Apache Storm installation

Now let's look at how to install the Apache Storm framework on your machine. /b10>Here are three steps -

• Install Java on the system if you haven't.
• Install the ZooKeeper framework.
• Install the Apache Storm framework.

Step 1 - Verify the Java installation

Use the following commands to check if Java is installed on the system.

$ java -version

If Java already exists, you'll see its version number. Otherwise, download the latest version of JDK.

Step 1.1 - Download JDK

Use the link below - www.oracle.com download the latest version of JDK

The latest version is JDK 8u 60 and the file is "jdk-8u60-linux-x64.tar.gz". Download the file on your machine.

Step 1.2 - Unziw the file

Usually files are downloaded to the download folder. Use the following command to unzip the tar settings.

$ cd /go/to/download/path
$ tar -zxf jdk-8u60-linux-x64.gz

Step 1.3 - Move to the opt folder

To make Java available to all users, move the extracted Java content to the "/usr/local/java" folder.

$ su
password: (type password of root user)
$ mkdir /opt/jdk
$ mv jdk-1.8.0_60 /opt/jdk/

Step 1.4 - Set the path

To set the path JAVA_HOME variables, add the following command to the .bashrc file.

export JAVA_HOME =/usr/jdk/jdk-1.8.0_60
export PATH=$PATH:$JAVA_HOME/bin

All changes are now applied to the currently running system.

$ source ~/.bashrc

Step 1.5 - Java alternative

Use the following command to change the Java override.

update-alternatives --install /usr/bin/java java /opt/jdk/jdk1.8.0_60/bin/java 100

1.6 steps

Now verify the Java installation with the verification command (java -version) explained in Step 1.

Step 2 - ZooKeeper Frame Installation

Step 2.1 - Download ZooKeeper

To install the ZooKeeper framework on your computer, visit the link below and download the latest version of the ZooKeeper http://zookeeper.apache.org/releases.html

So far, the latest version of ZooKeeper is 3.4.6 (ZooKeeper-3.4.6.tar.gz).

Step 2.2 - Unziw the tar file

Use the following command to unzim the tar file -

$ cd opt/
$ tar -zxf zookeeper-3.4.6.tar.gz
$ cd zookeeper-3.4.6
$ mkdir data

Step 2.3 - Create a profile

Use the command "vi conf/ zoo.cfg open a profile named "conf/zoo.cfg" and set all of the following parameters as a starting point.

$ vi conf/zoo.cfg
tickTime=2000
dataDir=/path/to/zookeeper/data
clientPort=2181
initLimit=5
syncLimit=2

After the profile is saved successfully, you can start the ZooKeeper server.

Step 2.4 - Start the ZooKeeper server

Use the following command to start the ZooKeeper server.

$ bin/zkServer.sh start

After executing this command, you will receive a response as follows -

$ JMX enabled by default
$ Using config: /Users/../zookeeper-3.4.6/bin/../conf/zoo.cfg
$ Starting zookeeper ... STARTED

Step 2.5 - Start the CLI

Use the following command to start the CLI.

$ bin/zkCli.sh

After you execute the above command, you will connect to the ZooKeeper server and get the following response.

Connecting to localhost:2181
................
................
................
Welcome to ZooKeeper!
................
................
WATCHER::
WatchedEvent state:SyncConnected type: None path:null
[zk: localhost:2181(CONNECTED) 0]

Step 2.6 - Stop the ZooKeeper server

After connecting the server and doing everything, you can use the following command to stop the ZooKeeper server.

bin/zkServer.sh stop

You have successfully installed Java and ZooKeeper on your computer. Now let's look at the steps to install the Apache Storm framework.

Step 3 - Apache Storm Frame Installation

Step 3.1 - Download Storm

To install the Storm framework on your computer, visit the link below and download the latest version of http://storm.apache.org/downloads.html

So far, the latest version of Storm is "apache-storm-0.9.5 .tar.gz".

Step 3.2 - Unzip the tar file

Use the following command to unzip the tar file

$ cd opt/
$ tar -zxf apache-storm-0.9.5.tar.gz
$ cd apache-storm-0.9.5
$ mkdir data

Step 3.3 - Open the profile

The current version of Storm contains a file configuring storm daemons in "conf/storm.yaml". Add the following information to the file.

$ vi conf/storm.yaml
storm.zookeeper.servers:
 - "localhost"
storm.local.dir: “/path/to/storm/data(any path)”
nimbus.host: "localhost"
supervisor.slots.ports:
 - 6700
 - 6701
 - 6702
 - 6703

After all changes have been applied, save and return to the terminal.

Step 3.4 - Start Nimbus

$ bin/storm nimbus

Step 3.5 - Start Supervisor

$ bin/storm supervisor

Step 3.6 - Start the UI

$ bin/storm ui

After you start the Storm user interface application, type URL http:// localhost:8080 in your favorite browser and you can see the Storm cluster information and the topology it is running. The page should look similar to the following screenshot.