Fix os_quota when volume service not available

os_quota checks the current quotas for compute, network and volume
services and fails when no volume service is found in the catalog.

Since openstack test deployments without volume services are common,
os_quota shouldn't fail if such service is missing.

This was originally fixed in d31a09ceb7
and later adapted to catch exceptions raised by shade. Since then, this
module moved to using openstacksdk, which doesn't catch the exception
raised by keystoneauth1.

Fixes #41240

(cherry picked from commit 1aca1f21f9)

changelogs/fragments/41240-fix-os_quota-without-cinder.yaml

@@ -0,0 +1,3 @@
+---
+bugfixes:
+  - "os_quota - fix failure to set compute or network quota when volume service is not available"

lib/ansible/modules/cloud/openstack/os_quota.py

@@ -107,6 +107,7 @@ options:
 requirements:
     - "python >= 2.7"
     - "openstacksdk >= 0.13.0"
+    - "keystoneauth1 >= 3.4.0"
 '''
 
 EXAMPLES = '''
@@ -225,7 +226,17 @@ openstack_quotas:
 
 '''
 
-from ansible.module_utils.basic import AnsibleModule
+import traceback
+
+KEYSTONEAUTH1_IMP_ERR = None
+try:
+    from keystoneauth1 import exceptions as ksa_exceptions
+    HAS_KEYSTONEAUTH1 = True
+except ImportError:
+    KEYSTONEAUTH1_IMP_ERR = traceback.format_exc()
+    HAS_KEYSTONEAUTH1 = False
+
+from ansible.module_utils.basic import AnsibleModule, missing_required_lib
 from ansible.module_utils.openstack import openstack_full_argument_spec, openstack_module_kwargs, openstack_cloud_from_module
 
 
@@ -249,12 +260,12 @@ def _get_quotas(sdk, module, cloud, project):
     quota = {}
     try:
         quota['volume'] = _get_volume_quotas(cloud, project)
-    except sdk.exceptions.NotFoundException:
+    except ksa_exceptions.EndpointNotFound:
         module.warn("No public endpoint for volumev2 service was found. Ignoring volume quotas.")
 
     try:
         quota['network'] = _get_network_quotas(cloud, project)
-    except sdk.exceptions.NotFoundException:
+    except ksa_exceptions.EndpointNotFound:
         module.warn("No public endpoint for network service was found. Ignoring network quotas.")
 
     quota['compute'] = _get_compute_quotas(cloud, project)
@@ -364,6 +375,9 @@ def main():
                            supports_check_mode=True
                            )
 
+    if not HAS_KEYSTONEAUTH1:
+        module.fail_json(msg=missing_required_lib("keystoneauth1"), exception=KEYSTONEAUTH1_IMP_ERR)
+
     sdk, cloud = openstack_cloud_from_module(module)
     try:
         cloud_params = dict(module.params)