Open Stack

On Fri, 7 Jun 2019 at 18:52, Mohammed Naser <mnaser at vexxhost.com> wrote:
>
> On Wed, Jun 5, 2019 at 5:16 AM Mark Goddard <mark at stackhpc.com> wrote:
> >
> > Hi,
> >
> > At the recent kolla virtual PTG [1] we had a good discussion about
> > adding support for multiple nova cells in kolla-ansible. We agreed a
> > key requirement is to be able to perform operations on one or more
> > cells without affecting the rest for damage limitation. This also
> > seems like it would apply to upgrades. We're seeking input on
> > ordering. Looking at the nova upgrade guide [2] I might propose
> > something like this:
> >
> > 1. DB syncs
> > 2. Upgrade API, super conductor
> >
> > For each cell:
> > 3a. Upgrade cell conductor
> > 3b. Upgrade cell computes
> >
> > 4. SIGHUP all services
>
> Unfortunately, this is a problem right now:
>
> https://review.opendev.org/#/c/641907/
>
> I sat down at the PTG to settle this down, I was going to finish this
> patch up but I didn't get around to it.  That might be an action item
> to be able to do this successfully.
>

Ah, that's true. Thanks for reminding me. s/SIGHUP/restart/,

> > 5. Run online migrations
> >
> > At some point in here we also need to run the upgrade check.
> > Presumably between steps 1 and 2?
> >
> > It would be great to get feedback both from the nova team and anyone
> > running cells
> > Thanks,
> > Mark
> >
> > [1] https://etherpad.openstack.org/p/kolla-train-ptg
> > [2] https://docs.openstack.org/nova/latest/user/upgrade.html
> >
>
>
> --
> Mohammed Naser — vexxhost
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