First! You need to understand that the server needs at least 4GB of memory. If it is less, then this can lead to instability in the work of Apache Cassandra 3.11.2 on CentOS 7.

Install OpenJDK JRE 8

The latest version of Java 8 is required for Apache Cassandra. To do this, you need to install the latest version of OpenJDK JRE 1.8

sudo yum install -y java-1.8.0-openjdk

Next, you can determine the installation result itself

java -version

A further conclusion would be something like this:

openjdk version "1.8.0_161"
OpenJDK Runtime Environment (build 1.8.0_161-b14)
OpenJDK 64-Bit Server VM (build 25.161-b14, mixed mode)

Install Python 2.7 if it is not on your system

It is Python version 2.7 that is needed since in Python 3 (for example), you may have problems launching the Apache Cassandra cqlsh shell

If for some reason you don’t have one, you can install it using the following command

sudo yum install python -y

Install the latest stable version of Apache Cassandra

To get started, create an Apache Cassandra 3.11.x YUM repo:

cat <<EOF | sudo tee -a /etc/yum.repos.d/cassandra311x.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

Then, install Apache Cassandra 3.11.2 using the above YUM repository:

sudo yum install cassandra -y
sudo systemctl daemon-reload

Verify Apache Cassandra Installation

You need to start the Apache Cassandra daemon:

sudo service cassandra start

Further, if everything is correct, you will receive the following output:

Starting cassandra (via systemctl):                         [  OK  ]

If you want Apache Cassandra to start automatically, then you need to run the following command:

sudo chkconfig cassandra on

You must use the nodetool program to show the status of Apache Cassandra on the current node:

nodetool status

The output will look like this:

Datacenter: datacenter1
=======================
Status=Up/Down
|/ State=Normal/Leaving/Joining/Moving
--  Address    Load       Tokens       Owns (effective)  Host ID                               Rack
UN  127.0.0.1  103.65 KiB  256          100.0%            e977023b-7dd7-4e89-9ee7-aaa4c45df51c  rack1

You can use the cqlsh shell to interact with Apache Cassandra:

cqlsh localhost

The output should look something like this:

Connected to Test Cluster at localhost:9042.
[cqlsh 5.0.1 | Cassandra 3.11.2 | CQL spec 3.4.4 | Native protocol v4]
Use HELP for help.
cqlsh>

Next, type exit and press Enter to exit the cqlsh shell.

To stop Apache Cassandra, run the following command:

sudo service cassandra stop

First! You need to understand that the server needs at least 4GB of memory. If it is less, then this can lead to instability in the work of Apache Cassandra 3.11.2 on Debian 11.

Java installation

In order to use Apache Cassandra correctly and without problems, you should install Java on your server. This can be done using the following command:

apt install openjdk-11-jdk -y

Next, you need to configure the repositories and other dependencies.

apt install apt-transport-https gnupg2 -y

Then you need to add the key. The name commonly used for it is Apache Cassandra GPG (use wget)

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

Then you should add the downloaded repository

sh -c 'echo "deb https://downloads.apache.org/cassandra/debian 40x main" | sudo tee -a /etc/apt/sources.list.d/cassandra.sources.list'

Installing Apache Cassandra

Before installation, we recommend that you update the system

apt-get update

Then you can proceed to install

apt-get install Apache Cassandra

Then you can enable this utility to run every time your system boots

systemctl enable cassandra

After successful installation, we also recommend checking the status of the Apache Cassandra service

systemctl status cassandra

To interact with the Cassandra cluster, you will be able to login with the following simple command:

cqlsh