Hello Poldi and thanks for this bug report. It seems that mysqld can't
notify systemd it started because it can't connect to the notification
socket:
2020-12-23T00:42:48.986520Z 0 [Warning] [MY-011807] [Server] Failed to
connect to systemd notification socket named /run/systemd/notify. Error:
'Permission denied'
The AppArmor profile shipped with mysql-server-8.0 has a specific rule
to allow mysqld to connect to /run/systemd/notify:
# Allow systemd notify messages
/{,var/}run/systemd/notify w,
however this is missing from the AppArmor profile attached to this bug
report. The bug description shows that the profile has been manually
modified:
modified.conffile..etc.apparmor.d.usr.sbin.mysqld: [modified]
mtime.conffile..etc.apparmor.d.usr.sbin.mysqld: 2017-01-30T16:55:00.692188
This is the root of the problem. Purging mysql-server-8.0 (apt purge)
and reinstalling it should reinstall the correct AppArmor profile
(careful with your existing databases!).
I'm setting this bug report to Incomplete for the moment. If you agree
this is a local configuration issue rather than a bug please set its
status to Invalid. If you still believe this is a bug in Ubuntu please
follow-up with you reasoning and set the bug status back to New, we'll
look at it again. Thanks!
** Changed in: mysql-8.0 (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1909043
Title:
cannot upgrade mysql server package
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