Comment 2 for bug 2034071

Another clue -

2023-09-03T16:01:30.409Z [glance-api] Traceback (most recent call last):
2023-09-03T16:01:30.409Z [glance-api] File "/usr/lib/python3/dist-packages/eventlet/greenpool.py", line 88, in _spawn_n_impl
2023-09-03T16:01:30.409Z [glance-api] func(*args, **kwargs)
2023-09-03T16:01:30.409Z [glance-api] File "/usr/lib/python3/dist-packages/glance/housekeeping.py", line 87, in clean_orphaned_staging_residue
2023-09-03T16:01:30.409Z [glance-api] files = os.listdir(staging_store_path())
2023-09-03T16:01:30.409Z [glance-api] PermissionError: [Errno 13] Permission denied: '/var/lib/glance/os_glance_staging_store'

that's thrown no startup of the service.