Install DataStax Enterprise 6.8 on RHEL-based systems using Yum

To install DataStax Enterprise (DSE) on SUSE, use the binary tarball installation.

Some things to know about installing DataStax Enterprise

These instructions apply to all versions of DSE 6.8. For specific changes see the DSE 6.8 release notes .
When installed from a package (Yum or APT), DSE runs as a service. The service initialization script is located in /etc/init.d/dse. Run levels are not set by the package.
This procedure installs DSE 6.8 and the DataStax Agent. It does not install OpsCenter, DataStax Studio, or DataStax Bulk Loader.
When connecting to DSE 6.8 from OpsCenter, use version OpsCenter 6.8; earlier versions are not supported.

When DSE is installed, it creates a cassandra user in the database. Do not use the cassandra user in production. Failing to do so is a security risk. See Adding a superuser login.

Prerequisites

Root or sudo access.
A supported platform.
Yum Package Management application.
Configure your operating system to use the latest version of Java 8:
- Recommended. The latest build of a TCK (Technology Compatibility Kit) Certified OpenJDK version 8. For example, OpenJDK 8 (1.8.0_242 minimum). DataStax’s recommendation changed due to the end of public updates for Oracle JRE/JDK 8. See Oracle Java SE Support Roadmap.
- Supported. Oracle Java SE 8 (JRE or JDK) (1.8.0_151 minimum)
RedHat-compatible distributions require EPEL (Extra Packages for Enterprise Linux).
Python 3.8-3.11 required for running cqlsh.

Use OpsCenter Lifecycle Manager to automatically manage Java and JCE installs for DSE clusters. For more information about choosing a Java vendor, see Choosing a Java vendor in Lifecycle Manager.

Hardware requirements

See Recommended production settings.

Procedure

In a terminal window:

Verify that a required version of Java is installed:
```
java -version
```
If OpenJDK, the results should look like:
```
openjdk version "1.8.0_242"
OpenJDK Runtime Environment (build 1.8.0_242-b09)
OpenJDK 64-Bit Server VM (build 25.242-b09, mixed mode)
```
If Oracle Java, the results should look like:
```
java version "1.8.0_241"
Java(TM) SE Runtime Environment (build 1.8.0_241-b13)
Java HotSpot(TM) 64-Bit Server VM (build 25.241-b13, mixed mode)
```
If not OpenJDK 8 or Oracle Java 8, see Install the Java Virtual Machine. DataStax recommends the latest build of a Technology Compatibility Kit (TCK) Certified OpenJDK version 8.
Install the libaio package. For example:
```
sudo yum install libaio
```
Add the DataStax Yum repository to a file called /etc/yum.repos.d/datastax.repo:

Set the gpgcheck=1 to perform a GPG signature check.
```
[datastax]
name={company} Repo for DSE
baseurl=https://rpm.datastax.com/enterprise/
enabled=1
gpgcheck=0
```
If you have enabled signature verification (gpgcheck=1), import the DSE repository key:
```
sudo rpm --import https://rpm.datastax.com/rpm/repo_key
```

Install the DSE packages:

Specify all packages; otherwise, the installation fails.

Install the latest version (6.8.x):
```
sudo yum install dse-full
```

Install an earlier 6.8.x version:

sudo yum install dse-6.8.version_number-1 \
    dse-full-6.8.version_number-1 \
    dse-libgraph-6.8.version_number-1 \
    dse-libcassandra-6.8.version_number-1 \
    dse-libhadoop2-client-6.8.version_number-1 \
    dse-libsolr-6.8.version_number-1 \
    dse-libtomcat-6.8.version_number-1 \
    dse-liblog4j-6.8.version_number-1 \
    dse-libspark-6.8.version_number-1

For example:

sudo yum install dse-6.8.0-1 \
    dse-full-6.8.0-1 \
    dse-libgraph-6.8.0-1 \
    dse-libcassandra-6.8.0-1 \
    dse-libhadoop2-client-6.8.0-1 \
    dse-libsolr-6.8.0-1 \
    dse-libtomcat-6.8.0-1 \
    dse-liblog4j-6.8.0-1 \
    dse-libspark-6.8.0-1

Optional: Install the demos:

Installing the DSE demos is not recommended for production. Only install the demos in development environments to run tutorials.
```
sudo yum install dse-demos-version_number-1
```

Optional: Configure systemd units in RedHat systemd configuration.

DSE is ready for additional configuration:

For production, be sure to change the cassandra user. Failing to do so is a security risk. See Adding a superuser login.
DSE provides several types of workloads (default is transactional). See startup options for service or stand-alone installations.
The Next steps section provides links to related tasks and information.

Start DSE

For single-node cluster installations only:

Start DSE:
```
sudo service dse start
```

Verify that DSE is running:

nodetool status

Datacenter: Cassandra
=====================
Status=Up/Down
|/ State=Normal/Leaving/Joining/Moving
--  Address    Load       Tokens  Owns    Host ID                               Rack
UN  127.0.0.1  82.43 KB   128     ?       40725dc8-7843-43ae-9c98-7c532b1f517e  rack1

Next steps

You must change or delete the cassandra user created on installation. See Adding a superuser login.
Configure startup options: service or stand-alone.
If performing an upgrade, go to the next step in the Upgrade Guide.
Configuring DataStax Enterprise (DSE) - Settings for DSE Advanced Security, DSE In-Memory, DSE Advanced Replication, DSE Multi-Instance, DSE Tiered Storage, and more.
Default file locations for package installations
Default file locations for tarball installations
Changing logging locations after installation.
Starting and stopping DataStax Enterprise (DSE).
Preparing DataStax Enterprise (DSE) for production.
Recommended production settings.
Planning and testing DataStax Enterprise (DSE) cluster deployments.
Configuring the heap dump directory to avoid server crashes.
DataStax Studio documentation.
Installing DSE-compatible drivers.