creating service in ubuntu 12.04

gistfile1.txt

// origin : askubuntu.com (http://askubuntu.com/questions/351879/how-to-create-a-service-on-ubuntu-lts-12-04)
// about upstart manual : http://upstart.ubuntu.com/cookbook

Upstart scripts have to placed at /etc/init, ending with .conf.

Basically they require 2 sessions: one to indicate when to start, and another with the command to exec.

The easiest script to start with your sample is:

# myprogram.conf
start on filesystem
exec /usr/bin/java -jar /path_to/program
Of course, created as root under /etc/init/myprogram.conf.

If your script requires more than one command line, use the script section:

# myprogram.conf
start on filesystem
script
    /usr/bin/java -jar /path_to/program
    echo "Another command"
end script
To enable bash complete for your service, add a symlink into /etc/init.d folder:

sudo ln -s /etc/init/myprogram.conf /etc/init.d/myprogram
Then try start and stop it:

sudo service myprogram start
Of course, if you read the upstart cookbook, you can create pre-start/post-start and pre-stop/post-stop commands to be executed.

And, additionally, I read you want to check if a process is running. Check this question and maybe use the pre-start section.

example for java

create sh file in the same as jar file

test.sh
cd /dir/to/file/
java -jar utilApp.jar

if you want to restart automatically when it crashes

/etc/init/yourservice.conf

Restart the process if it dies with a signal

or exit code not given by the 'normal exit' stanza.

respawn

Give up if restart occurs 10 times in 90 seconds.

respawn limit 10 90