Install an Apache Cassandra database
3 minute read
Apache Cassandra is required to store data for API Manager (for example, API catalog, quotas, and client registry) or API Gateway client registry (API key and OAuth). In addition, Cassandra is optional to store data for the following API Gateway components:
- Custom KPS table definitions and data
- OAuth token stores
NoteYou must ensure that Cassandra is installed and running to use API Manager or API Gateway client registry.
Supported Cassandra versions
API Gateway supports Apache Cassandra versions 2.2.12, 2.2.19, and 3.11.11. The recommended version is 3.11.11. For more details, see Apache Cassandra documentation.
For details on upgrading your Cassandra version, see Upgrade Apache Cassandra.
Upgrade from earlier API Gateway versions
API Gateway version 7.5.3 and later include the Datastax Cassandra client, which uses a default port of
9042 to communicate with Cassandra over the Cassandra native protocol. Earlier API Gateway versions included the Hector Cassandra client, which used a default port of
9160 to communicate with Cassandra over the Apache Thrift protocol.
In API Gateway version 7.5.1 or later, Cassandra runs externally to the API Gateway process. In earlier API Gateway versions, Cassandra was embedded in the API Gateway process.
For details on upgrading from an earlier API Gateway version, see the API Gateway Upgrade Guide.
This section describes Cassandra-specific prerequisites in addition to the general API Gateway Prerequisites.
Production environment requirements
API Gateway supports the following in a production environment:
- Operating systems:
- All supported Linux platforms
- Cassandra version 3.11.11
- 64-bit OpenJDK JRE or Oracle JRE version 8
For details on requirements for high availability, see Configure a Cassandra HA cluster.
JRE requirements and recommendations
The default API Gateway installation includes a 64-bit OpenJDK JRE (
apigateway/Linux.x86_64/jre/bin). You can configure Cassandra to use the API Gateway JRE (for example, in a demo environment), but it is recommended that you install a separate JRE (OpenJDK or Oracle) for use with Cassandra. When using a separate JRE, use the same version (or at least the same major version) as the API Gateway uses and ensure that the
JAVA_HOME environment variable is set and pointing to the file system location where the JRE is installed.
Cassandra is designed to run on commodity distributed drives, and therefore it is strongly recommended not to use a storage area network (SAN) for Cassandra deployments.
For more information on Cassandra hardware choice recommendations, see Hardware choices.
Install Apache Cassandra
NoteApache Cassandra 3.11.11 is installed by default in an API Gateway standard or Complete setup.
Install Cassandra in GUI mode
In GUI mode, to install Apache Cassandra only, use the steps described in Installation with the following selections:
- Setup Type: Select Custom.
- Select Components: Select Cassandra.
- Cassandra configuration: Enter your Cassandra Installation Directory and your JRE Location.
Install Cassandra in unattended mode
To install Apache Cassandra using the API Gateway installer in unattended mode, follow the steps described in Unattended installation.
The following command is an example of how to install Apache Cassandra in unattended mode on Linux:
./APIGateway_7.7_Install_linux-x86-32_BN<n>.run --mode unattended --setup_type advanced --enable-components cassandra --disable-components apigateway,qstart,policystudio,analytics,configurationstudio,apimgmt,packagedeploytools --cassandraInstalldir /opt/db/cassandra --cassandraJDK /opt/jre --startCassandra 0
Keep Cassandra installation after API Gateway is uninstalled
To keep your Cassandra installation after API Gateway is uninstalled, you must ensure that you first install Cassandra only. For example, perform the following steps:
- Run the API Gateway installer, and select Cassandra only.
- Run the API Gateway installer, and select API Gateway components to install.
If API Gateway is uninstalled, Cassandra remains installed.
For more details on Apache Cassandra, see the following:
Was this page helpful?
Glad to hear it! Please tell us how we can improve.
Sorry to hear that. Please tell us how we can improve.