In #10 the log shows that unattended-upgrades is asked to stop after 30
seconds and this is expected with the default configuration, when the
configuration is changed only to enable InstallOnShutdown.
Please note that the behaviour of unattended-upgrades changed as
described in the NEWS file.
$ zless /usr/share/doc/unattended-upgrades/NEWS.Debian.gz
unattended-upgrades (1.1ubuntu1.18.04.7~16.04.0) xenial; urgency=medium
When InstallOnShutdown was configured unattended-upgrades in
versions before 1.1ubuntu1.18.04.7~16.04.0 installed updates _after_ the
shutdown transaction is started by systemd making maintainer scripts
restarting services fail or wait in a deadlock until being killed by
shutdown's timeout leaving a broken installation behind.
Starting with version 1.1ubuntu1.18.04.7~16.04.0 configuring
InstallOnShutdown makes unattended-upgrades start package installations
_before_ the shutdown transaction is started, when PrepareForShutdown()
signal is received via DBus.
Unattended-upgrades 1.1ubuntu1.18.04.7~16.04.0 also increases logind's
InhibitDelayMaxSec to 30 seconds. This allows more time for
unattended-upgrades to shut down gracefully or even install a few
packages in InstallOnShutdown mode, but is still a big step back from
the 30 minutes allowed for InstallOnShutdown previously.
Users enabling InstallOnShutdown mode are advised to increase
InhibitDelayMaxSec even further, possibly to 30 minutes.
In newer versions the configuration file also points this out, but the
configuration file comment change was not SRU-d to avoid conflicts with locally
changed configuration files:
...
// Install all updates when the machine is shutting down
// instead of doing it in the background while the machine is running.
// This will (obviously) make shutdown slower.
// Unattended-upgrades increases logind's InhibitDelayMaxSec to 30s.
// This allows more time for unattended-upgrades to shut down gracefully
// or even install a few packages in InstallOnShutdown mode, but is still a
// big step back from the 30 minutes allowed for InstallOnShutdown previously.
// Users enabling InstallOnShutdown mode are advised to increase
// InhibitDelayMaxSec even further,q possibly to 30 minutes.
//Unattended-Upgrade::InstallOnShutdown "false
...
The problem on the system is that even preprocessing the available
updates takes longer than 30 seconds, thus none of the updates can be
applied. Speeding up the preprocessing part is ongoing, but it will
still be recommended to bump logind's timeout.
** Changed in: unattended-upgrades (Ubuntu)
Status: Confirmed => Invalid
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https://bugs.launchpad.net/bugs/1843099
Title:
Unattended upgrades does not work on shutdown
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