I just enabled the Gluster service in an existing oVirt 7.2.7-1 cluster via the Web-UI which put all hosts into non-operational status.

Lots of events being created:

Could not find gluster uuid of server host001.local on Cluster testlab.

Could not find gluster uuid of server host002.local on Cluster testlab.

Could not find gluster uuid of server host003.local on Cluster testlab.

and a bunch of failed vm migrations

Is it possible to add glusterfs after ovirt has been installed and configured?