Open Stack

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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