A wrap up on the status of TripleO's Cinder HA spec. First, a link to the cinder-ha blueprint, where you can find even more links, to the actual spec (under review) and the code changes (again, still under review). Intent of the blueprint is for the TripleO deployments to keep Cinder volumes available and Cinder operational in case of failures of any node.
This said, should $subject sound interesting to you, beware the code still …