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On 06/09/2015 10:28 AM, Daniel P. Berrange wrote:
> On Tue, Jun 09, 2015 at 03:07:51PM +0100, Neil Jerram wrote:
>> Secondly there is the VIF plug script idea, and it's here that the elephant
>> may be.  I'm afraid that some of the interested people (including me) missed
>> it, but I heard that the core team discussed this and expressed concern, in
>> one of the Vancouver sessions, about 'not wanting Nova to become a
>> pass-through API'.  Since then, spec work has continued, but the only core
>> input has come from Dan PB, who wasn't in that Vancouver session - so I'm
>> worried that the Nova core team as a whole might not support this idea, and
>> that the ongoing spec refinement might turn out to be rearranging the deck
>> chairs on the Titanic.
>
> As you said, I wasn't there, so I don't know what the objections were, but
> I'm personally not supportive of adding any new VIF types until we have
> the VIF plugging script work done. This concept is critical to preventing
> the further explosion in the number of VIF types we need, and in allowing
> vendors to add new neutron mechanisms without always requiring a lock-step
> update to Nova.
>
> So from that POV I think the VIF script thing needs to be the #1 priority
> wrt VIF driver work in Nova/libvirt for Liberty.

FTR, here is the VIF plugin script spec in Nova:

https://review.openstack.org/#/c/162468/13/specs/liberty/approved/vif-plug-script.rst

Best,
-jay