Comment 1 for bug 1747904

Yes - this is absolutely a bug. The underlying issue is that while we create proxy objects for each official type and then also add them to the connection for every alias so that both:

  conn.messaging.messages()

and

  conn.message.messages()

work ... the creation of the keystoneauth Adapter object is not honoring finding services by alias in the catalog.

https://review.openstack.org/#/c/544356/ should address this, although it needs a few more hours work before it'll be ready to land. Ultimately, that patch should be considered a workaround, and the actual place this should be solved is in keystoneauth ... https://review.openstack.org/#/c/484341/ is a patch that does that which needs to be re-done. However, this fix needs to be put in place and then backported to stable/queens in SDK since we can't get it fixed in keystoneauth for queens (is a new ksa feature)