[openstack-dev] [nova] [placement] Upgrade concerns with nested Resource Providers

Sylvain Bauza sbauza at redhat.com
Thu May 31 19:11:27 UTC 2018


On Thu, May 31, 2018 at 3:54 PM, Eric Fried <openstack at fried.cc> wrote:

> This seems reasonable, but...
>
> On 05/31/2018 04:34 AM, Bal√°zs Gibizer wrote:
> >
> >
> > On Thu, May 31, 2018 at 11:10 AM, Sylvain Bauza <sbauza at redhat.com>
> wrote:
> >>>
> >>
> >> After considering the whole approach, discussing with a couple of
> >> folks over IRC, here is what I feel the best approach for a seamless
> >> upgrade :
> >>  - VGPU inventory will be kept on root RP (for the first type) in
> >> Queens so that a compute service upgrade won't impact the DB
> >>  - during Queens, operators can run a DB online migration script (like
> -------------^^^^^^
> Did you mean Rocky?
>


Oops, yeah of course. Queens > Rocky.

>
> >> the ones we currently have in
> >> https://github.com/openstack/nova/blob/c2f42b0/nova/cmd/manage.py#L375)
> that
> >> will create a new resource provider for the first type and move the
> >> inventory and allocations to it.
> >>  - it's the responsibility of the virt driver code to check whether a
> >> child RP with its name being the first type name already exists to
> >> know whether to update the inventory against the root RP or the child
> RP.
> >>
> >> Does it work for folks ?
> >
> > +1 works for me
> > gibi
> >
> >> PS : we already have the plumbing in place in nova-manage and we're
> >> still managing full Nova resources. I know we plan to move Placement
> >> out of the nova tree, but for the Rocky timeframe, I feel we can
> >> consider nova-manage as the best and quickiest approach for the data
> >> upgrade.
> >>
> >> -Sylvain
> >>
> >>
> >
> >
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