https://github.com/openshift/ose/pull/750
Tested OCP v3.4.1.30 with openshift-on-openstack. Restart both master and node VMs for several times, the nodes' cluster ip will not flip flop. Verify the bug.
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/RHBA-2017:1425