Public bug reported: I started a system with cloud-init disabled, etc. and a single real network interface (ens3) that could be configured.
That VM has no configuration whatsoever for systemd-networkd, as that would have to have been written by netplan, and cloud-init did not generate netplan config (because it was disabled). So: root@ubuntu:/etc/systemd/system/network-online.target.wants# ip route d-networkd-wait-online --ignore=lo ignoring: lo Event loop failed: Connection timed out root@ubuntu:/etc/systemd/system/network-online.target.wants# ip route root@ubuntu:/etc/systemd/system/network-online.target.wants# networkctl IDX LINK TYPE OPERATIONAL SETUP 1 lo loopback carrier unmanaged 2 ens3 ether off unmanaged 3 sit0 sit off unmanaged 3 links listed. root@ubuntu:/etc/systemd/system/network-online.target.wants# The system took 120 seconds to complete boot, because wait-online had to finish; and running wait-online from the system afterwards also waits 120 seconds (its default timeout). If there is no configuration for an interface, it's unmanaged (as shown by networkctl), so wait-online should not wait, and simply report that all interfaces are unmanaged, possibly returning an error so we don't reach network-online. FWIW, having wait-online look up configuration might later be useful also to figure out if an interface was configured, but marked as optional (such that it is explicitly not required to be up at boot), or if we want to configure network devices but specify that networkd should *not* bring them online (like "administratively disabled" interfaces in Cisco world using the "shutdown" command). ** Affects: systemd (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1728181 Title: systemd-networkd-wait-online waits when devices are unmanaged To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1728181/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs