I have a service that should run set of applications in background on my Yocto embedded Linux system. I don't like an idea to create a systemd startup script for each app so I just run them from a bash script as following:
The service:
startup.service
[Unit]
Description=applications startup script
After=network.target
[Service]
Type=simple
ExecStart=/opt/somedir/startup.sh
[Install]
WantedBy=multi-user.target
and the script
startup.sh
#!/bin/bash
echo "application startup script"
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/opt/somedir
/opt/somedir/app1 &
/opt/somedir/app2 &
/opt/somedir/app3 &
But no application started. Checking the service status give me:
systemctl status startup
● startup.service - applications startup script
Loaded: loaded (/lib/systemd/system/startup.service; enabled; vendor preset: enabled)
Active: inactive (dead) since Thu 2021-03-25 10:33:16 UTC; 18min ago
Process: 428 ExecStart=/opt/somedir/startup.sh (code=exited, status=0/SUCCESS)
Main PID: 428 (code=exited, status=0/SUCCESS)
Mar 25 10:33:16 systemd[1]: Started application startup script.
Mar 25 10:33:16 startup.sh[428]: application startup script
Mar 25 10:33:16 systemd[1]: startup.service: Succeeded.
So the service executed on the system startup and executes the script. If I execute the script from the command line it starts the applications as expected. So what a reason that no application run?
Systemd will need to know how to run the script. Therefore either add:
#!/bin/bash
to the top line of the startup.sh script or change the ExecStart line in the systemd service file to:
ExecStart=/bin/bash -c /opt/somedir/startup.sh
Also, to ensure that the processes spawned remain persistent after being spawned, change:
Type=forking
systemd runs script startup.sh, and after that process ends, it assumes all is done so it kills off any remaining processes and the unit ends. The simplest solution is to add a wait at the end of startup.sh so that it only returns when the backgrounded processes have all ended.
Related
I am trying to create a Golang server using the gin framework on ubuntu. It works fine when it is executed in the terminal after building it with go build and equally works well locally.
Systemd
Description=goapp
[Service]
Type=simple
Restart=always
RestartSec=5s
ExecStart=/home/.../goapp/main
[Install]
WantedBy=multi-user.target
I got this error
goapp.service - rediate
Loaded: loaded (/lib/systemd/system/goapp.service; disabled; vendor preset: enabled)
Active: activating (auto-restart) (Result: exit-code) since Thu 2022-09-29 08:14:10 UTC; 66ms ago
Process: 21628
ExecStart=/home/.../go/goapp/main (code=exited, status=2)
Main PID: 21628 (code=exited, status=2)
CPU: 9ms
Go is compiled language. You need to build your code into an executable binary file using go build command and then give path to binary file to systemd via ExecStart property in unit file.
See Go Documentation and specifically Compile and install the application section to find out more about how to compile your application.
In your example you have ExecStart=/home/.../goapp/main.go which is telling systemd to run source code file. That file is not executable and understood by operating system so it fails to execute and systemd unit fails because of that.
Adding a working directory to the systemd fix this error.
Description=goapp
[Service]
Type=simple
Restart=always
RestartSec=
WorkingDirectory=/home/.../goapp
ExecStart=/home/.../goapp/main
[Install]
WantedBy=multi-user.target
I've created my own Service with systemd. It is supposed to run a python script once at boot time. It sends an Email with the IP-Address and the Teamviewer id, this is why i have an delay in it, otherwise i get an error that the domain of the Mailserver cant be resolved. The Script should run in the background because of the 30 seconds delay.
The script is located in /usr/bin/glatv.py and is ecexuteable, the script run without an problem. The construct is runnning on an Raspberry Pi4 with Raspian Buster 2020-02-13
The Service is in /etc/systemd/system/ located, is executeable and enabled:
[Unit]
Description=My Own Service
[Service]
Type=oneshot
ExecStart=/usr/bin/glatv.py &
[Install]
WantedBy=reboot.target
But
systemctl start myservice
is working without a Problem
● glatvd.service - My Own Service
Loaded: loaded (/etc/systemd/system/glatvd.service; enabled; vendor preset: enabled)
Active: inactive (dead)
Apr 02 12:52:31 raspberrypi systemd[1]: Starting My Own Service...
Apr 02 12:53:02 raspberrypi systemd[1]: glatvd.service: Succeeded.
Apr 02 12:53:02 raspberrypi systemd[1]: Started My Own service.
after a reboot there is no call or log
Instead of having an arbitrary 30-second delay, add this to your service file:
After=network-online.target
Wants=network-online.target
You should try run this command to make your service enable to run after restart
systemctl enable myservice
and for log, I believe you must put this parameters into your service's config file
StandardOutput=/path/to/info/log/info_log.log
StandardError=/path/to/error/log/error_log.log
Anything I got this reference: How to redirect output of systemd service to a file
I wrote a program (called whisky) which I now want to startup when booting the machine (a Raspberry Pi with which I'm creating an autonomous boat). So I created the file /lib/systemd/system/whisky.service:
[Unit]
Description=Whisky Boat Program
After=network.target
StartLimitIntervalSec=0
[Service]
ExecStart=/home/pi/whisky/run
KillMode=process
IgnoreSIGPIPE=true
Restart=always
RestartSec=3
User=root
Type=simple
[Install]
WantedBy=multi-user.target
I verified the file is correctly formatted for systemd using systemd-analyze verify whisky.service.
When I now run sudo systemctl start whisky I get no output (suggesting no errors).
sudo systemctl status whisky gives me the following output though:
* whisky.service - Whisky Boat Program
Loaded: loaded (/lib/systemd/system/whisky.service; enabled; vendor preset: enabled)
Active: activating (auto-restart) (Result: exit-code) since Fri 2020-03-20 15:03:35 CET; 792ms ago
Process: 8621 ExecStart=/home/pi/whisky/run (code=exited, status=203/EXEC)
Main PID: 8621 (code=exited, status=203/EXEC)
Mar 20 15:03:35 raspberrypi systemd[1]: whisky.service: Unit entered failed state.
Mar 20 15:03:35 raspberrypi systemd[1]: whisky.service: Failed with result 'exit-code'.
The file /home/pi/whisky/run is actually a bash script which in turn starts the program. To check whether systemd even starts that bash script I added a first line to it: mkdir /home/pi/RUNNING_FROM_SYSTEMD. The dir RUNNING_FROM_SYSTEMD is not created though, so it seems systemd doesn't even try to run the file /home/pi/whisky/run.
Does anybody know what I'm doing wrong here?
Check your run script. There should be shebang. If not, add #!/bin/bash at the top of your script and give absolute path like ExecStart=/bin/bash /home/pi/whisky/run
The error message (code=exited, status=203/EXEC) is often seen when the script itself or its interpreter cannot be executed.
Other possible reasons maybe:
wrong path to script
script not executable
no shebang (first line) or wrong path in shebang
internal files in your script might be missing access permissions.
I am trying to start a service named pigpiod.service via systemd. It invokes a script with three commands. The second one is left out. Why is this?
/etc/systemd/system/pigpiod.service:
[Unit]
Description=Starts pigpiod
Before=touchscreen.service
[Service]
ExecStart=/home/sysop/pigpiod.sh
[Install]
WantedBy=multi-user.target
/home/sysop/pigpiod.sh:
#!/bin/sh
touch /home/sysop/before_pigpiod
/usr/bin/pigpiod
touch /home/sysop/after_pigpiod
When restarting the machine the two files get created in /home/sysop/, but pigpiod is not starting.
When starting the service manually via sudo systemctl start pigpiod the same happens.
When running sudo /home/sysop/pigpiod.sh manually pigpiod is actually starting!
This is the output of sudo systemctl status pigpiod -l right after boot:
● pigpiod.service - Starts pigpiod
Loaded: loaded (/etc/systemd/system/pigpiod.service; enabled)
Active: inactive (dead) since Sat 2017-09-16 20:02:03 UTC; 2min 29s ago
Process: 440 ExecStart=/home/sysop/pigpiod.sh (code=exited, status=0/SUCCESS)
Main PID: 440 (code=exited, status=0/SUCCESS)
Sep 16 20:02:02 kivypie systemd[1]: Starting Starts pigpiod...
Sep 16 20:02:02 kivypie systemd[1]: Started Starts pigpiod.
Why is it, that systemd skips the execution of /usr/bin/pigpiod, but manually running the script as root does not?
My system: Raspberry Pi Model 3B, Raspbian GNU/Linux 8 (jessie)
pigpiod forks without the -g option. So use Type = forking or use pigpiod -g
[Unit]
Description=Starts pigpiod
Before=touchscreen.service
[Service]
ExecStart=/home/sysop/pigpiod.sh
Type=forking
[Install]
WantedBy=multi-user.target
I want to run a script at system startup in a Debian 9 box. My script works when run standalone, but fails under systemd.
My script just copies a backup file from a remote server to the local machine:
#!/bin/sh
set -e
/usr/bin/sshpass -p "PASSWORD" /usr/bin/scp -p USER#10.0.0.2:ORIGINPATH/backupserver.zip DESTINATIONPATH/backupserver/
Just for privacy I replaced password, user, and paths above.
I wrote the following systemd service unit:
[Unit]
Description=backup script
[Service]
Type=oneshot
ExecStart=PATH/backup.sh
[Install]
WantedBy=default.target
Then I set permissions for the script:
chmod 744 PATH/backup.sh
And installed the service:
chmod 664 /etc/systemd/system/backup.service
systemctl daemon-reload
systemctl enable backup.service
When I reboot the script fails:
● backup.service - backup script
Loaded: loaded (/etc/systemd/system/backup.service; enabled; vendor preset: enabled)
Active: failed (Result: exit-code) since Sat 2017-05-13 13:39:54 -03; 47min ago
Main PID: 591 (code=exited, status=1/FAILURE)
Result of journalctl -xe:
mai 16 23:34:27 rodrigo-acer systemd[1]: backup.service: Main process exited, code=exited, status=6/NOTCONFIGURED
mai 16 23:34:27 rodrigo-acer systemd[1]: Failed to start backup script.
mai 16 23:34:27 rodrigo-acer systemd[1]: backup.service: Unit entered failed state.
mai 16 23:34:27 rodrigo-acer systemd[1]: backup.service: Failed with result 'exit-code'.
What could be wrong?
Solved guys. There was 2 problems:
1 - I had to change the service unit file to make the service run only after network was up. The unit section was changed to:
[Unit]
Description = World server backup
Wants = network-online.target
After = network.target network-online.target
2 - The root user did not have the remote host added to the known host list, unlike the ordinary user I used to test the script.
Failed with result 'exit-code' you could try this on your last line:
# REQUIRED FOR SYSTEMD: 0 means clean no error
exit 0
You may also need to add:
Type=forking
to the systemd entry similar to: https://serverfault.com/questions/751030/systemd-ignores-return-code-while-starting-service
If your service or script does not fork add a & at the end to run it in the background, and exit with 0 fast. Otherwise it will be like a startup that times out and takes forever / seems like frozen service.