Good news. Finally I was able to deploy my ovirt engine under nested kvm
virtualisation. What I did was I spin up a fresh vm, added the ovirt repo and use cockpit
to deploy instead of command-line.
I know it sounded silly, but I believe my previous installation failed due to I took
out the default eth0 from Network Manager's control.
Now I'm trying to add in another ovirt host through the ovirt engine GUI.