Use Ceph cluster name when setting minimum client version

If CephClusterName is set to it's non-default value, then
I4c3d8fee6c7a0c25cca4d1e6b731060684cd28b3 will cause the
deployment to fail as per the bug this patch closes.

Change-Id: Ia5611d7cb64808ac247873023e5aa5afd07f6698
Closes-Bug: #1915197
(cherry picked from commit 8149df4)

deployment/ceph-ansible/ceph-mon.yaml

@@ -42,6 +42,15 @@ parameters:
     type: boolean
     default: false
     description: Parameter used to trigger the dashboard deployment.
+  CephClusterName:
+    type: string
+    default: ceph
+    description: The Ceph cluster name.
+    constraints:
+    - allowed_pattern: "[a-zA-Z0-9]+"
+      description: >
+        The Ceph cluster name must be at least 1 character and contain only
+        letters and numbers.
 
 conditions:
   dashboard_enabled: {equals: [{get_param: CephEnableDashboard}, true]}
@@ -123,7 +132,9 @@ outputs:
                 register: ceph_mon_id
                 delegate_to: "{{ groups['ceph_mon'][0] }}"
               - name: Enforce minimum Ceph clients version to Mimic
-                command: "{{ container_cli }} exec {{ ceph_mon_id.stdout_lines[0] }} ceph osd set-require-min-compat-client mimic"
+                command: "{{ container_cli }} exec {{ ceph_mon_id.stdout_lines[0] }} ceph --cluster {{ cluster }} osd set-require-min-compat-client mimic"
                 delegate_to: "{{ groups['ceph_mon'][0] }}"
+                vars:
+                  cluster: {get_param: CephClusterName}
       external_update_tasks: {get_attr: [CephBase, role_data, external_update_tasks]}
       external_upgrade_tasks: {get_attr: [CephBase, role_data, external_upgrade_tasks]}