logrotate systemd timer should run hourly rather than daily

[Todd Jacobsen]

Logrotate supports "hourly rotation, however the Ubuntu logrotate systemd Timer runs "daily" - so "hourly" logrotate jobs are still only run daily.

Updating /etc/systemd/system/timers.target.wants/logrotate.timer:
...
[Timer]
OnCalendar=hourly
...

should allow "logrotate hourly" to work as expected.

See related comment at https://github.com/logrotate/logrotate/issues/249#issuecomment-485829363
"The tricky part is that one needs to change the default cron hook
(or systemd timer) to make hourly actually work as expected."

Thanks!

ProblemType: Bug
DistroRelease: Ubuntu 23.04
Package: logrotate 3.21.0-1
ProcVersionSignature: Ubuntu 6.2.0-32.32-generic 6.2.16
Uname: Linux 6.2.0-32-generic x86_64
ApportVersion: 2.26.1-0ubuntu2
Architecture: amd64
CasperMD5CheckResult: unknown
Date: Thu Sep 21 22:11:04 2023
ProcEnviron:
 LANG=en_US.UTF-8
 PATH=(custom, no user)
 SHELL=/bin/bash
 TERM=xterm-256color
 XDG_RUNTIME_DIR=<set>
SourcePackage: logrotate
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[ebob9 (ebob9)]

I am hitting this issue as well - I've been able to work around it by running a script post startup which uses sed to replace the `Daily` lines in the logrotate.timer file with hourly, and reload the systemd daemon config.

#!/bin/bash
sed -i "/Description=Daily rotation of log files/c\Description=Hourly rotation of log files" /lib/systemd/system/logrotate.timer
sed -i "/OnCalendar=daily/c\OnCalendar=hourly" /lib/systemd/system/logrotate.timer
systemctl daemon-reload; systemctl stop logrotate.timer; systemctl start logrotate.timer

This is a crude workaround, but I assume the actual fix should be to modify the same items in the distro logrotate.timer file.