Installing as a Linux Service

WSO2 Carbon and any Carbon-based product can be run as a Linux service as described in the following sections:

Prerequisites

Install JDK and set up the JAVA_HOME environment variable. For more information, see Prerequisites.

Setting up CARBON_HOME

Extract the WSO2 product that you want to run as a Linux service and set the environment variable CARBON_HOME to the extracted product directory location.

Running the product as a Linux service

1. To run the product as a service, create a startup script and add it to the boot sequence. The basic structure of the startup script has three parts (i.e., start, stop and restart) as follows:

   #!/bin/bash
    
   case “$1″ in
   start)
      echo “Starting Service”
   ;;
   stop)
      echo “Stopping Service”
   ;;
   restart)
      echo “Restarting Service”
   ;;
   *)
      echo $”Usage: $0 {start|stop|restart}”
   exit 1
   esac

   For example, given below is a startup script written for WSO2 Application Server 5.2.0:

   #! /bin/sh
   export JAVA_HOME="/usr/lib/jvm/jdk1.7.0_07"
   
   startcmd='/opt/WSO2/wso2as-5.2.0/bin/wso2server.sh start > /dev/null &'
   restartcmd='/opt/WSO2/wso2as-5.2.0/bin/wso2server.sh restart > /dev/null &'
   stopcmd='/opt/WSO2/wso2as-5.2.0/bin/wso2server.sh stop > /dev/null &'
   
   case "$1" in
   start)
      echo "Starting WSO2 Application Server ..."
      su -c "${startcmd}" user1
   ;;
   restart)
      echo "Re-starting WSO2 Application Server ..."
      su -c "${restartcmd}" user1
   ;;
   stop)
      echo "Stopping WSO2 Application Server ..."
      su -c "${stopcmd}" user1
   ;;
   *)
      echo "Usage: $0 {start|stop|restart}"
   exit 1
   esac

   In the above script, the server is started as a user by the name user1 rather than the root user. For example, su -c "${startcmd}" user1 

2. Add the script to /etc/init.d/ directory.
   

   If you want to keep the scripts in a location other than /etc/init.d/ folder, you can add a symbolic link to the script in /etc/init.d/ and keep the actual script in a separate location. Say your script name is appserver and it is in /opt/WSO2/ folder, then the commands for adding a link to /etc/init.d/ is as follows:

   • Make executable : sudo chmod a+x /opt/WSO2/appserver

   • Add a link to /etc/init.d/ : sudo ln -snf /opt/WSO2/appserver /etc/init.d/appserver

3. Install the startup script to respective runlevels using the command update-rc.d. For example, give the following command for the sample script shown in step1:
   

   sudo update-rc.d appserver defaults 

   
   The defaults option in the above command makes the service to start in runlevels 2,3,4 and 5 and to stop in runlevels 0,1 and 6.

   A runlevel is a mode of operation in Linux (or any Unix-style operating system). There are several runlevels in a Linux server and each of these runlevels is represented by a single digit integer. Each runlevel designates a different system configuration and allows access to a different combination of processes.
   

4. You can now st art, stop and restart the server using service <service name> {start|stop|restart} command. You will be prompted for the password of the user (or root) who was used to start the service.