Public bug reported:
Cosmic, unattended-upgrades 1.5ubuntu3.18.10.0
Trying to get install-on-shutdown working. Added << Unattended-
Upgrade::InstallOnShutdown "true"; >> to apt.conf.
It appears that the logic for install-on-shutdown is in /usr/share
/unattended-upgrades/unattended-upgrade-shutdown. The logic for run-on-
shutdown is in UnattendedUpgradesShutdown.try_iter_on_shutdown, which is
only called by iter "if not self.stop_signal_received.is_set()".
However, since --wait-for-signal is true, it waits for a signal, then
the iter says "signal recieved, so skip upgrade":
1. apt.conf: Unattended-Upgrade::InstallOnShutdown "true" (though, unused)
2. unattended-upgrades.service: .../unattended-upgrade-shutdown
--wait-for-signal
3. UnattendedUpgradesShutdown.run: signal_handler is installed; wait.
4. UUS.run.signal_handler: stop_signal_received.set(); start_iterations()
5. UUS.start_iterations: scheduler timer to call self.iter
6. UUS.iter: not self.stop_signal_received.is_set() is always False
7. UUS.try_iter_on_shutdown is never called
** Affects: unattended-upgrades (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1806463
Title:
Unattended-Upgrade::InstallOnShutdown "true" not working
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