Re: [ovirt-users] Upgrade datacenter from 3.6 to 4.0

2016-08-26 Thread Arnaud Lauriou
Upgrade done. In my case, the engine was already updated to the latest 4.x release before the hosts. Following marks 1 and 2 works fine. After upgrading the cluster compatibility version, got message to reboot all the VMs. Don't know if I really have to do that. On 08/23/2016 02:28 PM, Barak

Re: [ovirt-users] Upgrade datacenter from 3.6 to 4.0

2016-08-24 Thread Michal Skrivanek
> On 24 Aug 2016, at 05:09, Barak Korren wrote: > > > > On 23 August 2016 at 19:09, Christophe TREFOIS > wrote: > Small add. > > Shouldnt one update the engine first ? > > Nope. > You should always update

Re: [ovirt-users] Upgrade datacenter from 3.6 to 4.0

2016-08-24 Thread Dan Yasny
Doesn't it make more sense for this major upgrade to be a simple new install of engine v4, and importing the existing SDs? On Wed, Aug 24, 2016 at 6:34 AM, Barak Korren wrote: > > > On 24 August 2016 at 12:32, Christophe TREFOIS > wrote: > >>

Re: [ovirt-users] Upgrade datacenter from 3.6 to 4.0

2016-08-24 Thread Barak Korren
On 24 August 2016 at 12:32, Christophe TREFOIS wrote: > Really? That’s strange, as the engine should be backward compatible with > previous versions no? > > Think about it like this - When an update comes out it gets pushed to the repos/channels. If you then go and

Re: [ovirt-users] Upgrade datacenter from 3.6 to 4.0

2016-08-24 Thread Christophe TREFOIS
Really? That’s strange, as the engine should be backward compatible with previous versions no? Anyway, I believe the devs :) -- Dr Christophe Trefois, Dipl.-Ing. Technical Specialist / Post-Doc UNIVERSITÉ DU LUXEMBOURG LUXEMBOURG CENTRE FOR SYSTEMS BIOMEDICINE Campus Belval | House of

Re: [ovirt-users] Upgrade datacenter from 3.6 to 4.0

2016-08-24 Thread Barak Korren
On 23 August 2016 at 19:09, Christophe TREFOIS wrote: > Small add. > > Shouldnt one update the engine first ? > Nope. You should always update the hosts first. The other way around can work but AFAIK this is what is being tested. -- *Barak Korren*

Re: [ovirt-users] Upgrade datacenter from 3.6 to 4.0

2016-08-23 Thread Christophe TREFOIS
Small add. Shouldnt one update the engine first ? -- Dr Christophe Trefois, Dipl.-Ing. Technical Specialist / Post-Doc UNIVERSITÉ DU LUXEMBOURG LUXEMBOURG CENTRE FOR SYSTEMS BIOMEDICINE Campus Belval | House of Biomedicine 6, avenue du Swing L-4367 Belvaux T: +352 46 66 44 6124 F: +352 46 66

Re: [ovirt-users] Upgrade datacenter from 3.6 to 4.0

2016-08-23 Thread Barak Korren
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.

[ovirt-users] Upgrade datacenter from 3.6 to 4.0

2016-08-23 Thread Arnaud Lauriou
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