We see errors with cinder talking to the wrong region when configured in a multi-region environment because it reads the catalog data incorrectly. There are problems with the interaction between:

1. cinder and glance
2. cinder and swift (swift backup driver)
3. cinder and barbican (the migration code)

Details are in the attached document.

Note: This is a cinder bug - rather than a bug for cinder-operator, but I added here for tracking purposes. The upstream bug is : https://bugs.launchpad.net/cinder/+bug/2138405