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Interesting, I'll have a look.  We should get this on the neutron drivers'
agenda.  The drivers team has been dormant for a couple of weeks but I'm
sure it will pick up again very soon.

Carl
On Sep 20, 2015 12:28 AM, "Gal Sagie" <gal.sagie at gmail.com> wrote:

> Hello All,
>
> I have sent a spec [1] to resume the work on port forwarding API and
> reference implementation.
>
> Its currently marked as "WIP", however i raised some "TBD" questions for
> the community.
> The way i see port forwarding is an API that is very similar to floating
> IP API and implementation
> with few changes:
>
> 1) Can only define port forwarding on the router external gateway IP (or
> additional public IPs
>    that are located on the router.  (Similar to the case of centralized
> DNAT)
>
> 2) The same FIP address can be used for different mappings, for example
> FIP with IP X
>     can be used with different ports to map to different VM's X:4001  ->
> VM1 IP
>     X:4002 -> VM2 IP (This is the essence of port forwarding).
>     So we also need the port mapping configuration fields
>
> All the rest should probably behave (in my opinion) very similar to FIP's
> (for example
> not being able to remove external gateway if port forwarding entries are
> configured,
> if the VM is deletd the port forwarding entry is deleted as well and so
> on..)
> All of these points are mentioned in the spec and i am waiting for the
> community feedback
> on them.
>
> I am trying to figure out if implementation wise, it would be smart to try
> and use the floating IP
> implementation and extend it for this (given all the above mechanism
> described above already
> works for floating IP's)
> Or, add another new implementation which behaves very similar to floating
> IP's in most aspects
> (But still differ in some)
> Or something else...
>
> Would love to hear the community feedback on the spec, even that its WIP
>
> Thanks
> Gal.
>
> [1] https://review.openstack.org/#/c/224727/
>
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