {{ ( split "://" .Values.conf.cinder.coordination.backend_url )._1 }}
+        {{ end }}
       containers:
         - name: cinder-backup
           image: {{ .Values.images.tags.cinder_backup }}
@@ -144,6 +159,10 @@ spec:
             - name: cinder-backup
               mountPath: {{ .Values.conf.cinder.DEFAULT.backup_posix_path }}
             {{- end }}
+            {{- if eq ( split "://" .Values.conf.cinder.coordination.backend_url )._0 "file" }}
+            - name: cinder-coordination
+              mountPath: {{ ( split "://" .Values.conf.cinder.coordination.backend_url )._1 }}
+            {{- end }}
             - name: cinder-etc
               # NOTE (Portdirect): We mount here to override Kollas
               # custom sudoers file when using Kolla images, this
@@ -196,5 +215,11 @@ spec:
           persistentVolumeClaim:
             claimName: cinder-backup
         {{- end }}
+        {{- if eq ( split "://" .Values.conf.cinder.coordination.backend_url )._0 "file" }}
+        #NOTE (portdirect): this will need to be set to a shared mount amongst all cinder
+        # pods for the coordination backend to be fully functional.
+        - name: cinder-coordination
+          emptyDir: {}
+        {{- end }}
 {{ if $mounts_cinder_backup.volumes }}{{ toYaml $mounts_cinder_backup.volumes | indent 8 }}{{ end }}
 {{- end }}

cinder/values.yaml

@@ -446,6 +446,8 @@ conf:
       lock_path: "/var/lib/cinder/tmp"
     oslo_messaging_notifications:
       driver: messagingv2
+    coordination:
+      backend_url: file:///var/lib/cinder/coordination
   backends:
     # Those options will be written to backends.conf as-is.
     rbd1: