How to Install Apache Cassandra on Ubuntu 17.04 and CentOS 7?

Apache Cassandra is an open source NoSQL database. It can store and manage large data sets across many servers. It offers high availability and fault tolerance. This step-by-step guide will show you how to install Apache Cassandra on Ubuntu 17.04 and CentOS 7.

Prerequisites

• A server running Ubuntu 17.04 or CentOS 7
• A user with sudo or root access
• Internet connection
• Basic Linux command-line skills

Installing Apache Cassandra on Ubuntu 17.04

Follow these steps to install Cassandra on an Ubuntu 17.04 server.

1. Update package lists

sudo apt-get update

2. Install Java 8

sudo apt-get install -y openjdk-8-jdk

3. Add the Cassandra repository

echo "deb https://www.apache.org/dist/cassandra/debian 311x main" | sudo tee /etc/apt/sources.list.d/cassandra.list

4. Import the repository key

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

5. Install Apache Cassandra

sudo apt-get update

sudo apt-get install -y cassandra

6. Enable and start Cassandra

sudo systemctl enable cassandra

sudo systemctl start cassandra

7. Verify the service

sudo systemctl status cassandra

nodetool status

Installing Apache Cassandra on CentOS 7

Use these commands to install Cassandra on a CentOS 7 server.

1. Install Java 8

sudo yum install -y java-1.8.0-openjdk-devel

2. Add the Cassandra repository

cat <<EOF | sudo tee /etc/yum.repos.d/cassandra.repo
[cassandra]
name=Apache Cassandra
baseurl=https://www.apache.org/dist/cassandra/redhat/311x/
gpgcheck=1
repo_gpgcheck=1
gpgkey=https://www.apache.org/dist/cassandra/KEYS
EOF

3. Install Apache Cassandra

sudo yum install -y cassandra

4. Enable and start Cassandra

sudo systemctl enable cassandra

sudo systemctl start cassandra

5. Verify the service

sudo systemctl status cassandra

nodetool status

Post-Installation Steps

After installation, you can connect to Cassandra with cqlsh:

cqlsh

You can change settings by editing /etc/cassandra/cassandra.yaml. Then restart Cassandra:

sudo systemctl restart cassandra

Conclusion

You have installed Apache Cassandra on Ubuntu 17.04 and CentOS 7. You are now ready to create keyspaces, tables, and manage your data. For more details, visit the Cassandra documentation.