Hi, you are right. I don’t see any drawback, it is working good. Also you can manage resource inside VMs by pacemaker remote.
In opennebula itself, I can see VMs on Wild tab in Host detail. Thats all.
When I need to do maintanace, I just put node to standby like before. Pacemaker automatically migrate running VM to other node.
I think that is better that self-managing openenbula VMs by opennebula.
Actually, I have just one opennebula VM, but I planning to do MariaDB cluster from three VMs and them add second VM for openenbula. All managed by pacemaker and pacemaker remote.