As for cinder-volume-usage-audit would it be ill-advised to just always run it? It seems like a fairly low-touch action since it runs every 5 minutes. If so we could just add this to the cinder charm natively and not have to worry about extra relations, config and subordinates.
If i'm not mistaken the following simple change to cinder.conf does the trick:
[oslo_messaging _notifications]
driver = messagingv2
As for cinder- volume- usage-audit would it be ill-advised to just always run it? It seems like a fairly low-touch action since it runs every 5 minutes. If so we could just add this to the cinder charm natively and not have to worry about extra relations, config and subordinates.