Linux: process into a service

Question

I am trying to make a linux executable as a service

I execute my program like this below

java -jar mytestprogram.jar 

creates a process that runs continuously and serves REST requests. But I want to run it as a service where I can do

service mytestprogram start service mytestprogram stop service mytestprogram status chkconfig mytestprogram on 

etc. What is the most simple way of doing it?

Answer 1

That depends on your system manager

the most common way to do that on debian/ubuntu is to build an initscript and place it in /etc/init.d or /etc/rc/init.d and place a script named mytestprogram in that.

this is an example initscript:

#!/bin/sh ### BEGIN INIT INFO # Provides:          testone # Required-Start:    $local_fs # Required-Stop:     $local_fs # Default-Start:     2 3 4 5 # Default-Stop:      0 1 6 # X-Interactive:     false # Short-Description: Example init script # Description:       Start/stop an example script ### END INIT INFO  DESC="test script" NAME=testone #DAEMON=  do_start() {    echo "starting!"; }  do_stop() {    echo "stopping!" }   case "$1" in    start)      do_start      ;;    stop)      do_stop      ;; esac  exit 0 

I suggest you to look some scripts in that directory, It's simple if you know bash a little ;)

Answer 2

Here is a sample shell script (make sure you replace the MAT name with the name of the your application):

I create one GitHubGist with the latest version of my script and a brief explanation to help those who need it. GitHub Gist link

#!/bin/bash  ### BEGIN INIT INFO # Provides:                 MATH # Required-Start:           $java # Required-Stop:            $java # Short-Description:        Start and stop MATH service. # Description:              - # Date-Creation:            - # Date-Last-Modification:   - # Author:                   - ### END INIT INFO  # Variables PGREP=/usr/bin/pgrep JAVA=/usr/bin/java ZERO=0  # Start the MATH start() {     echo "Starting MATH..."     #Verify if the service is running     $PGREP -f MATH > /dev/null     VERIFIER=$?     if [ $ZERO = $VERIFIER ]     then         echo "The service is already running"     else         #Run the jar file MATH service         $JAVA -jar /opt/MATH/MATH.jar > /dev/null 2>&1 &         #sleep time before the service verification         sleep 10         #Verify if the service is running         $PGREP -f MATH  > /dev/null         VERIFIER=$?         if [ $ZERO = $VERIFIER ]         then             echo "Service was successfully started"         else             echo "Failed to start service"         fi     fi     echo }  # Stop the MATH stop() {     echo "Stopping MATH..."     #Verify if the service is running     $PGREP -f MATH > /dev/null     VERIFIER=$?     if [ $ZERO = $VERIFIER ]     then         #Kill the pid of java with the service name         kill -9 $($PGREP -f MATH)         #Sleep time before the service verification         sleep 10         #Verify if the service is running         $PGREP -f MATH  > /dev/null         VERIFIER=$?         if [ $ZERO = $VERIFIER ]         then             echo "Failed to stop service"         else             echo "Service was successfully stopped"         fi     else         echo "The service is already stopped"     fi     echo }  # Verify the status of MATH status() {     echo "Checking status of MATH..."     #Verify if the service is running     $PGREP -f MATH > /dev/null     VERIFIER=$?     if [ $ZERO = $VERIFIER ]     then         echo "Service is running"     else         echo "Service is stopped"     fi     echo }  # Main logic case "$1" in     start)         start         ;;     stop)         stop         ;;     status)         status         ;;     restart|reload)         stop         start         ;;   *)     echo $"Usage: $0 {start|stop|status|restart|reload}"     exit 1 esac exit 0