On Thu, Jul 14, 2016 at 10:38 AM, Demeter Tibor <tdeme...@itsmart.hu> wrote: > > Dear members! > > We have an ovirt cluster that based on el6 and 3.5.6 > It is contain three nodes, but the first node is an all-in-one installation. > I would like to upgrade the whole system to 4.0. Also I would like to switch > to hosted engine modell.
Sounds like a combination of: [1] http://www.ovirt.org/develop/developer-guide/engine/migrate-to-hosted-engine/ [2] https://www.ovirt.org/documentation/how-to/hosted-engine-host-OS-upgrade/ [3] https://www.ovirt.org/documentation/how-to/hosted-engine/#upgrade-hosted-engine > Now, we bought new servers for the migration. "For the migration", meaning you intend to eventually migrate to them? And decommission the existing ones? Also, I assume you want el7 on all hosts eventually. Storage remains as-is? How important is no downtime for the VMs? > > What is the good way to migrate nodes, etc? Something like: 1. Create new storage space for the hosted-engine 2. Install el7 on one of the new hosts, NH1 3. deploy hosted-engine on NH1 Follow [1]: - backup existing engine and stop/disable engine there - restore backup on the engine vm (after you install engine, but do not engine-setup) - engine-setup - When 'hosted-engine --deploy' will try to add the host to the engine, it might fail, because it will add it to Default cluster, which has el6 hosts. Check [2] about this - create new cluster and add there. - All of the above in 3.5. 4. Perhaps add the other new hosts, perhaps as hosted-engine hosts - if you want HA for the engine vm 5. Migrate all VMs to the new cluster. 6. Delete old hosts 7. Upgrade to 3.6 - check [2] 8. Upgrade to 4.0 - should be normal procedure [3] I recommend testing this on test systems prior to prod. You can use nested kvm for this. Best, -- Didi _______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users