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!