Uninstall Cassandra

$ sudo su

remove cassandra

$ apt-get remove cassandra

cleaned the cassandra folders

$ rm -rf /var/lib/cassandra

$ rm -rf /var/log/cassandra

$ rm -rf /etc/cassandra

Install Cassandra

Add the DataStax Community repository to the /etc/apt/sources.list.d/cassandra.sources.list

$ echo "deb http://debian.datastax.com/community stable main" | sudo tee -a /etc/apt/sources.list.d/cassandra.sources.list

Add the DataStax repository key to your aptitude trusted keys.

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

If the above doesn’t work try:

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

And then

sudo apt-get update and then sudo apt-get install cassandra

Configure and run Cassandra

This is the configuration file cassandra reads at startup

$ sudo vi /etc/cassandra/cassandra.yaml

Change authenticator: AllowAllAuthenticator

to authenticator: PasswordAuthenticator

Bring up cassandra when system boots up

$ sudo update-rc.d cassandra enable

use $ cassandra command to enable the cassandra service

then login with following command and you will be able to add new user and create schema:

cqlsh -u cassandra -p cassandra

Create kespace and user

1. create keyspace rainbowdba with replication = { ‘class‘ : ‘SimpleStrategy‘, ‘replication_factor‘ : 1 };

2. CREATE USER OC_APP_RAINBOWDBA WITH PASSWORD ‘0b6e8c45df68f6f16d1c494c6ba443c0‘;

ALTER USER OC_APP_RAINBOWDBA WITH PASSWORD ‘a3c224d4b89192d2ea3ea943dd7e9648‘; (may change USER to ROLE)

3) Create the schema accordingly

Ubuntu安装Cassandra