Make sure you get the last version of the container images, to make sure you have the last one you should see the following message from the docker logs command after a container restart:
Trying to get the most recent monmap...
As discussed yesterday, this is normal. One of the monitor is outside quorum and thus has a different knowledge of what's going on in the cluster.
When calling the Ceph CLI you randomly go through the list of monitors, hitting the ones in quorum and the one outside the quorum.
Verified with version - ceph-2-rhel-7-docker-candidate-20170516014056
mon is restarted after reboot and no split brain was observed, hence moving to verified
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://access.redhat.com/errata/RHEA-2017:1498