Comment 3 for bug 1940076

While digging a bit deeper in the logs, we can see glance is having a hard time:

At the end of the following log:
https://logserver.rdoproject.org/openstack-periodic-integration-stable4/opendev.org/openstack/tripleo-ci/master/periodic-tripleo-ci-centos-8-scenario001-standalone-train/1c1f56b/logs/undercloud/var/log/containers/glance/api.log.txt.gz

we can see this ERROR trace:

021-08-16 20:33:12.278 8 ERROR glance_store._drivers.rbd [-] Error connecting to ceph cluster.: rados.PermissionDeniedError: [errno 13] error connecting to the cluster
2021-08-16 20:33:12.278 8 ERROR glance_store._drivers.rbd Traceback (most recent call last):
2021-08-16 20:33:12.278 8 ERROR glance_store._drivers.rbd File "/usr/lib/python3.6/site-packages/glance_store/_drivers/rbd.py", line 273, in get_connection
2021-08-16 20:33:12.278 8 ERROR glance_store._drivers.rbd client.connect(timeout=self.connect_timeout)
2021-08-16 20:33:12.278 8 ERROR glance_store._drivers.rbd File "rados.pyx", line 925, in rados.Rados.connect
2021-08-16 20:33:12.278 8 ERROR glance_store._drivers.rbd rados.PermissionDeniedError: [errno 13] error connecting to the cluster
2021-08-16 20:33:12.278 8 ERROR glance_store._drivers.rbd
2021-08-16 20:33:12.280 8 DEBUG glance_store.capabilities [-] Store glance_store._drivers.rbd.Store doesn't support updating dynamic storage capabilities. Please overwrite 'update_capabilities' method of the store to implement updating logics if needed. update_capabilities /usr/lib/python3.6/site-packages/glance_store/capabilities.py:95