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On Wed, Apr 30, 2014 at 11:30 PM, Ken'ichi Ohmichi <ken1ohmichi at gmail.com>wrote:

> Hi,
>
> After huge discussion related to v3 API[1], we started to implement v2.1
> API.
> I'd like to share the current status and get feedback before the summit.
>
> Now we are implementing for two items:
> 1. Add response checks to Tempest for Nova API
> 2. Implement v2.1 API
>
> * Add response checks to Tempest for Nova API *
> On the first item, we are adding checks against responses which Nova
> API returns. Through v3 API discussion, we recognized the importance
> of the backward compatibility again, but unfortunately Tempest did not
> contain enough checks which block backward incompatible changes at the
> time because API tests of Tempest did not check all API parameters of
> Nova API responses. To improve this situation, we started to implement
> response validations which check status codes(HTTP200 etc.) and response
> bodies ({"server": {...}}, etc.）for whole Nova API.
> Now most checks of whole Nova API are implemented, and the remainders are
> reviewed on [2].
>
>
Awesome, no matter what the future of new APIs are, I see a lot of value in
this work.


>
> * Implement v2.1 API *
> The main concern about v3 API was that v3 API is v2 incompatible and we
> need to maintain both implementations of both v2 and v3 APIs in long term.
> To solve this issue, we are implementing v2.1 API which translates v2
> format requests to v3 ones and operates v3 operation. After that, it
> translates v3 responses to v2 format ones again and returns them to
> clients.
> The diagram of [3] would be easy to get the design. We will be able to
> use both APIs with single API implementation if v2.1 is available.


> We picked some APIs as PoC targets and tests them on Tempest of the
> gate[4].
> Before these tests, we have already added the above response checks to API
> tests of PoC targets in Tempest and made PoC strict.
> As the result, all PoC target tests were passed so they keep v2 backward
> compatibility.
>
> We have done everything we expected.
> Any thoughts?
>
>
> Thanks
> Ken'ichi Ohmichi
>
> ---
> [1]:
> http://lists.openstack.org/pipermail/openstack-dev/2014-March/028724.html
>
> http://lists.openstack.org/pipermail/openstack-dev/2014-February/027896.html
> [2]:
> https://review.openstack.org/#/q/status:open+project:openstack/tempest+branch:master+topic:bp/nova-api-attribute-test,n,z
> [3]:
> https://wiki.openstack.org/wiki/NovaApiValidationFramework#Combination_of_v2.1_and_v3_APIs
> [4]: https://review.openstack.org/#/c/83256/
>
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>
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