OpenShift on OpenStack deploys Control Plane servers as Nova instances grouped toghether in a server group with soft-anti-affinity policy. The problem is that during installation, an additional server group is created. It is not used (hence no impact on functionality), but it impacts on quota utilisation. It is correctly garbage-collected on cluster teardown.
Verified on 4.5.0-0.nightly-2020-04-02-104742 Only one server group is created
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-2020:2409