[ovirt-users] Upgrade datacenter from 3.6 to 4.0

[Christophe TREFOIS]

Small add.

Shouldnt one update the engine first ?

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Dr Christophe Trefois, Dipl.-Ing.
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On 23 Aug 2016, at 14:28, Barak Korren <bkorren at redhat.com<mailto:bkorren at redhat.com>> wrote:


The following process worked for me:
1. ensure all hosts are running el7 or above, and all clusters had been upgraded to 3.6 level
2. upgrade vdsm to 4.x on all hosts (assuming you are not using ovirt-node) by switching to maintainance upgrading and activating one by one to avoid VM downtime.
3. Upgrade engine by following one of the documented procedures (we just inatalled a new machine for it and switched DNS after backup/restore).
4. Once satisfied that illing back to 3.6 engine will not be needed - upgrade cluster level.

בתאריך 23 באוג׳ 2016 12:43,‏ "Arnaud Lauriou" <arnaud.lauriou at irisa.fr<mailto:arnaud.lauriou at irisa.fr>> כתב:
Hi,

What is the best way to upgrade a datacenter from ovirt 3.6 to 4.0 ?
Upgrade engine, hosts then cluster ?
If right, how do you upgrade a host running ovirt 3.6.7 ? Simple upgrade or fresh install ?
During the update process of a cluster, some hosts will be in 3.6.7 and others in 4.0.2, is it a problem for migrating VMs ?

Found docs about engine upgrade but not a lot about host and cluster.

Thanks,

Arnaud
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