unreliable/racy/incomplete interface state detection at boot

[Junien F]

Hi,

This is somewhat related to bug 1772137. I have a "firewall" script in routable.d and here's what I get upon boot : https://pastebin.canonical.com/p/bCkQrdm3HB/

I'm interested in the "vlan3060" interface. This interface, once networkd finishes its setup, properly comes up and networkd sees it in state "State: routable (configured)".

Thus, I would expect networkd-dispatcher to run routable.d/firewall for this interface. However, as you can see in the paste above, it only runs off.d scripts for this interface.

In the aforementioned bug, we (Ubuntu) added "--run-startup-triggers" in /etc/default/networkd-dispatcher which explains why networkd-dispatcher is running off.d scripts for vlan3060. This is fine. However, I would expect it to also run carrier.d and routable.d script as this interface becomes fully functional.

Thanks