Open Stack

> We're moving quotas to the API and we're going to stop doing the 
> reservation/commit/rollback race dance between API and compute nodes per 
> this spec:
>
> https://specs.openstack.org/openstack/nova-specs/specs/ocata/approved/cells-count-resources-to-check-quota-in-api.html

It's very nice spec. If we can remove all quota_usages and reservations
stuff it will be great. As I understand a lot of places should be
changed I'd happy to take part and to help.

Matt Riedemann writes:

> On 12/15/2016 3:11 AM, Andrey Volkov wrote:
>> Hi,
>>
>> I totally agree with Matt than `os-quota-class-sets` is inconsistent.
>> It has that hardcoded default class can't be changed.
>> API call is documented neither Nova nor Cinder (has the same API for
>> quotas).
>>
>> With defaults in the configuration I have some concerns:
>> - As it was mentioned before, possibly we need to update configs in
>> several places.
>
> We're moving quotas to the API and we're going to stop doing the 
> reservation/commit/rollback race dance between API and compute nodes per 
> this spec:
>
> https://specs.openstack.org/openstack/nova-specs/specs/ocata/approved/cells-count-resources-to-check-quota-in-api.html
>
> So that would mean you really only need the default quota configuration 
> on the API node, so I don't think this is as much of a problem after 
> that change.
>
>> - To make changes be applied we need to restart service, possibly SIGHUP
>> can help
>>   but I'm not sure.
>
> I'd think we could make these mutable config options so we could pickup 
> the changes without restarting the service.
>
>>
>> Alternatives I see are:
>> - Update `os-quota-sets` and give it possibility to work with defaults.
>> - Use external centralized quota service on which the work's doing actively.
>>   Please see [1] spec for limits in keystone and doc [2] having information
>>   how it can be applied in Nova and Cinder.
>>
>> [1] https://review.openstack.org/#/c/363765/
>> [2]
>> https://docs.google.com/document/d/1AqmmRvd_e-4Hw2oLbnBf5jBtjLgMj-kqAaQfofp_NYI/edit#
>>
>>

-- 
Thanks,

Andrey Volkov,
Software Engineer, Mirantis, Inc.