Installing DataStax Enterprise with Ansible

You can see in other blogs how to install ansible on Ubuntu, this time it is just shown how to install DSE using Ansible.

REQUIREMENTS:

You need to be registered at Datastax so you could get an user/passwd to get Datastax DSE.

It is assumed that you already have Ansible configured and have a servers group named "dse.

You can follow follow post to install ansible: http://kozlex.blogspot.mx/2013/04/installing-and-executing-ansible-on.html


Do a quick test:


$ ansible dse -m ping -u ubuntu
10.40.207.50 | success >> {
    "changed": false,
    "ping": "pong"
}

To install DSE on ubuntu, we need to make sure that:

- JNA is installed

- Oracle java6 is installed

- You have a Datastax user/password. Get it from: http://www.datastax.com/download/register

Installing JNA:

ansible dse -a "sudo apt-get install libjna-java" -u ubuntu -y

Installing Java6 on Ubuntu 12.04 x64:

First enable non-interctive mode

# echo debconf shared/accepted-oracle-license-v1-1 seen true | sudo debconf-set-selections

# echo debconf shared/accepted-oracle-license-v1-1 select true | sudo debconf-set-selections

Install Java:

# sudo apt-get install oracle-java6-installer -y

make sure java is running:

# java -version
java version "1.6.0_45"
Java(TM) SE Runtime Environment (build 1.6.0_45-b06)
Java HotSpot(TM) 64-Bit Server VM (build 20.45-b01, mixed mode)

1. Add to sources list datastax repository with your user/passwd and install dse:

# deb http://your.user.name_company.com:dRteasd34DW@debian.datastax.com/enterprise stable main

curl -L http://debian.datastax.com/debian/repo_key | sudo apt-key add -

# sudo apt-get update

# sudo apt-get install dse-full -y

Enable Solr and Hadoop at SDE

To enable Solr and Hadoop follow variables need to be set to ‘1’ at /etc/default/dse config file:

HADOOP_ENABLED=1

SOLR_ENABLED=1

Start Datastax Enterprise.

Start the service with:

# sudo dse cassandra -s

2. Open new terminal and verify DSE is running and operational.

# sudo dsetool ring -h localhost

Output should look similar to the example below:

Address         DC          Rack        Status State   Load            Owns                Token

127.0.0.1       Solr        rack1       Up     Normal  9.29 MB         100.00%             33015982249869676890

# sudo /etc/init.d/dse stop

2.  To verify that the cluster node is up and running execute:

# nodetool ring -h localhost

Note: Ownership information does not include topology, please specify a keyspace.

Address         DC          Rack        Status State   Load            Owns                Token                                       

127.0.0.1       Analytics   rack1       Up     Normal  4.38 MB         100.00%             42053256256062917965909574476650479427      

#

You can issue hadoop commands to make sure that it is working correctly:

# dse hadoop fs -mkdir my_test_dir

# dse hadoop fs -ls

Found 1 item

drwxrwxrwx   - root root          0 2013-04-23 16:56 /user/root/my_test_dir

#

If the directory created is listed then hadoop service works!

If you want to verify Hadoop deeper you can follow Hadoop demos:

http://www.datastax.com/docs/datastax_enterprise3.0/solutions/about_hadoop

Enjoy!
P.S. You can see the flags of there world!