cinder: check for coordination backend when HA

Change-Id: I02817963c691784c126c79e330981e0cc771bc88
Related-Bug: #1904062

ansible/roles/cinder/tasks/precheck.yml

@@ -56,6 +56,15 @@
     - enable_cinder_backend_lvm | bool
     - inventory_hostname in groups['cinder-volume']
 
+- name: Checking for coordination backend if Ceph backend is enabled
+  run_once: True
+  fail:
+    msg: "Please enable redis or etcd when using Cinder Ceph backend"
+  when:
+    - not skip_cinder_backend_check | bool
+    - cinder_backend_ceph | bool
+    - cinder_coordination_backend == ''
+
 - name: Check if S3 configurations are defined
   assert:
     that:

tests/templates/globals-default.j2

@@ -140,6 +140,7 @@ enable_mariabackup: "yes"
 {% if scenario == "cephadm" %}
 # kolla-ansible vars
 enable_cinder: "yes"
+enable_redis: "yes"
 cinder_cluster_name: "kolla_ceph"
 # External Ceph
 glance_backend_ceph: "yes"