On 2019-10-15, Yvan Masson <yvan@masson-informatique.fr> wrote:
I am currently using a VM with snapshots to try to find the culprit, I
will let you know.
I could not find the culprit so I reported the bug:
https://github.com/mvo5/unattended-upgrades/issues/229
There's this (not sure if it's your issue or not):
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=837155
If /var resides on a separate file-system which is unmounted before
unattended-upgrade-shutdown is run, it may repeatedly (by default for
10 minutes) try to acquire it's lock-file but fail since the containing
folder doesn't exist.
For which the fix is a file
/etc/systemd/system/unattended-upgrades.service.d/mounts.conf
containing
[Unit]
RequiresMountsFor=/var/log
Maybe irrelevant. Or not.
A bientôt,
C.