12:41 p.m.
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Hi all,
I'm about to update to 3.4.4 with the associated vdsm. Updating vdsm
with yum is trivial, but it usually breaks running vms on the host.
So these are the steps I follow each time:
* live migrating runnings vms to a another host in the cluster
* putting the host in maintenance
* updating vdsm
* activating the host
* getting back the vms
* and so on with the other hosts...
But sometimes it is not enough, I need to reinstall the host so as to
the host be able to successfully activate.
When getting back the vms on the initial host, I must do it manually to
load balance vms between the hosts and this is not very convinient.
So my question is : do I update in the right way, or is there any
recommendations that I didn't find anyway?
Thanks.
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Hi all,<br>
<br>
I'm about to update to 3.4.4 with the associated vdsm. Updating vdsm
with yum is trivial, but it usually breaks running vms on the host.<br>
So these are the steps I follow each time:<br>
<ul>
<li>live migrating runnings vms to a another host in the cluster</li>
<li>putting the host in maintenance</li>
<li>updating vdsm</li>
<li>activating the host</li>
<li>getting back the vms</li>
<li>and so on with the other hosts...<br>
</li>
</ul>
<p>But sometimes it is not enough, I need to reinstall the host so
as to the host be able to successfully activate.<br>
</p>
<p>When getting back the vms on the initial host, I must do it
manually to load balance vms between the hosts and this is not
very convinient.<br>
</p>
<p>So my question is : do I update in the right way, or is there any
recommendations that I didn't find anyway?<br>
</p>
<p>Thanks.<br>
</p>
</body>
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2:30 p.m.
Hello Nathanaël,
I think the supposed way to upgrade would be:
* (hosted-engine only) put cluster in global maintenance if running
hosted-enfgine
* upgrade Engine using engine-setup (this *should* detect product updates)
* (hosted-engine only) disable global maintenance
* Put host in maintenance mode (witch will migrate VMs automatically)
* Click 'reinstall host' in Engine (this step will will invoke yum update?)
* Activate host
continue with the other hosts
If there are kernel updates, I usually update them as well in the
process (involving manual yum).
Can anyone clarify if 'reinstall host' invokes yum? Thanks!
On 24.09.2014 11:41, Nathanaël Blanchet wrote:
Hi all,
I'm about to update to 3.4.4 with the associated vdsm. Updating vdsm with yum is
trivial, but it usually breaks running vms on the host.
So these are the steps I follow each time:
* live migrating runnings vms to a another host in the cluster
* putting the host in maintenance
* updating vdsm
* activating the host
* getting back the vms
* and so on with the other hosts...
But sometimes it is not enough, I need to reinstall the host so as to the host
be able to successfully activate.
When getting back the vms on the initial host, I must do it manually to load
balance vms between the hosts and this is not very convinient.
So my question is : do I update in the right way, or is there any
recommendations that I didn't find anyway?
Thanks.
--
Daniel Helgenberger
m box bewegtbild GmbH
P: +49/30/2408781-22
F: +49/30/2408781-10
ACKERSTR. 19
D-10115 BERLIN
www.m-box.de www.monkeymen.tv
Geschäftsführer: Martin Retschitzegger / Michaela Göllner
Handeslregister: Amtsgericht Charlottenburg / HRB 112767
4:44 p.m.
Replying to my own mail since upgrading opportunities are not many.
Considering the procdure mentioned worked very well, it needs some
refinement.
On 24.09.2014 13:30, Daniel Helgenberger wrote:
Hello Nathanaël,
I think the supposed way to upgrade would be:
Here you need to insert:
# yum update engine-setup on the engine
(and for a new major version also new .repo files)
this is necessary since the engine-setup utility cannot upgrade itself
(though this might be doable; RFE? :)
* (hosted-engine only) put cluster in global maintenance if running
hosted-enfgine
* upgrade Engine using engine-setup (this *should* detect product updates)
* (hosted-engine only) disable global maintenance
* Put host in maintenance mode (witch will migrate VMs automatically)
This did not
work for the hosted engine VM for some reason; I migrated
it manually. Is this intentional?
* Click 'reinstall host' in Engine (this step will will
invoke yum update?)
* Activate host
continue with the other hosts
If there are kernel updates, I usually update them as well in the
process (involving manual yum).
Can anyone clarify if 'reinstall host' invokes yum? Thanks!
It will run yum
update; but only on oVirt packages. One might want to
run it again to update all other system packages. Again, this makes sense.
On 24.09.2014 11:41, Nathanaël Blanchet wrote:
> Hi all,
>
> I'm about to update to 3.4.4 with the associated vdsm. Updating vdsm with yum is
> trivial, but it usually breaks running vms on the host.
> So these are the steps I follow each time:
>
> * live migrating runnings vms to a another host in the cluster
> * putting the host in maintenance
> * updating vdsm
> * activating the host
> * getting back the vms
> * and so on with the other hosts...
>
> But sometimes it is not enough, I need to reinstall the host so as to the host
> be able to successfully activate.
>
> When getting back the vms on the initial host, I must do it manually to load
> balance vms between the hosts and this is not very convinient.
>
> So my question is : do I update in the right way, or is there any
> recommendations that I didn't find anyway?
>
> Thanks.
>
--
Daniel Helgenberger
m box bewegtbild GmbH
P: +49/30/2408781-22
F: +49/30/2408781-10
ACKERSTR. 19
D-10115 BERLIN
www.m-box.de www.monkeymen.tv
Geschäftsführer: Martin Retschitzegger / Michaela Göllner
Handeslregister: Amtsgericht Charlottenburg / HRB 112767
5 p.m.
On Wed, Sep 24, 2014 at 11:30:03AM +0000, Daniel Helgenberger wrote:
Hello Nathanaël,
I think the supposed way to upgrade would be:
* (hosted-engine only) put cluster in global maintenance if running
hosted-enfgine
* upgrade Engine using engine-setup (this *should* detect product updates)
* (hosted-engine only) disable global maintenance
* Put host in maintenance mode (witch will migrate VMs automatically)
* Click 'reinstall host' in Engine (this step will will invoke yum update?)
* Activate host
continue with the other hosts
If there are kernel updates, I usually update them as well in the
process (involving manual yum).
Can anyone clarify if 'reinstall host' invokes yum? Thanks!
On 24.09.2014 11:41, Nathanaël Blanchet wrote:
> Hi all,
>
> I'm about to update to 3.4.4 with the associated vdsm. Updating vdsm with yum is
> trivial, but it usually breaks running vms on the host.
> So these are the steps I follow each time:
>
> * live migrating runnings vms to a another host in the cluster
> * putting the host in maintenance
> * updating vdsm
> * activating the host
That's the prudent thing to do, but `yum upgrade vdsm` should NOT "break
vms". When it does, I'd love to see a bug report (VMs being temporarily
paused due to lost storage is expected).
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participants (3)
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Dan Kenigsberg -
Daniel Helgenberger -
Nathanaël Blanchet