Fix the cinder backup permission issue when enable ceph

Closes-Bug: #1587244
Change-Id: I22ed3c57e4669c4372daf448da8385729c7cc8d1

ansible/roles/cinder/tasks/ceph.yml

@@ -52,5 +52,6 @@
     mode: "0600"
   with_items:
     - { service_name: "cinder-volume", key_name: "cinder", content: "{{ cephx_key_cinder.stdout }}" }
+    - { service_name: "cinder-backup", key_name: "cinder", content: "{{ cephx_key_cinder.stdout }}" }
     - { service_name: "cinder-backup", key_name: "cinder-backup", content: "{{ cephx_key_cinder_backup.stdout }}" }
   when: inventory_hostname in groups['cinder-volume']

ansible/roles/cinder/templates/cinder-backup.json.j2

@@ -14,6 +14,13 @@
             "perm": "0600",
             "optional": {{ (not enable_ceph | bool) | string | lower }}
         },
+        {
+            "source": "{{ container_config_directory }}/ceph.client.cinder.keyring",
+            "dest": "/etc/ceph/ceph.client.cinder.keyring",
+            "owner": "cinder",
+            "perm": "0600",
+            "optional": {{ (not enable_ceph | bool) | string | lower }}
+        },
         {
             "source": "{{ container_config_directory }}/ceph.conf",
             "dest": "/etc/ceph/ceph.conf",