[openstack-dev] [Nova][Quantum] Move quantum port creation to nova-api

Aaron Rosen arosen at nicira.com
Thu May 16 14:02:06 UTC 2013


On Wed, May 15, 2013 at 10:59 PM, Gary Kotton <gkotton at redhat.com> wrote:

>  On 05/15/2013 10:53 PM, Aaron Rosen wrote:
>
>  Hi,
>
>  I created the following blueprint and wanted to hear what the community
> though before starting on it.
>
> https://blueprints.launchpad.net/nova/+spec/nova-api-quantum-create-port
>
>
> In the BP you wrote: "The only downside I see of moving this logic into
> nova-api is that we would slow down the response time from nova-api to
> provision instances."
>
> This can be addressed by nova prefetching quantum ports. When nova needs a
> port is can be retrieved from a cached pool. This may be a way of
> addressing this at a later stage if the nova api is indeed a bottleneck
> when it comes to the quantum interface (please note that this currently
> happens on the compute node at the moment)
>
>
If there are ports that are preallocated and cached in a pool of available
ports on the nova-api node this won't work if running multiple nova-api
nodes with a load balancer in front.


> Thanks
> Gary
>
>
>  Thanks,
>
> Aaron
>
>
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