[openstack-dev] Version header for OpenStack microversion support

Clint Byrum clint at fewbar.com
Tue Jun 21 05:59:26 UTC 2016

Excerpts from Edward Leafe's message of 2016-06-20 20:41:56 -0500:
> On Jun 18, 2016, at 9:03 AM, Clint Byrum <clint at fewbar.com> wrote:
> > Whatever API version is used behind the compute API is none of the user's
> > business.
> Actually, yeah, it is.
> If I write an app or a tool that expects to send information in a certain format, and receive responses in a certain format, I don't want that to change when the cloud operator upgrades their system. I only want things to change when I specifically request that they change by specifying a new microversion.

The things I get back in the compute API are the purview of the compute
API, and nothing else.

Before we go too far down this road, is there actually an example of
one API providing a proxy to another directly? If so, is it something
we think is actually a good idea?

Because otherwise, the API I'm talking to needs to be clear about what
it does and does not emit and/or accept. That contract would just be
the microversion of the API I'm talking to.

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