I just confirmed that InstallOnShutdown does work, it is triggered by
PrepareForShutdown(), not the TERM signal:
balint@yogi:~$ lxc launch ubuntu:cosmic cc-lp-1806463
Creating cc-lp-1806463
Starting cc-lp-1806463
rbalint@yogi:~$ lxc shell cc-lp-1806463
root@cc-lp-1806463:~# apt update
...
root@cc-lp-1806463:~# apt install unattended-upgrades
...
root@cc-lp-1806463:~# reboot
...
# enable InstallOnShutdown:
root@cc-lp-1806463:~# vi /etc/apt/apt.conf.d/50unattended-upgrades
root@cc-lp-1806463:~# dbus-send --system --print-reply
--dest=org.freedesktop.login1 /org/freedesktop/login1
"org.freedesktop.login1.Manager.Reboot" boolean:false
method return time=1543938923.733435 sender=:1.2 -> destination=:1.14 serial=32
reply_serial=2
root@cc-lp-1806463:~# top
...
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
547 root 20 0 257324 86180 49460 S 1.0 0.5 0:02.81
unattended-upgr
567 root 20 0 258132 73168 36236 S 0.0 0.5 0:00.08
unattended-upgr
237 root 20 0 627388 30768 16548 S 0.0 0.2 0:00.34 snapd
233 root 20 0 125852 21016 12980 S 0.0 0.1 0:00.09
unattended-upgr
229 root 20 0 47400 17436 9696 S 0.0 0.1 0:00.09
networkd-dispat
578 root 20 0 18760 11192 2748 D 19.0 0.1 0:00.34 dpkg
...
root@cc-lp-1806463:~#
Session terminated, terminating shell...logout
...terminated.
rbalint@yogi:~$ lxc shell cc-lp-1806463
mesg: ttyname failed: No such device
root@cc-lp-1806463:~# cat /var/log/unattended-upgrades/unattended-upgrades
unattended-upgrades-dpkg.log unattended-upgrades-shutdown.log
unattended-upgrades.log
root@cc-lp-1806463:~# cat
/var/log/unattended-upgrades/unattended-upgrades-shutdown.log
2018-12-04 15:54:11,587 WARNING - SIGTERM or SIGHUP received, stopping
unattended-upgradesonly if it is running
2018-12-04 15:55:23,748 WARNING - Running unattended-upgrades in shutdown mode
2018-12-04 15:55:23,765 WARNING - Unattended-upgrade in progress during
shutdown, please don't turn off the computer
Progress: 0.0025 % (perl-base,perl-modules-5.26,libperl5.26,perl)
2018-12-04 15:55:26,737 WARNING - Unattended-upgrade in progress during
shutdown, please don't turn off the computer
Progress: 0.0 % (perl-modules-5.26)
2018-12-04 15:55:29,740 WARNING - Unattended-upgrade in progress during
shutdown, please don't turn off the computer
Progress: 20.0 % (perl-modules-5.26)
2018-12-04 15:55:32,742 WARNING - Unattended-upgrade in progress during
shutdown, please don't turn off the computer
Progress: 80.0 % (perl-modules-5.26)
2018-12-04 15:55:35,746 WARNING - Unattended-upgrade in progress during
shutdown, please don't turn off the computer
Progress: 46.1538 % (perl)
2018-12-04 15:55:38,747 WARNING - Unattended-upgrade in progress during
shutdown, please don't turn off the computer
Progress: 92.3077 % (perl)
2018-12-04 15:55:41,752 WARNING - Unattended-upgrade in progress during
shutdown, please don't turn off the computer
Progress: 92.3077 % (perl)
2018-12-04 15:55:41,769 INFO - All upgrades installed
For more details please see the
/usr/share/doc/unattended-upgrades/NEWS.Debian.gz, the changelog, and LP:
#1803137.
** Changed in: unattended-upgrades (Ubuntu)
Status: New => Incomplete
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to unattended-upgrades in
Ubuntu.
https://bugs.launchpad.net/bugs/1806463
Title:
Unattended-Upgrade::InstallOnShutdown "true" not working
Status in unattended-upgrades package in Ubuntu:
Incomplete
Bug description:
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
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/unattended-upgrades/+bug/1806463/+subscriptions
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