InstanceLocality filter use result in AttributeError: 'Client' object has no attribute 'list_extensions'

[György Szombathelyi]

Using InstanceLocality filter result in an exception when cinder tries to figure out the supported nova extensions:
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2021-11-08 08:48:01.514 3120 ERROR oslo_messaging.rpc.server File "/usr/lib/python3/dist-packages/cinder/scheduler/filters/instance_locality_filter.py", line 98, in backend_passes
2021-11-08 08:48:01.514 3120 ERROR oslo_messaging.rpc.server if not self._nova_has_extended_server_attributes(context):
2021-11-08 08:48:01.514 3120 ERROR oslo_messaging.rpc.server File "/usr/lib/python3/dist-packages/cinder/scheduler/filters/instance_locality_filter.py", line 67, in _nova_has_extended_server_attributes
2021-11-08 08:48:01.514 3120 ERROR oslo_messaging.rpc.server self._nova_ext_srv_attr = nova.API().has_extension(
2021-11-08 08:48:01.514 3120 ERROR oslo_messaging.rpc.server File "/usr/lib/python3/dist-packages/cinder/compute/nova.py", line 178, in has_extension
2021-11-08 08:48:01.514 3120 ERROR oslo_messaging.rpc.server nova_exts = novaclient(context).list_extensions.show_all()
2021-11-08 08:48:01.514 3120 ERROR oslo_messaging.rpc.server AttributeError: 'Client' object has no attribute 'list_extensions'

Something has changed in novaclient?

[Sofia Enriquez (lsofia-enriquez)]

Greetings György Szombathelyi
> Something has changed in novaclient?
I did a quick search and the only cinder changes related to this are from queens (~2017).
I think the quickest way to find out is for you to contact the nova team on IRC.
If you are still interested in this bug, please provide the next information:
- cinder version
- steps to reproduce this.
- cinder driver
- The logs you proved are from c-vol?
Thanks in advance
Sofia