Looking for an update on this - specifically the seemingly unanswered question of "does removing all netplan related config render systemd- netword 'toothless'". I too am very concerned that simply installing ifupdown doesn't by itself achieve the result that seems to be put forth by the various pieces of documentation and advice around these issues.
I'm currently fighting vmware guest customizations on 18.04 (a whole other rabbit hole...) - but my current solution is in jeopardy if systemd-networkd is "touching" interfaces before I can get ansible to do it's thing. I'm currently testing and troubleshooting this. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to ifupdown in Ubuntu. https://bugs.launchpad.net/bugs/1771236 Title: forced use of systemd-networkd interferes with ifupdown in 18.04 Status in ifupdown package in Ubuntu: Incomplete Status in systemd package in Ubuntu: Incomplete Bug description: For several reasons, we are not able to use netplan nor systemd- networkd due to legacy applications that expect ifupdown's pre-up and post-up script mechanism. The documentation around 18.04's (premature, I feel) wholesale adoption of netplan claims that one can revert to old behaviour by merely installing ifupdown (amongst assertions that netplan will never offer a mechanism for configuring pre-up and post-up actions even for network managers that support them). However when ifupdown is installed, systemd-networkd still tries to manage interfaces. If you 'systemctl disable systemd-networkd', upon next reboot it is automatically re-enabled. We tried disabling any systemd units even remotely related to networking and yet systemd- networkd still runs. If it hasn't been configured, it tries to DHCP. On networks that don't provide DHCP this results in a stupendously long stall during boot. Currently it appears to be impossible to tell systemd-networkd not to run in a clean manner that won't get reverted on package upgrades. I sincerely hope this is is a bug/oversight and not intentional. We need to be able to disable systemd-networkd properly. Thanks To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ifupdown/+bug/1771236/+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
