[ovirt-users] Ovirt-3.4.1: How to: Upgrading Hosted Engine Cluster
dfediuck at redhat.com
Sat May 10 07:31:16 UTC 2014
----- Original Message -----
> From: "Doron Fediuck" <dfediuck at redhat.com>
> To: "Daniel Helgenberger" <daniel.helgenberger at m-box.de>
> Cc: users at ovirt.org
> Sent: Saturday, May 10, 2014 9:47:29 AM
> Subject: Re: [ovirt-users] Ovirt-3.4.1: How to: Upgrading Hosted Engine Cluster
> ----- Original Message -----
> > From: "Daniel Helgenberger" <daniel.helgenberger at m-box.de>
> > To: users at ovirt.org
> > Sent: Friday, May 9, 2014 6:45:36 PM
> > Subject: [ovirt-users] Ovirt-3.4.1: How to: Upgrading Hosted Engine Cluster
> > Hello,
> > failing to find a procedure how to actually upgrade a HA cluster, I did
> > the following witch turned out to be working pretty well.
> > I am somewhat new to oVirt and was amazed how well actually; I did not
> > need to shutdown a single VM (well, one because of mem usage; many of my
> > running VMs have fancy stuff like iscsi and FC luns via a Quantum
> > Stornext HA Cluster):
> > 1. Set cluster to global maintance
> > 2. Login to ovit engine and to the upgrade according to the release
> > nodes.
> > 3. After the upgrade is finished and the engine running, set the
> > first Node in local maintenance.
> > 4. Login the first node and yum update (with the removal of
> > ovirt-release as mentioned in release notes).* I rebooted the
> > node because of the kernel update.
> > 5. Return to oVirt and reinstall the Node from GUI, it will be set
> > to operational automatically**
> > 6. Repeat steps 3-6 for the rest of the Nodes.
> > 7. Remove global maintenance.
> > 8. Update the last Node.***
> > * I first tried to do this with re-install from GUI. This failed; so I
> > used the yum - update method to update all relevant services
> > ** I do not know if this was necessary. I did this because the
> > hosted-engine --deploy does the same thing when adding a host.
> > *** I found this to be necessary because I had all my Nodes in local
> > maintenance and could not migrate the Hosted engine from the last node
> > any more. The host activation in oVirt did not remove the local
> > maintenance set prior to the update (witch it should, IMHO). It might be
> > desirable to have a hosted-engine command option to remove local
> > maintenance for that reason.
> > --
> > 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
> Hi Martin,
> Thanks for sharing!
> A few notes on your nice 8 steps ;)
> - There are 2 maintenance modes to cover host maintenance (local) and
> VM maintenance (global). Global maintenance disarms all HA hosts in
> the cluster, so use it with caution as there's no fail over in this
> - Initially these were available only as a command line. Since 3.4.0,
> this was integrated into the UI, so all you need to do is move a host
> to maintenance in order to achieve local maintenance, and activate it
> to remove the maintenance mode. For global maintenance, right click
> the engine VM, and you will see enable/disable ha-maintenance for
> the global mode.
> - No need to re-install nodes. All you need to do is activate it.
> - Basically a standard procedure should include:
> * Move host to maintenance, login and update the host, activate the host.
> * Follow the above for all other HA hosts
> * Set the engine VM to ha maintenance (global), login to the vm and
> upgrade it, unset vm's ha-maintenance.
> Appreciate your feedback.
> Also, were you aware of  or did you look for info elsewhere? I'd like
> to know what we can do to improve documentation.
> Thanks again,
>  http://www.ovirt.org/Hosted_Engine_Howto#Maintaining_the_setup
My apologies- s/Martin/Daniel.
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