[systemd-devel] Best practices for starting unit only if network is online

[Paul Menzel]

Dear systemd folks,


fwupd ships the service unit `fwupd-refresh.service` with the ordering 
below [1].

     After=network.target network-online.target systemd-networkd.service 
NetworkManager.service connman.service

I would have thought ordering after `network-online.target` would be 
enough. Are there best practices for ensuring that the network is working?

(As a sidenote, the service seems to be only activated by a timer [2], 
so network will be up probably.)


Kind regards,

Paul


[1]: 
https://github.com/fwupd/fwupd/blob/4f28afb6e720215a33805f37d1845ec425a45256/data/motd/fwupd-refresh.service.in#L4
[2]: 
https://github.com/fwupd/fwupd/blob/master/data/motd/fwupd-refresh.timer