[ovirt-users] InClusterUpgrade Scheduling Policy

[Scott]

Actually, I figured out a work around. I changed the HostedEngine VM's
vds_group_id in the database to the vds_group_id of my temporary cluster
(found from the vds_groups table). This worked and I could put my main
cluster in upgrade mode. Now to continue the process...

Thanks,
Scott

On Fri, Jun 24, 2016, 9:29 AM Scott <romracer at gmail.com> wrote:

> Hi Roman,
>
> I made it through step 6 however it does look like the problem you
> mentioned has occurred.  My engine VM is running on my host in the
> temporary cluster.  The stats under Hosts show this.  But in the Virtual
> Machines tab this VM still thinks its on my main cluster and I can't change
> that setting.  Did you have a suggestion on how to work around this?
> Thankfully only one of my RHEV instances has this upgrade path.
>
> Thanks for your help,
> Scott
>
> On Fri, Jun 24, 2016 at 2:15 AM Roman Mohr <rmohr at redhat.com> wrote:
>
>> On Thu, Jun 23, 2016 at 10:26 PM, Scott <romracer at gmail.com> wrote:
>> > 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.
>>
>> The bug is here: https://bugzilla.redhat.com/show_bug.cgi?id=1349745.
>>
>> I thought about the solution and I see one possible problem with this
>> approach. It might be that the engine still thinks that the VM is on
>> the old cluster.
>> Let me know if this happens, we can work around that too.
>>
>> Roman
>>
>> > 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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