The ```syncthing-resume.service``` will show as a failed service in case
there are no syncthing processes running after resume but it can be
safely ignored because it makes no difference.
GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/3630
Before this change, issuing either
systemctl --user help syncthing[.service]
or
systemctl help syncthing@user[.service]
gave the message
Can't show: http://docs.syncthing.net/
Following this change the syncthing man page is displayed
This systemd service restarts Syncthing after resume from suspend
via sending SIGHUP. By default Syncthing detects resume from sleep
on its own by looking for jumps in the system clock. Since systemd
knows exactly when the system resumes from sleep let's trigger
the Syncthing restart from there. Doing this in systemd eliminates
some annoying delay, as the service is restarted immediately after
resume. Also, using the systemd dependency mechanism syncthing-inotify
is restarted as well.
$ journalctl -e --identifier syncthing --identifier syncthing-inotify --identifier systemd
Feb 22 09:44:27 kronos systemd[1]: Reached target Sleep.
Feb 22 09:44:27 kronos systemd[1]: Starting Suspend...
Feb 22 09:44:33 kronos systemd[1]: Time has been changed
Feb 22 09:44:33 kronos systemd[963]: Time has been changed
Feb 22 09:44:33 kronos systemd[1]: Started Suspend.
Feb 22 09:44:33 kronos systemd[1]: sleep.target: Unit not needed anymore. Stopping.
Feb 22 09:44:33 kronos systemd[1]: Stopped target Sleep.
Feb 22 09:44:33 kronos systemd[1]: Reached target Suspend.
Feb 22 09:44:33 kronos systemd[1]: suspend.target: Unit is bound to inactive unit systemd-suspend.service. Stopping, too.
Feb 22 09:44:33 kronos systemd[1]: Stopped target Suspend.
Feb 22 09:44:33 kronos systemd[1]: Starting Restart Syncthing after resume...
Feb 22 09:44:33 kronos syncthing[2561]: [35K66] OK: Exiting
Feb 22 09:44:33 kronos systemd[1]: Started Restart Syncthing after resume.
Feb 22 09:44:34 kronos systemd[963]: syncthing.service: Service hold-off time over, scheduling restart.
Feb 22 09:44:34 kronos systemd[963]: Stopping Syncthing Inotify File Watcher...
Feb 22 09:44:34 kronos systemd[963]: Stopped Syncthing Inotify File Watcher.
Feb 22 09:44:34 kronos systemd[963]: Stopped Syncthing - Open Source Continuous File Synchronization.
Feb 22 09:44:34 kronos systemd[963]: Started Syncthing - Open Source Continuous File Synchronization.
Feb 22 09:44:34 kronos systemd[963]: Started Syncthing Inotify File Watcher.
Feb 22 09:44:34 kronos syncthing[2836]: [35K66] INFO: syncthing v0.12.19 "Beryllium Bedbug" (go1.5.3 linux-amd64) builduser@svetlemodry 2016-02-14 19:26:33 UTC
This system service has to be located in "/etc/systemd/system/syncthing-resume.service",
and for packages in "/usr/lib/systemd/system/syncthing-resume.service". It can be
enabled using "systemctl enable syncthing-resume.service".
PR #2578 enables us to remove the exit code 2 from the list of
success status codes, because SIGINT will be handled properly.
I have also converted STNORESTART to --no-restart for the sake
of consistency.
The systemd exit code definitions (introduced in c586a17, refs #1324) caused
problems. Per default systemd considers a return code != 0 as failed. So when
you click on "Restart" in the WebUI an error appears:
systemd[953]: syncthing.service: main process exited, code=exited, status=3/NOTIMPLEMENTED
systemd[953]: Unit syncthing.service entered failed state.
systemd[953]: syncthing.service failed.
systemd[953]: syncthing.service holdoff time over, scheduling restart.
systemd[953]: Started Syncthing - Open Source Continuous File Synchronization.
systemd[953]: Starting Syncthing - Open Source Continuous File Synchronization...
syncthing[13222]: [LFKUK] INFO: syncthing v0.10.30 (go1.4.2 linux-amd64 default) builduser@jara 2015-03-29 07:46:44 UTC
To fix this error we have to add the "succes codes" 2, 3, 4 to
"SuccessExitStatus":
syncthing[13006]: [LFKUK] INFO: Restarting
syncthing[13006]: [LFKUK] OK: Exiting
systemd[953]: syncthing.service holdoff time over, scheduling restart.
systemd[953]: Started Syncthing - Open Source Continuous File Synchronization.
systemd[953]: Starting Syncthing - Open Source Continuous File Synchronization...
syncthing[13031]: [LFKUK] INFO: syncthing v0.10.30 (go1.4.2 linux-amd64 default) builduser@jara 2015-03-29 07:46:44 UTC
To make sure that syncthing restarts in case of error, and to make sure
that "Restart=on-failure" actually works, let's remove
"RestartPreventExitStatus=1". Systemd considers this as an error per
default and the restart will be triggered successfully.
Syncthing should not try to start a browser when invoked by systemd.
Furthermore we do not need any timestamps in the journal as systemd
already handles this for us.
- Removed environment file to keep the service file minimal.
"systemctl edit syncthing.service" does the job if somebody wants
to customize the service.
- Changed "cmdline.target" to "default.target" as "cmdline.target"
does not exist in systemd.special:
http://www.freedesktop.org/software/systemd/man/systemd.special.html
- Added a missing "After=network.target".
- Added a documentation hint, thx @jaystrictor
