Install Cassandra

Install and setup Cassandra

1. Add the java PPA repository

        sudo add-apt-repository ppa:webupd8team/java

2. Update package lists

         sudo apt-get update

3. Install Oracle java 8

        sudo apt-get install oracle-java8-installer

 
*Note: Change the number 8 to 6 (or 7) in the code to install Java 6 (or 7).

4. Set the default java

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

5. Test your installation

     java -version


It should display something like the following if everything went well

java version "1.8.0_66"
Java(TM) SE Runtime Environment (build 1.8.0_66-b17)
Java HotSpot(TM) 64-Bit Server VM (build 25.66-b17, mixed mode)

6. Set java HOME

         sudo miv /etc/profile.d/oraclejdk.sh

then paste the following config:

        export J2SDKDIR=/usr/lib/jvm/java-8-oracle
        export J2REDIR=/usr/lib/jvm/java-8-oracle/jre
        export PATH=$PATH:/usr/lib/jvm/java-8-oracle/bin:/usr/lib/jvm/java-8-  
           oracle/db/bin:/usr/lib/jvm/java-8-oracle/jre/bin
        export JAVA_HOME=/usr/lib/jvm/java-8-oracle
        export DERBY_HOME=/usr/lib/jvm/java-8-oracle/db

7. Log out the system and log back in. Then run the following command:

        echo $JAVA_HOME


And you should see the following line:

        /usr/lib/jvm/java-8-oracle

8. Install Cassandra and dependencies

Add the Apache repository of Cassandra to /etc/apt/sources.list.d/cassandra.sources.list

    echo "deb http://www.apache.org/dist/cassandra/debian 39x main" | sudo tee -a /etc/apt/sources.list.d/cassandra.sources.list


Replace 36x with the latest version of cassandra. You can check for the latest version here

Add Apache repositories keys

    curl https://www.apache.org/dist/cassandra/KEYS | sudo apt-key add -

Update the repositories:

    sudo apt-get update

If you encounter the following error:

GPG error: http://www.apache.org 36x InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY A278B781FE4B2BDA

Then add the public key A278B781FE4B2BDA as follows

    sudo apt-key adv --keyserver pool.sks-keyservers.net --recv-key A278B781FE4B2BDA

And then repeat sudo apt-get update

Install Cassandra

sudo apt-get install cassandra


Edit the script /etc/cassandra/cassandra-env.sh and search for the following line:

    JVM_OPTS="$JVM_OPTS -Djava.rmi.server.hostname

Uncomment the line and add your local address as the value after the =:

     JVM_OPTS="$JVM_OPTS -Djava.rmi.server.hostname=127.0.0.1"


Also, edit the script /etc/init.d/cassandra and search for this line:

    CMD_PATT="Dcassandra-pidfile=.*cassandra\.pid"

and edit it to look like this:

    CMD_PATT="cassandra"


Then lets restart cassandra after making these changes

    sudo /etc/init.d/cassandra restart

# login into the cassandra client interface:

        cqlsh