[openstack-dev] [api][all] api variation release by release

Matt Riedemann mriedem at linux.vnet.ibm.com
Wed Jan 13 02:55:41 UTC 2016

On 1/12/2016 7:27 PM, joehuang wrote:
> Hello,
> As more and more OpenStack release are deployed in the production cloud,
> multiple releases of OpenStack co-located in a cloud is a very common
> situation. For example, “Juno” and “Liberty” releases co-exist in the
> same cloud.
> Then the cloud management software has to be aware of the API variation
> of different releases, and deal with the different field of object in
> the request / response. For example, in “Juno”, no “multiattach” field
> in the “volume” object, but the field presents in “Liberty”.
> Each releases will bring some API changes, it will be very useful that
> the API variation will also be publish after each release is delivered,
> so that the cloud management software can read and changes and react
> accordingly.
> Best Regards
> Chaoyi Huang ( Joe Huang )
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Have you heard of this effort going on in multiple projects called 
microversions? For example, in Nova:


Nova and Ironic already support microversioned APIs. Cinder and Neutron 
are working on it I think, and there could be others.



Matt Riedemann

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