[solved] Insync: killing service on systemctl stop not working

orschiro · 2014-01-14 06:07:16

The service file /usr/lib/systemd/system/insync@.service of the Insync synchronisation tool looks as follows:

[Install]
WantedBy=multi-user.target

[Unit]
Description=Insync
After=local-fs.target network.target

[Service]
Type=simple
Environment=DISPLAY=:-0
ExecStart=/usr/bin/insync start
ExecReload=/bin/kill -HUP $MAINPID
KillMode=process
Restart=always
User=%I

[Install]
WantedBy=multi-user.target

When running # systemctl stop insync@<user>.service, systemctl reports that the service has stopped.

Jan 14 07:05:12 thinkpad systemd[1]: Stopped Insync.

However, Insync is still running:

➜  ~  ps aux | grep insync                           
orschiro  2792  0.6  1.7 1046004 139272 ?      Sl   06:36   0:12 ./insync start

The service file looks exactly the same as the Dropbox one for which killing the service on stop is working.

Why does it not work in this case?

Last edited by orschiro (2014-01-18 08:16:05)

WonderWoofy · 2014-01-14 06:11:06

I don't use this Insync at all, but it makes me wonder why there is the need to set KillMode=process. When the service is running, is there more than one process in the service's cgroup? If so, then setting KillMode=process doesn't seem to make much sense.

See the man page for systemd.kill.

orschiro · 2014-01-14 06:13:52

Yes, I think there is. When removing KillMode=process, I get this:

➜  ~  sudo systemctl status insync@orschiro.service 
insync@orschiro.service - Insync
   Loaded: loaded (/usr/lib/systemd/system/insync@.service; disabled)
   Active: active (running) since Tue 2014-01-14 07:12:46 CET; 105ms ago
 Main PID: 8670 (insync)
   CGroup: /system.slice/system-insync.slice/insync@orschiro.service
           ├─8670 /bin/bash /usr/bin/insync start
           ├─8671 ./insync start
           └─8683 ./insync start

Jan 14 07:12:46 thinkpad systemd[1]: insync@orschiro.service holdoff time over, scheduling restart.
Jan 14 07:12:46 thinkpad systemd[1]: Stopping Insync...
Jan 14 07:12:46 thinkpad systemd[1]: Starting Insync...
Jan 14 07:12:46 thinkpad systemd[1]: Started Insync.

WonderWoofy · 2014-01-14 06:15:12

Okay, so you see that there are child processes there. Now go to the man page, and read what KillMode=process does and what you might do to fix it.

orschiro · 2014-01-15 08:22:20

@WonderWoofy

Thanks. I looked into the man pages and guess I have to use KillMode=control-group then. However, the main process still keeps running. Am I correct here that KillMode set in /etc/systemd/system/insync@.service should actually take precedence over the one in /usr/lib?

➜  ~ /etc/systemd/system/insync@.service
.include /usr/lib/systemd/system/insync@.service
[Service]
KillMode=control-group

➜  ~  cat /usr/lib/systemd/system/insync@.service
[Unit]
Description=Insync
After=local-fs.target network.target

[Service]
ExecStartPre=/usr/bin/sleep 60
Environment=DISPLAY=:0
Type=simple
ExecStart=/usr/bin/insync start
ExecReload=/bin/kill -HUP $MAINPID
KillMode=process
User=%I

[Install]
WantedBy=multi-user.target

Jan 15 09:15:16 thinkpad systemd[1]: Stopped Insync.

➜  ~  ps aux | grep insync               
orschiro 26324  1.2  1.6 1111784 136516 ?      Sl   08:57   0:13 ./insync start

orschiro · 2014-01-18 08:15:52

I have managed to come up with a working service file that successfully stops Insync when running systemctl stop insync@<user>.service.

Thanks again for your help.

[Unit]
Description=Insync
After=local-fs.target network.target

[Service]
Environment=DISPLAY=:0
Type=oneshot
RemainAfterExit=yes
ExecStart=/usr/bin/insync start
ExecStop=/usr/bin/insync quit
User=%I

[Install]
WantedBy=multi-user.target

Arch Linux

#1 2014-01-14 06:07:16

[solved] Insync: killing service on systemctl stop not working

#2 2014-01-14 06:11:06

Re: [solved] Insync: killing service on systemctl stop not working

#3 2014-01-14 06:13:52

Re: [solved] Insync: killing service on systemctl stop not working

#4 2014-01-14 06:15:12

Re: [solved] Insync: killing service on systemctl stop not working

#5 2014-01-15 08:22:20

Re: [solved] Insync: killing service on systemctl stop not working

#6 2014-01-18 08:15:52

Re: [solved] Insync: killing service on systemctl stop not working

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