Open Stack

On 04/16/2018 06:23 PM, Eric Fried wrote:
>> I still don't see a use in returning the root providers in the
>> allocation requests -- since there is nothing consuming resources from
>> those providers.
>>
>> And we already return the root_provider_uuid for all providers involved
>> in allocation requests within the provider_summaries section.
>>
>> So, I can kind of see where we might want to change *this* line of the
>> nova scheduler:
>>
>> https://github.com/openstack/nova/blob/stable/pike/nova/scheduler/filter_scheduler.py#L349
>>
>>
>> from this:
>>
>>   compute_uuids = list(provider_summaries.keys())
>>
>> to this:
>>
>>   compute_uuids = set([
>>       ps['root_provider_uuid'] for ps in provider_summaries
>>   ])
> 
> If we're granting that it's possible to get all your resources from
> sharing providers, the above doesn't help you to know which of your
> compute_uuids belongs to which of those sharing-only allocation requests.
> 
> I'm fine deferring this part until we have a use case for sharing-only
> allocation requests that aren't prompted by an "attach-*" case where we
> already know the target host/consumer.  But I'd like to point out that
> there's nothing in the API that prevents us from getting such results.

And I'd like to point out that I originally made the GET 
/allocation_candidates API not return allocation requests when there 
were only sharing providers.

Because... well, there's just no viable use cases for it.

-jay