Users: I suggest to upgrade in order to get latest features, fixes and security fixes. Just a note for ppc64le users, there's a known bug with libguestfs requiring qemu-kvm-ma instead of qemu-kvm that may cause upgrade issues. This should be fixed in next update which should land in CentOS in ~2 weeks.

If you are still on 4.1, please change your centos repos to point to http://mirror.centos.org/centos/7.4.1708/ instead of http://mirror.centos.org/centos/7.

Then please update to latest 4.1 and then to oVirt 4.2 + CentOS 7.5 as soon as you can.

Devel: please cross check your jenkins jobs, especially those having to do something with 4.1 since CentOS 7.5 is not supporting oVirt 4.1 anymore. See above.

Infra: please schedule a mass update of oVirt infrastructure to CentOS 7.5 + oVirt 4.2.3 ASAP.

Thanks,