Comment 2 for bug 1664650

So in terms of history, https://review.openstack.org/#/c/358511/ landed which was supposed to ensure minor updates didn't restart everything, only things which need it (which, for no-op updates should really be nothing?)

It sounds like we need to reproduce and check logs to see what actually does get restarted (e.g do pacemaker managed services actually still get restarted, causing errors in the API services which don't?)

Also we should look at adding some liveness checks to the update CI job, so we can ensure the APIs really do stay up during minor updates.