On 06/15/2015 01:07 PM, Jay Pipes wrote:
It has come to my attention in [1] that the microversion spec for Nova
[2] and Ironic [3] have used the project name -- i.e. Nova and Ironic
-- instead of the name of the API -- i.e. "OpenStack Compute" and
"OpenStack Bare Metal" -- in the HTTP header that a client passes to
indicate a preference for or knowledge of a particular API microversion.
The original spec said that the HTTP header should contain the name of
the service type returned by the Keystone service catalog (which is
also the official name of the REST API). I don't understand why the
spec was changed retroactively and why Nova has been changed to return
X-OpenStack-Nova-API-Version instead of
X-OpenStack-Compute-API-Version HTTP headers [4].
When it comes to enforcing policy for these APIs, what should we
realistically be matching against? Thus far, policy ghas been a purely
internal thing, with only an implicit mapping from the API to the policy
rule, but I gathered there was a push especially due to microversions to
make the two more aligned.
At a minimum, I would think that the namespace of the rule should match
the header, and we've been pushing that the rules should be namespaced
"identity", "compute" and so forth.
To be blunt, Nova is the *implementation* of the OpenStack Compute
API. Ironic is the *implementation* of the OpenStack BareMetal API.
The HTTP headers should never have been changed like this, IMHO, and
I'm disappointed that they were. In fact, it looks like a very select
group of individuals pushed through this change [5] with little to no
input from the mailing list or community.
Since no support for these headers has yet to land in the client
packages, can we please reconsider this?
Thanks,
-jay
[1] https://review.openstack.org/#/c/187112/
[2]
https://github.com/openstack/nova-specs/blob/master/specs/kilo/implemented/api-microversions.rst
[3]
https://github.com/openstack/ironic-specs/blob/master/specs/kilo/api-microversions.rst
[4] https://review.openstack.org/#/c/155611/
[5] https://review.openstack.org/#/c/153183/
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