Update in 'pre-flight-checks-openstack', main.yml (#288)

If an inventory has only [hypervisors] group defined and does NOT have [cinder] group, existing `when` condition in a 'cinder' related tasks is failing to execute because the current host(`inventory_hostname`) is not found in the `cinder` group. This patch is modifying that `when` condition to first check if the [cinder] group exist in the inventory and then check if the current host is part of it.

Author: cniket

roles/pre-flight-checks-openstack/tasks/main.yml

@@ -101,10 +101,10 @@
   stat:
     path: "{{cinder_image_conversion_cache}}"
   register: cinder_image_conversion_cache_dir_exists
-  when: inventory_hostname in groups['cinder']
+  when: "'cinder' in groups and inventory_hostname in groups['cinder']"
 
 - debug: var=cinder_image_conversion_cache_dir_exists
-  when: inventory_hostname in groups['cinder']
+  when: "'cinder' in groups and inventory_hostname in groups['cinder']"
 
 - block:
   - debug: msg="Validate minimum free space for cinder_image_conversion_cache (at least {{cinder_image_cache_min_free_space}} KBytes)"
@@ -118,4 +118,4 @@
   - fail:
       msg="Insufficient free space in {{cinder_image_conversion_cache}} (found {{cinder_cache_free_space.stdout.strip()}} mimimum required = {{cinder_image_cache_min_free_space}})"
     when: cinder_cache_free_space.stdout.strip() | int < cinder_image_cache_min_free_space
-  when: inventory_hostname in groups['cinder'] and cinder_image_conversion_cache_dir_exists == true
+  when: "'cinder' in groups and inventory_hostname in groups['cinder'] and cinder_image_conversion_cache_dir_exists == true"