The RHOSO Block Storage service supports the Generic Volume Group APIs since the previous Consistency Group APIs have been deprecated since the Queens release. Having discussed this issue with Eric, the generic group APIs provides coverage for both generic (non-consistent)  and consistency volume groups.

All the openstack volume group commands need to be documented.

When documenting these commands, it may make sense to group all the consistency volume group commands together under the Consistency volume groups heading, since this is what the OSP 17.1 users are familar with already and then to group the non-consistent group functionality under another heading, perhaps Generic volume groups or Non-consistent volume groups for cinder.

This is the upstream documentation for the generic volume groups: https://docs.openstack.org/cinder/latest/admin/groups.html