macvlan uses the specified host's interface to send the
packets. However macvlan will have its own MAC address
(randomly generated by the kernel) making it look like
yet another interface on the link.
Fixes#478
- Convert ipamanager into IPAM plugin (static) that uses env
variables instead of cmd line args
- Make bridge and veth plugins call out to IPAM plugin
- Refacor code around the new IPAM plugins
Simplifying the plugin interface. No more HTTP interface and plugin
configs. Plugin type maps to executable name in stage1 rootfs or
on host in a well known dir. Env vars are used for parameter passing
to the plugin. Also, default net conf is kept in stage1 rootfs to make
private networking work "out of the box".
Eugene Yakubovich