Configuring Storm for Supervision

If you are deploying a production cluster with Storm, you should configure the Storm components to operate under supervision.

1. Stop all Storm components.
   1. Using Ambari Web, browse to Services > Storm > Service Actions.
   2. Choose Stop, and wait until the Storm service completes.
2. Stop Ambari Server:

   ambari-server stop

3. Change the Supervisor and Nimbus command scripts in the Stack definition. On Ambari Server host, run:

   sed -ir "s/scripts\/supervisor.py/scripts\/supervisor_prod.py/g" /var/lib/ambari-server/resources/common-services/STORM/0.9.1.2.1/metainfo.xml
   
   sed -ir "s/scripts\/nimbus.py/scripts\/nimbus_prod.py/g" /var/lib/ambari-server/resources/common-services/STORM/0.9.1.2.1/metainfo.xml

4. Install supervisord on all Nimbus and Supervisor hosts.
   1. Install EPEL repository:

      yum install epel-release -y

   2. Install supervisor package for supervisord:

      yum install supervisor -y

   3. Enable supervisord on autostart:

      chkconfig supervisord on

   4. Change supervisord configuration file permissions:

      chmod 600 /etc/supervisord.conf

5. Configure supervisord to supervise Nimbus Server and Supervisors by appending the following to /etc/supervisord.conf on all Supervisor host and Nimbus hosts:

   [program:storm-nimbus]
   command=env PATH=$PATH:/bin:/usr/bin/:/usr/jdk64/jdk1.7.0_67/bin/ JAVA_HOME=/usr/jdk64/jdk1.7.0_67 /usr/hdp/current/storm-nimbus/bin/storm nimbus
   user=storm
   autostart=true
   autorestart=true
   startsecs=10
   startretries=999
   log_stdout=true
   log_stderr=true
   logfile=/var/log/storm/nimbus.out
   logfile_maxbytes=20MB
   logfile_backups=10
   
   [program:storm-supervisor]
   command=env PATH=$PATH:/bin:/usr/bin/:/usr/jdk64/jdk1.7.0_67/bin/ JAVA_HOME=/usr/jdk64/jdk1.7.0_67 /usr/hdp/current/storm-supervisor/bin/storm supervisor
   user=storm
   autostart=true
   autorestart=true
   startsecs=10
   startretries=999
   log_stdout=true
   log_stderr=true
   logfile=/var/log/storm/supervisor.out
   logfile_maxbytes=20MB
   logfile_backups=10

   	Note
   	Change /usr/jdk64/jdk1.7.0_67 to the location of the JDK being used by Ambari in your environment.

6. Start supervisord on all Supervisor and Nimbus hosts:

   service supervisord start

7. Start Ambari Server:

   ambari-server start

8. Start all other Storm components:
   1. Using Ambari Web, browse to Services > Storm > Service Actions.
   2. Choose Start.