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On Aug 2, 2012, at 3:44 PM, Dan Wendlandt wrote:

> 
> 
> On Thu, Aug 2, 2012 at 12:54 PM, Kyle Mestery (kmestery) <kmestery at cisco.com> wrote:
> All:
> 
> Is there any thought about enabling a mechanism to allow Quantum extensions to be used during the spawn of a VM by nova? I'm thinking that as Quantum extensions are used going forward, it would be nice to enable this functionality during VM spawn. If no one has thought about this, I'll go ahead and file a blueprint and look into this.
> 
> Hi Kyle, can you describe the use case a bit more?  In general, we try to keep additional interactions between nova + quantum to a minimum, with the idea that a user can pre-provision a port directly again the quantum API, then tell nova to boot a VM using a particular port (or ports).  The one case that I can think of where additional calls may be needed is if certain parameters need to be passed to libivrt or some other virt driver in order to boot the VM itself (we've seen this with some of the specialized NIC scenarios).  The thinking here is that we could isolate such calls to being with a specific vif-plugging driver.  Does your use case fit either of those two models? 
> 
I think this proposal fits with the work Nachi is doing. I think this fits the use case of the specific VIF plugging driver. If we combine that with the pre-creation of the port (and associated extension calls at that time), I think this covers the use case I was thinking about.

Thanks Dan!
Kyle

> Dan
> 
>  
> 
> Thanks!
> Kyle
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> Dan Wendlandt 
> Nicira, Inc: www.nicira.com
> twitter: danwendlandt
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