Allow to skip pacemaker/corosync setup

Masakari monitors allow to have other clustering mechanisms
(like consul) then pacemaker/corosync.

So let users allow to skip deployment if they wanna use different
mechanism.

Change-Id: I3ab1ec3dbb69978b7d090914b7d51cc1d4f11dc9
Signed-off-by: Dmitriy Rabotyagov <dmitriy.rabotyagov@cleura.com>

playbooks/masakari.yml

@@ -28,6 +28,7 @@
   serial: "{{ masakari_monitor_serial | default('100%') }}"
   user: root
   vars:
+    pacemaker_corosync_install: true
     pacemaker_corosync_group: masakari_monitor
     pacemaker_corosync_ring_interface: "{{ masakari_monitor_corosync_multicast_interface }}"
     haveged_enabled: false
@@ -44,9 +45,18 @@
             - always
       tags:
         - always
-  roles:
-    - role: "pacemaker_corosync"
+  tasks:
+    - name: Create corosync cluster
+      ansible.builtin.include_role:
+        name: "pacemaker_corosync"
+        apply:
+          tags:
+            - pacemaker-corosync
       tags: pacemaker-corosync
+      when:
+        - pacemaker_corosync_install
+        - pacemaker_corosync_group in groups
+        - groups[pacemaker_corosync_group] | length > 0
 
 - name: Configure haproxy services
   ansible.builtin.import_playbook: openstack.osa.haproxy_service_config

releasenotes/notes/pacemaker_corosync-1f47c9f82516a729.yaml

@@ -0,0 +1,7 @@
+---
+
+features:
+  - |
+    Introduced variable ``pacemaker_corosync_install`` which allows to skip
+    pacemaker/corosync deployment in case some other mechanism is used for
+    masakari monitors.