On Monday, February 15, 2016 08:21:40 PM Johan Kooijman wrote:
Hi Alexander,
Thanks for the input! My 3.5 is running on C6 however:
Upgrade of All-in-One on EL6 is not supported in 3.6. VDSM and the packages
requiring it are not built anymore for EL6
Well that was a piece of information you forgot to mention in your initial
email. So now I am not entirely sure what you are trying to do. Are you trying
to save your existing VMs when you reinstall your machine?
On Mon, Feb 15, 2016 at 3:37 PM, Alexander Wels
<awels(a)redhat.com> wrote:
> On Monday, February 15, 2016 02:40:47 PM Johan Kooijman wrote:
> > Hi,
> >
> > Can anybody recommend me best practice upgrade path for an upgrade from
> > oVirt 3.5 on C6 to 3.6 on C7.2?
>
> The answer sort of depends on what you want. Do you want no downtime on
> your
> VMs or is downtime acceptable. Also are you running hosted engine or not?
>
> This is the basic plan which can be adjusted based on what your needs are:
>
> 1. Update engine from 3.5 to 3.6 (if hosted engine might be trickier, not
> sure
> haven't played with hosted engine).
> 2. Create a new 3.6 cluster.
> 3. Put 1 host in maintenance (which will migrate the VMs to the other
> hosts).
> 4. Remove the host from the DC.
> 5. Install C7.2 on the host
> 6. Add that host to the new 3.6 cluster.
> 7. Optional (you can cross cluster live migrate some VMs from 6 to 7 (just
> not
> the other way around, so once the VM is moved its stuck in the new
> cluster).
> 8. Go to 3 until all hosts are moved.
> 9. Your 3.5 cluster should now be empty, and can be removed.
> 10. Upgrade your DC to 3.6 (Can't upgrade if any lower clusters exist).
>
> If you can have downtime, then just shut down the VMs running on the host
> in
> step 3 before putting it in maintenance. Once the host is moved to the new
> cluster you can start the VMs.
>
> Alexander
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