Fix the ceph-mgr connect to cluster failed

For luminous, the ceph_mgr service provide the
dashborad for ceph, and it need connect to cluster,
but now it failed to connect ceph cluster due to
ceph.client.admin.keyring missing, this ps to fix it.

Co-Authored-By: chenqiaomin <chen.qiaomin@99cloud.net>
Closes-Bug: #1768462

Change-Id: Idb24661bc5674780db390220ca02e22975490663

ansible/roles/ceph/tasks/distribute_keyrings.yml

@@ -36,6 +36,17 @@
     - "{{ ceph_files['ceph.monmap'] }}"
   when: inventory_hostname in groups['ceph-mon']
 
+- name: Pushing Ceph keyrings for Mgrs
+  become: true
+  bslurp:
+    src: "{{ item.content }}"
+    dest: "{{ node_config_directory }}/ceph-mgr/{{ item.filename }}"
+    sha1: "{{ item.sha1 }}"
+    mode: 0600
+  with_items:
+    - "{{ ceph_files['ceph.client.admin.keyring'] }}"
+  when: inventory_hostname in groups['ceph-mgr']
+
 - name: Pushing Ceph keyrings for RGWs
   become: true
   bslurp:

ansible/roles/ceph/templates/ceph-mgr.json.j2

@@ -12,6 +12,12 @@
             "dest": "/var/lib/ceph/mgr/ceph-{{ inventory_hostname }}/keyring",
             "owner": "ceph",
             "perm": "0600"
+        },
+        {
+            "source": "{{ container_config_directory }}/ceph.client.admin.keyring",
+            "dest": "/etc/ceph/ceph.client.admin.keyring",
+            "owner": "ceph",
+            "perm": "0600"
         }
     ]
 }