Installing DataStax Enterprise 5.1 on Debian-based systems using APT

Learn how to install DataStax Enterprise 5.1 on Debian-based systems using APT.

Some things to know about installing DSE

When installed with APT, DataStax Enterprise 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 DataStax Enterprise 5.1 and the DataStax Agent (for use with DSE OpsCenter). It does not install DSE OpsCenter, DataStax Studio, or Graph Loader.
If using DSE OpsCenter 6.0, override the default DataStax Agent. However, DSE OpsCenter 6.8 is recommended. See DSE product compatibility. After installation:
```
sudo apt-get install datastax-agent-6.0.supported_version-1
```
To install the agent during installation, add datastax-agent-6.0.supported_version-1 to the installation command in 5.

SECURITY RISK

When DSE is installed, it creates a superuser called cassandra in the database and runs as this user. It also creates this same superuser in the operating system. Do not use the cassandra superuser in production. Using the cassandra superuser is a security risk. See Adding a superuser login.

For more information about managing Java, see Managing Java installs.

Prerequisites

Root or sudo access.
A supported platform.
Aptitude Package Management (APT) 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_151 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)
Python 3.8 through 3.11, or Python 2.7.x. Each listed version provides support for cqlsh, but DataStax recommends using Python 3.11.

Hardware requirements

See Recommended production settings.

Install DSE on Debian-based systems using APT

Verify that a required version of Java is installed:

java -version

DataStax recommends the latest build of a Technology Compatibility Kit (TCK) Certified OpenJDK version 8.

If OpenJDK, the results should look like:

openjdk version "1.8.0_171"
OpenJDK Runtime Environment (build 1.8.0_171-8u171-b11-0ubuntu0.16.04.1-b11)
OpenJDK 64-Bit Server VM (build 25.171-b11, mixed mode)

If Oracle Java, the results should look like:

java version "1.8.0_181"
Java(TM) SE Runtime Environment (build 1.8.0_181-b13)
Java HotSpot(TM) 64-Bit Server VM (build 25.181-b13, mixed mode)

If not OpenJDK 8 or Oracle Java 8, see Install the Java Virtual Machine.

Find DSE 5.1 on IBM Fix Central:
1. Go to Fix Central.
2. In the Product selector field, begin typing IBM DataStax Enterprise, and then select that option from the menu.
3. In the Release field, select the version that you want to install.
4. Click Continue.
5. On the Identify fixes page, click Continue to use the default Browse for fixes option.
6. On the Select fixes page, select the fix pack (DSE version) you want to install, and then click Continue.
  
  Depending on the product and version, more fix packs might be available if you set the Platform filter to All, and then click Submit.
7. If prompted, sign in with your IBMid.
  
  An IBMid account with MFA enabled is required. If you don’t have one, create an IBMid account. If your organization uses Enterprise Federation (EF) for authentication with corporate credentials, see the IBMid EF documentation.
8. On the Download options page, select Download using your browser (HTTPS), and then click Continue.
9. Review the terms and conditions, and then click I agree to activate the download links.
Click the DSE DEB package link to download the file, for example, dse-5.1.48-deb.zip.
Extract the DEB files from the .zip file:
```
unzip dse-5.1.48-deb.zip
```
You can use the package signing public key (dse-deb-signing.pub.key) in the file to set up and verify the DEB packages.
Set up a local APT repository to host the downloaded DSE Debian package.

For more information, see Setting up a Debian repository.
Add a DataStax repository file called /etc/apt/sources.list.d/datastax.sources.list:
```
echo "deb [trusted=yes] file:**REPOSITORY_DIRECTORY** ./" | sudo tee -a /etc/apt/sources.list.d/datastax.sources.list
```
Replace REPOSITORY_DIRECTORY with the path to the repository directory.

The [trusted=yes] option allows APT to use the repository without GPG key verification.
Update the packages:
```
sudo apt-get update
```

Install the DSE packages:

Specify all packages; otherwise, the installation fails.

Install the latest version of DSE (5.1.x):
```
sudo apt-get install dse-full
```

Install an earlier version of DSE 5.1.x:

sudo apt-get install dse=version_number-1 \
    dse-full=version_number-1 \
    dse-libcassandra=version_number-1 \
    dse-libgraph=version_number-1 \
    dse-libhadoop2-client-native=version_number-1 \
    dse-libhadoop2-client=version_number-1 \
    dse-liblog4j=version_number-1 \
    dse-libsolr=version_number-1 \
    dse-libspark=version_number-1 \
    dse-libtomcat=version_number-1

For example:

Specify all packages; otherwise, the installation fails.

sudo apt-get install dse=5.1.48-1 \
    dse-full=5.1.48-1 \
    dse-libcassandra=5.1.48-1 \
    dse-libgraph=5.1.48-1 \
    dse-libhadoop2-client-native=5.1.48-1 \
    dse-libhadoop2-client=5.1.48-1 \
    dse-liblog4j=5.1.48-1 \
    dse-libsolr=5.1.48-1 \
    dse-libspark=5.1.48-1 \
    dse-libtomcat=5.1.48-1

Optional: Install the demos:

Installing the DSE demos is not recommended for production. Only install the demos in development environments to run tutorials.

sudo apt-get install dse-demos=version_number-1

Result

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.
Next Steps below provides links to related tasks and information.

Single-node cluster installations only:

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

Verify that DSE is running:

nodetool status

Review the output to verify that DSE is running:

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 Creating superuser accounts.
Configuring DataStax Enterprise- Settings for DSE Advanced Security, In-Memory, DSE Advanced Replication, DSE Multi-Instance, DSE Tiered Storage, and more.
Configuration and log file locations - Services and package installations.
Configuration and log file locations - No Services and tarball installations.
Changing logging locations after installation.
Starting and stopping DataStax Enterprise.
Preparing DataStax Enterprise for production.
Recommended production settings.