Openstack Victoria/Xena: nova-scheduler fails to start, no supported versions for keystone.internal

[Alexander Balderson]

SQA has found that tests running Openstack Xena are failing with the nova-cloud-controller charm failing to start the nova-conductor service on 2 of the 3 units.

The nova-conductor log shows that the placement-service for the keystone-internal hostname eixsts but doesnt have supported versions:

2022-03-15 15:35:45.096 190722 WARNING keystoneauth.discover [-] Failed to contact the endpoint at http://placement-internal.silo1.solutionsqa:8778 for discovery. Fallback to using that endpoint as the base url.
2022-03-15 15:35:45.099 190722 WARNING keystoneauth.discover [-] Failed to contact the endpoint at http://placement-internal.silo1.solutionsqa:8778 for discovery. Fallback to using that endpoint as the base url.
2022-03-15 15:35:45.099 190722 CRITICAL nova [-] Unhandled error: openstack.exceptions.NotSupported: The placement service for keystone-internal.silo1.solutionsqa:RegionOne exists but does not have any supported versions.
2022-03-15 15:35:45.099 190722 ERROR nova Traceback (most recent call last):
2022-03-15 15:35:45.099 190722 ERROR nova File "/usr/bin/nova-conductor", line 10, in <module>
2022-03-15 15:35:45.099 190722 ERROR nova sys.exit(main())
2022-03-15 15:35:45.099 190722 ERROR nova File "/usr/lib/python3/dist-packages/nova/cmd/conductor.py", line 45, in main
2022-03-15 15:35:45.099 190722 ERROR nova server = service.Service.create(binary='nova-conductor',
2022-03-15 15:35:45.099 190722 ERROR nova File "/usr/lib/python3/dist-packages/nova/service.py", line 252, in create
2022-03-15 15:35:45.099 190722 ERROR nova service_obj = cls(host, binary, topic, manager,
2022-03-15 15:35:45.099 190722 ERROR nova File "/usr/lib/python3/dist-packages/nova/service.py", line 116, in __init__
2022-03-15 15:35:45.099 190722 ERROR nova self.manager = manager_class(host=self.host, *args, **kwargs)
2022-03-15 15:35:45.099 190722 ERROR nova File "/usr/lib/python3/dist-packages/nova/conductor/manager.py", line 119, in __init__
2022-03-15 15:35:45.099 190722 ERROR nova self.compute_task_mgr = ComputeTaskManager()
2022-03-15 15:35:45.099 190722 ERROR nova File "/usr/lib/python3/dist-packages/nova/conductor/manager.py", line 244, in __init__
2022-03-15 15:35:45.099 190722 ERROR nova self.report_client = report.SchedulerReportClient()
2022-03-15 15:35:45.099 190722 ERROR nova File "/usr/lib/python3/dist-packages/nova/scheduler/client/report.py", line 187, in __init__
2022-03-15 15:35:45.099 190722 ERROR nova self._client = self._create_client()
2022-03-15 15:35:45.099 190722 ERROR nova File "/usr/lib/python3/dist-packages/nova/scheduler/client/report.py", line 230, in _create_client
2022-03-15 15:35:45.099 190722 ERROR nova client = self._adapter or utils.get_sdk_adapter('placement')
2022-03-15 15:35:45.099 190722 ERROR nova File "/usr/lib/python3/dist-packages/nova/utils.py", line 983, in get_sdk_adapter
2022-03-15 15:35:45.099 190722 ERROR nova return getattr(conn, service_type)
2022-03-15 15:35:45.099 190722 ERROR nova File "/usr/lib/python3/dist-packages/openstack/service_description.py", line 87, in __get__
2022-03-15 15:35:45.099 190722 ERROR nova proxy = self._make_proxy(instance)
2022-03-15 15:35:45.099 190722 ERROR nova File "/usr/lib/python3/dist-packages/openstack/service_description.py", line 266, in _make_proxy
2022-03-15 15:35:45.099 190722 ERROR nova raise exceptions.NotSupported(
2022-03-15 15:35:45.099 190722 ERROR nova openstack.exceptions.NotSupported: The placement service for keystone-internal.silo1.solutionsqa:RegionOne exists but does not have any supported versions.
2022-03-15 15:35:45.099 190722 ERROR nova

All testruns with this bug can be found at:
https://solutions.qa.canonical.com/bugs/bugs/bug/1965152