If you can: restart your setup from scratch with at least 3 hosts. Really. If you
don't face harsh consequences for doing so. It isn't just worth the hassle and
pain. Use at least 3 hosts because: A node can corrupt due to many reasons. Natural
causes, self inflicted ones. A corrupt node can only recover through re-installation. This
is triggered by the engine with VMs safe on the other nodes. On a single node system how
can this be possible with only a corrupted node at hand? If you really can only stick to a
one host setup you could try Proxmox. They have a community edition.
For multi host setups choose oVirt. It is just great.