Comment 4 for bug 1664806

Another note on this: today I'm visiting a customer and the issue of "default DNS" came up. The normal use case for MAAS is "everything points to the MAAS server", which implies no special DNS setup on a per-subnet/per-interface basis.

The way this is currently accomplished with curtin is to write the default DNS servers into the loopback interface declaration in /etc/network/interfaces.

Is it possible to do something similar with networkd?

Another way I've solved this personally is to create a bridge that isn't connected to any external interfaces and place the configuration there, such as:

    # Host-only bridge for containers.
    iface host0 inet manual
        bridge_ports none
        bridge_stp off
        bridge_waitport 0
        bridge_fd 0
        dns-nameserver 8.8.8.8
        dns-nameserver 8.8.4.4