Database Upgrade from 6.0.0 to 6.2.0

I am wondering if I can upgrade the database and OpenNebula on my front-end to 6.2.0 but leave my storage/virtualization hosts on 6.0.0 for a couple days before upgrading. I don’t know if there are any compatibility problems between the front-end and the hosts in the cluster.

If there are, I’m guessing best practice would to migrate all VMs off of a certain host(s), upgrade to newest version and then migrate VMs back? Then repeat with the rest of the nodes?

Any insight would be greatly appreciated as I will be doing this again from 6.2.0 to 6.4.0!

Hi @alex.shulta :wave:

We always recommend upgrading Frontend and hypervisors at the same time following the procedures described here.

Leaving hosts and frontend in different versions can produce unsuspected scenarios and behaviors. Since the monitoring probes and other scripts used by OpenNebula differ between versions.