Having problems updating some of your oVirt nodes? Chances are you might have a var_crash volume you need to manually remove and/or ran out of space on your PV/VG if you are running rather small disks on your node.
For a quick fix, SSH into your node and run those:
/ .0 lvremove /dev/ / .0+1 lvremove /dev/ /var_crash fstrim -av
To upgrade your image, then run
yum update ovirt-node-ng-image-update
Reboot your node and run an upgrade via the engine webinterface once again to make sure you’re now on the latest release.