[openstack-dev] [nova] proper way to extend index() and add a new property?

Chris Friesen chris.friesen at windriver.com
Thu Mar 12 16:45:32 UTC 2015

On 03/12/2015 08:47 AM, Chris Friesen wrote:
> I'm looking for some technical advice on API extensions.
> I want to add a new field to the output of the "nova service-list" command,
> which currently maps to ServiceController.index().
> For the v2 API this seems straightforward, I can add a new extension and in the
> existing function I can call self.ext_mgr.is_loaded() to see if my extension is
> loaded, similar to the existing code that checks for 'os-extended-services-delete'.
> For v2.1 (ie the plugins in the v3 directory) the extension management seems to
> be different though.  As far as I can tell I can only extend the controller and
> create a new index() that takes as arguments the request and the output of the
> existing index() function.

Never mind, I've since learned about microversions and the fact that the v2 API 
is frozen. I think I'm good.


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