question Re: How to install some of the dependencies prior to start the custom service(just one time) in Archives of Support Questions (Read Only)

How to install some of the dependencies prior to start the custom service(just one time)

ashutosh_0507 — Thu, 07 May 2015 05:35:35 GMT

Hello All, I am building a custom Service using CSD. I want to install some of the dependencies prior to start the service(just one time) for. example installation of drivers, starting database servers etc. . I am doing that by calling a shell script prior to exec. But the problem is whenever there is a call to start to the service all the pre strart process run again. How can i achieve this.

#!/bin/bash
CMD=$1

case $CMD in
  (start)
    echo "Starting the MyApp Service"

        cp -r  /opt/cloudera/parcels/myapp-2.1 /opt/
       
        chmod 777 -R /opt/myapp-2.1/
        sh /opt/myapp-2.1/resource/scripts/installer/MainScript
        exec python -m SimpleHTTPServer 8080
    	;;
  (stop)
   	sh /opt/myapp-2.1/resource/scripts/installer/StopAll
   	;;
  (restart)
   	sh /opt/myapp-2.1/resource/scripts/installer/RestartAll
   	;;

  (*)
    	echo "Don't understand [$CMD]"
    	;;
esac

Re: How to install some of the dependencies prior to start the custom service(just one time)

Darren — Fri, 08 May 2015 01:04:24 GMT

Create an initialization command and reference it in your SDL in serviceInit (see https://github.com/cloudera/cm_ext/wiki/Service-Descriptor-Language-Reference#serviceinit).

Move all of your one-time initialization logic to that command.

Re: How to install some of the dependencies prior to start the custom service(just one time)

ashutosh_0507 — Wed, 13 May 2015 10:57:10 GMT

Thanks for the reply. dlo.

It works.