Comment 2 for bug 1464160

The only fix is on the server side with the public_endpoint configuration option.

http://docs.openstack.org/kilo/config-reference/content/cinder-conf-changes-kilo.html

Unfortunately that option has only been available since Kilo, and I don't expect a lot clouds to be up that version yet. The version discovery addition to Cinder client was premature in my opinion.