Comment 1 for bug 1636912

cloud-init already has *very* strong dependencies:

  Requires=networking.service
  Before=basic.target

(which is sorting the early boot fairly strictly). But I guess in the same vein, if cloud-init wants to run in between networkd and basic.target, it needs to grow an After=systemd-networkd.service. I also suggest to replace the "Requires=networking.service" with "After=networking.service" as ifupdown is not mandatory any more.

However, due to networkd's After=dbus.service this wouldn't work yet, as dbus.service runs in late boot -- I proposed/tried to change this, but it's not ready for that (bug 1629797, https://bugs.freedesktop.org/show_bug.cgi?id=98254).

networkd can run without D-Bus in principle, but if that is not running yet but dbus.socket is we'll run into deadlocks again -- and if we start it before we need to teach it to connect to D-Bus once it becomes available.