If you want to use WSO2 security model with Cassandra cluster here I'll show you, how you can setup a cassandra cluster using wso2 carbon.
First you need to download wso2 carbon (I am using version 3.2.2)
Then install cassandra feature by using the p2 repository from http://dist.wso2.org/p2/carbon/releases/3.2.2/ to wso2 carbon server.
This will install Cassandra 0.7 version to your carbon server.
Adding p2 repository (http://dist.wso2.org/p2/carbon/releases/3.2.2/)
Installing Cassandra 3.2.2 feature
After finishing the installation restart the carbon server. Now carbon server will work as your Cassandra server.
setup few more cassandra nodes using wso2 carbon as above according to your requirement.
You can follow the instruction given by this site for setting up the cassandra cluster.
The cassandra.yaml configuration file is located in $wso2carbon_home/repository/conf/advanced/ directory.
Add following configuration file (cassandra-auth.xml) $wso2carbon_home/repository/conf/advanced/ in order to view keyspaces using Cassandra Keyspaces ui (change the username and password accordingly).
Cassandra Keyspaces ui
Once you finish the configuration. You can check the status of the cluster by using Cassandra cluster ui or else You can use nodetool comes with Apache Cassandra to monitor the cluster.
Cassandra cluster monitor ui
Address Status State Load Owns Token
192.168.0.100 Up Normal 20.36 MB 33.33% 0
192.168.0.101 Up Normal 251.64 MB 33.33% 56713727820156410577229101238628035242
192.168.0.102 Up Normal 20.95 MB 33.33% 113427455640312821154458202477256070485