Configure and Start Apache Storm

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	Note
	The `su` commands in this section use "zookeeper" to represent the ZooKeeper Service user. If you are using another name for your ZooKeeper Service user, you will need to substitute your ZooKeeper Service user name for "zookeeper" in each of the `su` commands.

Apache Storm is fairly independent of changes to the HDP cluster, but you must upgrade Storm for rolling upgrade support in HDP 2.3.0 and be on the latest version of Storm.

After upgrading Storm, replace your configuration. Copy /etc/storm/conf from the template to the conf directory .
Replace your ZooKeeper configuration after upgrading. Replace the ZooKeeper template configuration in /etc/zookeeper/conf.
Ensure ZooKeeper is running. On the storm node, run the following command:
```
su - zookeeper -c "source /etc/zookeeper/conf/zookeeper-env.sh; export ZOOCFGDIR=/etc/zookeeper/conf; /usr/hdp/current/zookeeper-server/bin/zkServer.sh start >> $ZOO_LOG_DIR/zoo.out\"
```
where
- $ZOO_LOG_DIR is the directory where ZooKeeper server logs are stored. For example, /var/log/zookeeper.
Start nimbus, then supervisor/ui/drpc/logviewer:
/usr/hdp/current/storm-nimbus/bin/storm nimbus.
Start Storm, using a process controller, such as supervisor:
su - storm /usr/hdp/current/storm-supervisor/bin/storm supervisor
You can use the same command syntax to start Storm using nimbus/ui and logviewer.
su - storm /usr/hdp/current/storm-supervisor/bin/storm nimbus
su - storm /usr/hdp/current/storm-supervisor/bin/storm ui
su - storm /usr/hdp/current/storm-supervisor/bin/storm logviewer
su - storm /usr/hdp/current/storm-supervisor/bin/storm drpc

​Configure and Start Apache Storm