Comment 3 for bug 1687187

The problem here is that some parts of nova use the older style driver interface to configure networking (yet another pluggable python module thing), whereas most of nova uses the newer API interface. Antique remainders include the metadata server iptables thing, DHCP, and DNS.

The driver interface and API interface do not overlap however, so its not as simple as just replacing calls to one with calls to the other. Instead, we'll need to work through all the calls to the driver interface and decide what to do with them.