Open Stack

The port mapping feature is the -p flag on the "docker run" command. It determines which ports in the network namespace of the container are exposed to the root namespace. It configures iptables rules and docker proxy capabilities to achieve the desired result. This feature is essential, so we must not break it.

In other words, this feature is what allows a network port within a container to be externally accessed, and on what IP address(es) and port number(s) on the host.

Example:

docker run -d -p 12.34.56.7:8000:80 nginx:latest

This runs the nginx container and exposes top port 80 from inside the container to tcp port 8000 on 12.34.56.7 on the host. Without this feature docker is rather useless for running network services unless you use -net host or an equivalent workaround. This could break a lot of tooling that depends on -p.

--
Adrian

On Aug 14, 2015, at 6:57 AM, Gal Sagie <gal.sagie at gmail.com<mailto:gal.sagie at gmail.com>> wrote:

Hi feisky,

I think thats a great question, not because of port-mapping in particular :) but because
we need to think on a feature by feature basis and map all the features the dockers API allow which
we cannot support directly with Neutron API or its services sub-projects API.
(apuimedo, maybe we need to set this as a future task for us)

But we also need to understand the use cases for supporting these API's so we can address them
and give them priorities (and this is something we as a community need to decide how to handle).

For your question, given that we have network isolation and security from neutron API's and given
we have NAT support (by Neutron API and the plugins implementing the network) , what do you see as a use case to use the port-mapping ?

I welcome you and everyone else to raise and describe these use cases so the Neutron/Kuryr community can think
how to solve and help, and if needed also adjust or add extensions for support.

Thanks
Gal.


On Fri, Aug 14, 2015 at 7:28 AM, feisky <feiskyer at gmail.com<mailto:feiskyer at gmail.com>> wrote:
Will Kuryr supports docker's port-mapping?



--
View this message in context: http://openstack.10931.n7.nabble.com/neutron-kuryr-magnum-Design-Specification-for-Kuryr-tp82256p82299.html
Sent from the Developer mailing list archive at Nabble.com<http://Nabble.com>.

__________________________________________________________________________
OpenStack Development Mailing List (not for usage questions)
Unsubscribe: OpenStack-dev-request at lists.openstack.org?subject:unsubscribe<http://OpenStack-dev-request@lists.openstack.org?subject:unsubscribe>
http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev



--
Best Regards ,

The G.
__________________________________________________________________________
OpenStack Development Mailing List (not for usage questions)
Unsubscribe: OpenStack-dev-request at lists.openstack.org<mailto:OpenStack-dev-request at lists.openstack.org>?subject:unsubscribe
http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstack.org/pipermail/openstack-dev/attachments/20150814/ba79fdfc/attachment.html>