NoSQL: Install Single Node Cassandra 3.5 on Ubuntu 14.04

Now, I am going to learn and share NoSQL Apache Cassandra practical demonstration.
In the previous series of articles, I shared a basic theory about NoSQL and Apache Cassandra.

In this post, I am providing steps to install Single Node Cassandra Cluster on Ubuntu 14.04.

Step 1:
Cassandra requires Oracle Java Runtime Environment.
Install Oracle Java Virtual Machine.
Add Oracle JRE package.

1	sudo add-apt-repository ppa:webupd8team/java

Step 2:
Update the database package:

1	sudo apt-get update

In the second step, If you get any error like: “unable to lock directory /var/lib/apt/lists/”

Step 2.1: 
Search running apt-get processes:

1	ps -A | grep apt-get

Step 2.2:
If any process is running as apt-get, kill it

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sudo kill -9 [process-id]   --example: /* sudo kill -9 14521 */

Step 3:
Accept the license agreement and install the Oracle JRE.

1	sudo apt-get install oracle-java8-set-default

Step 4:
After successfully installtion, verify JRE Version.

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java -version   --output: /* java version "1.8.0_77" Java(TM) SE Runtime Environment (build 1.8.0_77-b03) Java HotSpot(TM) 64-Bit Server VM (build 25.77-b03, mixed mode) */

Step 5:
Install Cassandra from the official Apache Software Foundation repositories.
The latest tick-tock release is Cassandra 3.5, released on 2016-04-13.
Below commands to add repository source from www.apache.org.
In the below command, you can change the value of 35x version. e.g, for version 3.5 = 35x, for version 2.2 = 22x.

1	echo "deb http://www.apache.org/dist/cassandra/debian 35x main" | sudo tee -a /etc/apt/sources.list.d/cassandra.sources.list

1	echo "deb-src http://www.apache.org/dist/cassandra/debian 35x main" | sudo tee -a /etc/apt/sources.list.d/cassandra.sources.list

Step 6:
Require to add three public key from the Apache Software Foundation.

First key:

1	gpg --keyserver pgp.mit.edu --recv-keys F758CE318D77295D

1	gpg --export --armor F758CE318D77295D | sudo apt-key add -

Second key:

1	gpg --keyserver pgp.mit.edu --recv-keys 2B5C1B00

1	gpg --export --armor 2B5C1B00 | sudo apt-key add -

Third key:

1	gpg --keyserver pgp.mit.edu --recv-keys 0353B12C

1	gpg --export --armor 0353B12C | sudo apt-key add -

Step 7: 
Update the package.

1	sudo apt-get update

Step 8:
Install Cassandra.

1	sudo apt-get install cassandra

Step 9:
Check the status of Cassandra Service.

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sudo service cassandra status   --output: /* * Cassandra is running */

Step 10:
You can also check the status of cluster.
status UN means Up and Normal.

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sudo nodetool status   -- output /* ubuntu@ip-:~$ sudo nodetool status Datacenter: datacenter1 ======================= Status=Up/Down |/ State=Normal/Leaving/Joining/Moving --  Address    Load       Tokens       Owns (effective)  Host ID                               Rack UN  127.0.0.1  110.53 KB  256          100.0%            6e9ccab2-f9c1-40cf-8cb5-abbf95b84342  rack1 */

Step 11:
Now, You can connect Cassandra Query Language command line interface.

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cqlsh