[systemd-devel] Need help: Program not run when rebooting

[Ulrich Windl]

Hi!

I tried to write a simple test unit that logs a message when the system is
going down (for reboot or halt), but it does not work:
---
[Unit]
Description=Test Stop log entries
Documentation=man:logger(1)
DefaultDependencies=no
After=local-fs.target
Before=reboot.target halt.target shutdown.target poweroff.target kexec.target
Wants=local-fs.target
#ConditionPathExists=/usr/bin/logger

[Service]
Type=oneshot
TimeoutSec=5
RemainAfterExit=yes
ExecStop=/usr/bin/logger -p user.notice -t LCD Stopping...

[Install]
WantedBy=reboot.target halt.target shutdown.target poweroff.target
kexec.target
#WantedBy=multi-user.target
---
After a reboot I see:
---
jeos1:~ # systemctl status log-stop-test.service
● log-stop-test.service - Test Stop log entries
   Loaded: loaded (/etc/systemd/system/log-stop-test.service; enabled; vendor
p>
   Active: active (exited) since Thu 2021-03-11 15:38:42 CET; 9min ago
     Docs: man:logger(1)
    Tasks: 0
   CGroup: /system.slice/log-stop-test.service

Mar 11 15:38:42 jeos1 systemd[1]: Started Test Stop log entries.
--
But no message was written when rebooting. That is, there is a message from
systemd, but no log:
Mar 11 15:17:33 jeos1 systemd[1]: Stopped target Local File Systems.
Mar 11 15:17:33 jeos1 systemd[1]: Started Test Stop log entries.
Mar 11 15:17:33 jeos1 systemd[1]: Unmounting /usr/local...

So I want to run my program much earlier; how to do that?

Regards,
Ulrich