Comment 6 for bug 1835275

After looking some more into this, I noticed two more things that are off:

Jul 09 00:37:13 maas-test-2 systemd-networkd[1734]: bond0: netdev could not be created: Operation not supported

^ Operation not supported here is quite weird. I can't think of a reason why it could happen. Are you using a special kernel there? Is it missing some module that needs to be modprobed (bonding)? What else might make creating a bond UNSUPP?

Also, the other errors:

Jul 09 00:37:13 maas-test-2 systemd-networkd[1734]: Could not emit changed OperationalState: Transport endpoint is not connected

Indicate there is no valid connection to the systemd bus. Why would DBUS not be running? This isn't a question of mountpoints, but at the very least a question of the makeup of the ephemeral environment, for instance, if not all the services are started correctly there.

If you're in the ephemeral environment, what happens if you run:

systemctl is-system-running

and

sudo systemd-analyze critical-chain