We have tried patching the charm in live environment, i.e. by replacing 'volume_type' with volume_type, but it looks like there's something else missing still.

With patched glance charm, `glance image-create` fails as follows:

```
$ glance image-create  --store volume-type-1 --file ./cirros-0.5.1-x86_64-disk.img --container-format bare --disk-format qcow2
HTTP 503 Service Unavailable: Service Unavailable: The server is temporarily unable to service your: request due to maintenance downtime or capacity: problems. Please try again later.: Apache/2.4.52 (Ubuntu) Server at image.example.com Port 9292
```

glance-api.conf seem to be configured correctly:
```
...

[volume-type-1]
cinder_volume_type = volume-type-1
cinder_http_retries = 3
cinder_state_transition_timeout = 30
cinder_catalog_info = volumev3:cinderv3:internalURL

[volume-type-2]
cinder_volume_type = volume-type-2
cinder_http_retries = 3
cinder_state_transition_timeout = 30
cinder_catalog_info = volumev3:cinderv3:internalURL
```



Glance log shows the following DEBUG messages, I'm not sure if this is relevant though:

```
2024-02-12 10:20:31.173 2512343 DEBUG glance_store.multi_backend [-] Attempting to import store file _load_multi_store /usr/lib/python3/dist-packages/glance_store/multi_backend.py:171
2024-02-12 10:20:31.174 2512343 DEBUG glance_store.capabilities [-] Store glance_store._drivers.filesystem.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/dist-packages/glance_store/capabilities.py:91
2024-02-12 10:20:31.174 2512343 DEBUG glance_store.multi_backend [-] Registering store file with schemes ('file', 'filesystem') create_multi_stores /usr/lib/python3/dist-packages/glance_store/multi_backend.py:304
2024-02-12 10:20:31.175 2512343 DEBUG glance_store.driver [-] Late loading location class glance_store._drivers.filesystem.StoreLocation get_store_location_class /usr/lib/python3/dist-packages/glance_store/driver.py:117
2024-02-12 10:20:31.175 2512343 DEBUG glance_store.location [-] Registering scheme file with {'local': {'store': <glance_store._drivers.filesystem.Store object at 0x7f0e86c797b0>, 'location_class': <class 'glance_store._drivers.filesystem.StoreLocation'>, 'store_entry': 'file'}} register_scheme_backend_map /usr/lib/python3/dist-packages/glance_store/location.py:132
2024-02-12 10:20:31.175 2512343 DEBUG glance_store.location [-] Registering scheme file with {'local': {'store': <glance_store._drivers.filesystem.Store object at 0x7f0e86c797b0>, 'location_class': <class 'glance_store._drivers.filesystem.StoreLocation'>, 'store_entry': 'file'}} register_scheme_backend_map /usr/lib/python3/dist-packages/glance_store/location.py:132
2024-02-12 10:20:31.175 2512343 DEBUG glance_store.location [-] Registering scheme filesystem with {'local': {'store': <glance_store._drivers.filesystem.Store object at 0x7f0e86c797b0>, 'location_class': <class 'glance_store._drivers.filesystem.StoreLocation'>, 'store_entry': 'file'}} register_scheme_backend_map /usr/lib/python3/dist-packages/glance_store/location.py:132
2024-02-12 10:20:31.175 2512343 DEBUG glance_store.multi_backend [-] Attempting to import store cinder _load_multi_store /usr/lib/python3/dist-packages/glance_store/multi_backend.py:171
2024-02-12 10:20:31.176 2512343 DEBUG glance_store.common.fs_mount [-] Initialising _HostMountState __init__ /usr/lib/python3/dist-packages/glance_store/common/fs_mount.py:84
2024-02-12 10:20:31.177 2512343 DEBUG glance_store.capabilities [-] Store glance_store._drivers.cinder.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/dist-packages/glance_store/capabilities.py:91
```

I also noticed that these log entries started to appear in Glance log more or less every second, only after the charm was patched:
```
2024-02-12 10:18:20.644 2472552 INFO glance.async_ [-] Threadpool model set to 'EventletThreadPoolModel'
2024-02-12 10:18:21.423 2472552 INFO glance.image_cache [-] Image cache loaded driver 'sqlite'.
2024-02-12 10:18:21.433 2472552 WARNING keystonemiddleware.auth_token [-] AuthToken middleware is set with keystone_authtoken.service_token_roles_required set to False. This is backwards compatible but deprecated behaviour. Please set this to True.
```