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
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https://bugs.launchpad.net/bugs/1806463
Title:
Unattended-Upgrade::InstallOnShutdown "true" not working
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