[osuosl-openpower] Planned outage for POWER9 VMs - Wednesday April 3, 2019 9:00AM PDT (1600 UTC)

[Lance Albertson]

All,

This I did this earlier this morning and neglected to notice that there
were a set of about 10 VMs that did not start properly upon migrating them.
I just went through all of them and they should be up now. I think the
problem was related to an issue with the neutron-linuxbridge-agent not
working properly initially and thus resulted in a failed VM startup on the
other node.

Everything should be back to normal now.

Thanks-

On Tue, Apr 2, 2019 at 4:33 PM Lance Albertson <lance at osuosl.org> wrote:

> All,
>
> I need to have a short outage for all POWER9 virtual machines running on
> our cluster. I've been doing kernel upgrades on the hypervisors and I ran
> into an interesting problem on the POWER9 machines.
>
> For whatever reason, I'm not able to complete a live migration between a
> POWER9 hypervisor running the 4.14 kernel onto a machine which has the
> newer 4.19 kernel. I've confirmed that once the a VM has been moved to a
> machine running the newer kernel, live migrations work between nodes
> running the newer kernel. I did not run into this problem with the POWER8
> nodes.
>
> My plan is to issue a "migrate" command for each POWER9 VM running at 9AM
> PDT (1600 UTC) which will gracefully shutdown the VM and  power it up on
> another server. I expect the outage should last no more than a few minutes
> per VM.
>
> If this is a problem for your project, please let me know ASAP.
>
> Thanks-
>
> --
> Lance Albertson
> Director
> Oregon State University | Open Source Lab
>


-- 
Lance Albertson
Director
Oregon State University | Open Source Lab
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