I'm working under CentOS 6.4 + Havana.
I noticed there is a command can add a new virtual port to an active instance. nova interface-attach
But, after this command, I have to get into the instance, and edit the new virtual NIC's configuration file to let it get IP from dhcp.
After a new virtual port been added, is there a way to enable the instance to auto detected the new NIC and get IP from dhcp by itself ?