[ovirt-users] InClusterUpgrade Scheduling Policy

[Scott]

Hi Roman,

Thanks for the detailed steps.  I follow the idea you have outlined and I
think its easier than what I thought of (moving my self hosted engine back
to physical hardware, upgrading and moving it back to self hosted).  I will
give it a spin in my build RHEV cluster tomorrow and let you know how I get
on.

Thanks again,
Scott

On Thu, Jun 23, 2016 at 2:41 PM Roman Mohr <rmohr at redhat.com> wrote:

> Hi Scott,
>
> On Thu, Jun 23, 2016 at 8:54 PM, Scott <romracer at gmail.com> wrote:
> > Hello list,
> >
> > I'm trying to upgrade a self-hosted engine RHEV environment running
> 3.5/el6
> > to 3.6/el7.  I'm following the process outlined in these two documents:
> >
> >
> https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Virtualization/3.6/html/Self-Hosted_Engine_Guide/Upgrading_the_Self-Hosted_Engine_from_6_to_7.html
> > https://access.redhat.com/solutions/2300331
> >
> > The problem I'm having is I don't seem to be able to apply the
> > "InClusterUpgrade" policy (procedure 5.5, step 4).  I get the following
> > error:
> >
> > Can not start cluster upgrade mode, see below for details:
> > VM HostedEngine with id 5ca9cb38-82e5-4eea-8ff6-e2bc33598211 is
> configured
> > to be not migratable.
> >
> That is correct, only the he-agents on each host decide where the
> hosted engine VM can start
>
> > But the HostedEngine VM is not one I can edit due to being mid-upgrade.
> And
> > even if I could, the setting its complaining about can't be managed by
> the
> > engine (I tried in another RHEV instance).
> >
> Also true, it is very limited what you can currently do with the
> hosted engine VM.
>
>
> > Is this a bug?  What am I missing to be able to move on?  As it seems
> now,
> > the InClusterUpgrade scheduling policy is useless and can't actually be
> > used.
>
> That is indeed something the InClusterUpgrade does not take into
> consideration. I will file a bug report.
>
>  But what you can do is the following:
>
> You can create a temporary cluster, move one host and the hosted
> engine VM there, upgrade all hosts and then start the hosted-engine VM
> in the original cluster again.
>
> The detailed steps are:
>
> 1) Enter the global maintenance mode
> 2) Create a temporary cluster
> 3) Put one of the hosted engine hosts which does not currently host
> the engine into maintenance
> 4) Move this host to the temporary cluster
> 5) Stop the hosted-engine-vm with `hosted-engine --destroy-vm` (it
> should not come up again since you are in maintenance mode)
> 6) Start the hosted-egine-vm with `hosted-engine --start-vm` on the
> host in the temporary cluster
> 7) Now you can enable the InClusterUpgrade policy on your main cluster
> 7) Proceed with your main cluster like described in
>
> https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Virtualization/3.6/html/Self-Hosted_Engine_Guide/Upgrading_the_Self-Hosted_Engine_from_6_to_7.html
> 8) When all hosts are upgraded and InClusterUpgrade policy is disabled
> again, move the hosted-engine-vm back to the original cluster
> 9) Upgrade the last host
> 10) Migrate the last host back
> 11) Delete the temporary cluster
> 12) Deactivate maintenance mode
>
> Adding Sandro and Roy to keep me honest.
>
> Roman
>
> >
> > Thanks for any suggestions/help,
> > Scott
> >
> > _______________________________________________
> > Users mailing list
> > Users at ovirt.org
> > http://lists.ovirt.org/mailman/listinfo/users
> >
>
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