[ovirt-users] Upgrade patch 3.5 -> 3.6

Tue Feb 16 13:31:08 UTC 2016

On Tuesday, February 16, 2016 12:36:58 PM Johan Kooijman wrote:
> Ack, thx.
> 
> On Tue, Feb 16, 2016 at 11:46 AM, Yedidyah Bar David <didi at redhat.com>
> 
> wrote:
> > On Tue, Feb 16, 2016 at 11:58 AM, Johan Kooijman <mail at johankooijman.com>
> > 
> > wrote:
> > > Didi,
> > > 
> > > Ok, the piece of information on engine still supported on 3.6 was
> > 
> > unknown to
> > 
> > > me. Makes my job a lot easier.
> > > 
> > > What would be the recommended path: first upgrade the nodes to 3.6 and
> > 
> > then
> > 
> > > the engine? Or the other way around?
> > 
> > Generally speaking, first engine then nodes. I am pretty certain it's
> > documented
> > on the wiki, didn't check.
> > 

Basically follow what I wrote should do what you want. Then if you later want 
to upgrade the engine from EL6 to EL7 you should be able to make a backup of 
the engine with the engine-backup tool. Then install a fresh engine on EL7 and 
restore the backup with that tool. Your VMs won't be affected if the engine is 
gone for a little bit (well besides not being able to manage them during the 
change over).

But as Didi wrote, right now EL6 is still supported so you can simply upgrade 
to oVirt 3.6 on EL6.

> > > On Tue, Feb 16, 2016 at 8:45 AM, Yedidyah Bar David <didi at redhat.com>
> > 
> > wrote:
> > >> On Tue, Feb 16, 2016 at 9:30 AM, Johan Kooijman <mail at johankooijman.com
> > >> 
> > >> wrote:
> > >> > Yes. I pasted the information on AIO, that was wrong on my end. I
> > >> > have
> > >> > an
> > >> > engine running on dedicated hardware and about 20 nodes in this
> > 
> > cluster.
> > 
> > >> > I
> > >> > do like to upgrade without downtime :) I know how to achieve this on
> > 
> > the
> > 
> > >> > node-end, but since I have to go from C6 to C7, I wonder what the
> > >> > procedure
> > >> > would be for engine.
> > >> 
> > >> Please explain exactly what you are trying to do.
> > >> 
> > >> Note that engine is still supported on el6.
> > >> 
> > >> (new) Hosts are not.
> > >> 
> > >> all-in-one is running both together, thus is not supported on el6
> > 
> > either.
> > 
> > >> IIRC we do not have a tested procedure to upgrade the engine from C6 to
> > 
> > C7
> > 
> > >> yet, see also:
> > >> 
> > >> https://bugzilla.redhat.com/show_bug.cgi?id=1234257
> > >> https://bugzilla.redhat.com/show_bug.cgi?id=1285743
> > >> 
> > >> Best,
> > >> 
> > >> > On Mon, Feb 15, 2016 at 9:21 PM, Alexander Wels <awels at redhat.com>
> > >> > 
> > >> > wrote:
> > >> >> 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 at 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
> > >> >> > > _______________________________________________
> > >> >> > > Users mailing list
> > >> >> > > Users at ovirt.org
> > >> >> > > http://lists.ovirt.org/mailman/listinfo/users
> > >> > 
> > >> > --
> > >> > Met vriendelijke groeten / With kind regards,
> > >> > Johan Kooijman
> > >> > 
> > >> > _______________________________________________
> > >> > Users mailing list
> > >> > Users at ovirt.org
> > >> > http://lists.ovirt.org/mailman/listinfo/users
> > >> 
> > >> --
> > >> Didi
> > > 
> > > --
> > > Met vriendelijke groeten / With kind regards,
> > > Johan Kooijman
> > 
> > --
> > Didi