Add backwards compatibility of ceph_components format

With [1] we have broken compatibility of potentially provided extra components
config without any notice.

In order to handle this now we fix backwards compatibility along with
adding a deprecation note on the format of ``client``.

[1] https://review.opendev.org/c/openstack/openstack-ansible-ceph_client/+/882827

Closes-Bug: #2047783
Change-Id: I89b67f0f0545d799194d8486a6bb25227279af84

doc/source/configure-ceph.rst

@@ -159,7 +159,7 @@ configurations need to be added to the user variable file:
     - component: gnocchi_api
       package: "{{ python_ceph_packages }}"
       client:
-        - '{{ gnocchi_ceph_client }}'
+        - name: '{{ gnocchi_ceph_client }}'
       service: '{{ ceph_gnocchi_service_names }}'
 
 

releasenotes/notes/ceph_components_format-3a947aa47ed2ff71.yaml

@@ -0,0 +1,13 @@
+---
+
+deprecations:
+  - |
+    Format of ``client`` key inside ``ceph_extra_components`` variable has been
+    deprecated in favor of a mapping with one required attribute ``name``.
+    Having ``client`` key defined as a simple list is kept for backwards compatibility
+    but will be removed in future releases.
+
+fixes:
+  - |
+    Backwards compatibility of ``client`` key inside ``ceph_extra_components`` variable
+    has been fixed to support both a list and a list of mappings.

vars/main.yml

@@ -59,7 +59,7 @@ ceph_extra_components: []
 #    package:
 #      - "{{ python_ceph_package }}"
 #    client:
-#      - '{{ gnocchi_ceph_client }}'
+#      - name: '{{ gnocchi_ceph_client }}'
 #    service: '{{ ceph_gnocchi_service_names }}'
 
 ceph_client_filtered_packages: |-
@@ -94,7 +94,9 @@ ceph_client_filtered_clients: |-
             (cinder_service_backup_driver is defined and
              'ceph' in cinder_service_backup_driver))) %}
  {%       for client in comp.client %}
- {%         if client['enabled'] | default(true) | bool  %}
+ {%         if client is not mapping %}
+ {%           set _ = clients.append({'name': client}) %}
+ {%         elif client['enabled'] | default(true) | bool  %}
  {%           set _ = clients.append(client) %}
  {%         endif %}
  {%       endfor %}