Using xenial lxd container, migrating to networkd using netplan, and updating generated .network file to include RequiredForOnline=false, i can see that it is correctly ignored.
# dpkg-query -W systemd systemd 229-4ubuntu21.2 # /lib/systemd/systemd-networkd-wait-online --timeout=5 ignoring: lo ignoring: eth0 Event loop failed: Connection timed out ** Tags removed: verification-needed-xenial ** Tags added: verification-done-xenial -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to systemd in Ubuntu. https://bugs.launchpad.net/bugs/1737570 Title: Add support for RequiredForOnline in networkd Status in systemd package in Ubuntu: Fix Released Status in systemd source package in Xenial: Fix Committed Status in systemd source package in Zesty: Won't Fix Status in systemd source package in Artful: Fix Committed Status in systemd source package in Bionic: Fix Released Bug description: [Impact] * netplan & networkd based systems typically await networking to be up on boot, without any ability to specify that an interface should be configured, but might not be online at boot. This is a backport of the RequiredForOnline= feature to match optional=true in netplan. [Test Case] * Configure a netowkring interface using .link/.network file and specify RequiredForOnline=False * Bring the interface down / offline it * execute systemd-networkd-wait-online, which should exit immediately since no interfaces are required to be online [Regression Potential] * This adds a support for an additional stanza in the network files. This stanza is not used by default. if the stanza is used, but older networkd is in use, networkd will ignore this unknown stanza. Thus this change is backward and forward compatible. The difference is that boot is not blocked awaiting systemd-networkd-wait-online to timeout. [Other Info] * Original bug report Add support for RequiredForOnline in networkd https://github.com/systemd/systemd/commit/c1a3890410f043fe09af8b139eb6bfe2832089be RequiredForOnline= denotes a link/network that does/does not require being up for systemd-networkd-wait-online to consider the system online; this makes it possible to ignore devices without modifying parameters to wait-online. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1737570/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
