Ok, here is how I understand the situation. According to the systemd documentation about [Unit] Before= :
"Given two units with any ordering dependency between them, if one unit is shut down and the other is started up, the shutdown is ordered before the start-up. It doesn't matter if the ordering dependency is After= or Before=." To me this means that network.service & local-fs.service will be shutdown _BEFORE_ unattended-upgrades-shutdown runs, hence /var var will be unmounted when it runs. My current solution is to turn the unattended-upgrades.service ExecStart= into an ExecStop= so the unit will run as a shutdown instead of a start when the system shuts down : [Unit] Description=Unattended Upgrades Shutdown DefaultDependencies=no Before=shutdown.target reboot.target halt.target network.target local-fs.target Documentation=man:unattended-upgrade(8) [Service] Type=oneshot RemainAfterExit=yes ExecStop=/usr/share/unattended-upgrades/unattended-upgrade-shutdown --debug TimeoutStopSec=900 [Install] WantedBy=shutdown.target Preliminary tests seem to run fine but I want to get confirmation on such a change by someone more expert with systemd that I am. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1654600 Title: unattended-upgrade-shutdown hangs when /var is a separate filesystem To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unattended-upgrades/+bug/1654600/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
