Fixed ip info shown for port even when dhcp is disabled

[Pasquale Porreca]

As a user it is very confusing (especially in Horizon dashboard) having the IP address displayed even when the DHCP is disabled for the subnet the port belongs to: the user would expect that the IP address shown is actually assigned to the instance, but this is not the case, since the DHCP is disabled.

I asked in the ML about this issue (http://lists.openstack.org/pipermail/openstack-dev/2014-December/053069.html) and I understood that neutron needs to reserve an IP address for a port even in the case it is not assigned, anyway I think this info should not be displayed or should be differently specified.

In a first moment I thought about raising the bug against Horizon, but I feel the correct place to fix this is in neutron. Before to assign this bug to myself I would like to get some feedback by other developers, my idea for a possible solution is to add a boolean element "assigned" to "fixed_ip" dict with value False when in the subnet identified by "subnet_id" DHCP is disabled.

[Eugene Nikanorov (enikanorov)]

What you get through the API is just a reflection of DB state, in which a port has IP address regardless of subnet settings.
I don't think output should be affected by the state of the backend.

So IMO, we don't need to fix this.

[Pasquale Porreca (pasquale-porreca)]

Maybe the solution I proposed is not the best one, but I still feel this is something that should be handled somewhere.
This is an issue that I noticed in Horizon even before I started to give a look to any OpenStack code, in fact I was just using it as an user.
As an user I assume that the IP address shown in the dashboard at the side of the instance name is actually assigned to that instance and not something useful for internal OpenStack use.