[openstack-dev] [nova] Problem with Quota and servers spawned in groups

Sławek Kapłoński slawek at kaplonski.pl
Wed Nov 16 21:55:43 UTC 2016

Best regards / Pozdrawiam
Sławek Kapłoński
slawek at kaplonski.pl

On Wed, 16 Nov 2016, Chris Friesen wrote:

> On 11/15/2016 06:50 PM, melanie witt wrote:
> > On Tue, 15 Nov 2016 18:10:40 -0600, Chris Friesen wrote:
> > > I'm in favor of your change, since the existing behaviour doesn't make
> > > sense.
> > > 
> > > But at some point I guess consistency trumps correctness, and if a new
> > > microversion is necessary to mark the new behaviour then a spec is
> > > required, and at that point we might want to fix the other issues with
> > > multi-boot at the same time.  (Like
> > > https://bugs.launchpad.net/nova/+bug/1458122 )
> > 
> > I think what Sławek is saying is that the quota behavior for multi-create
> > already changed at some point in the past, without a spec. He did experiments
> > recently that show a multi-create request succeeds as long as the min_count is
> > satisfied when there isn't enough quota for max_count. This is different than
> > the behavior at the time you opened the bug. So it seems the horse has left the
> > barn on this one.
> The bug I reported is not related to quota, but rather the ability to
> schedule the instances.
> The issue in the bug report is that if I ask to boot a min of X and a max of
> Z instances, and only Y instances can be scheduled (where X<Y<Z) then the
> request will fail and all the instances will be put into an ERROR state.

As I said before, I was testing it and I didn't have instances in Error
state. Can You maybe check it once again on current master branch?

> Arguably what *should* happen is that Y instances get created.  Also I think
> it would make more sense if the remaining  Z-Y instances are just never
> created rather than being created in an ERROR state.
> Chris
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