Active-Active databases on Docs

Prepare participating clusters

Mon, 01 Jan 0001 00:00:00 +0000

Prepare participating clusters

Before you prepare your clusters to participate in an Active-Active database, make sure you've completed all the following steps and have gathered the information listed below each step.

Create Active-Active database (REAADB)

Mon, 01 Jan 0001 00:00:00 +0000

Prerequisites

To create an Active-Active database, make sure you've completed all the following steps and have gathered the information listed below each step.

Edit participating clusters for Active-Active database

Mon, 01 Jan 0001 00:00:00 +0000

Note:

This feature is supported for general availability in releases 6.4.2-6 and later. Some of these features were available as a preview in 6.4.2-4 and 6.4.2-5. Please upgrade to 6.4.2-6 for the full set of general availability features and bug fixes. and later.

Add a participating cluster

Use the following steps to add a participating cluster to an existing Redis Enterprise Active-Active database (REAADB) for Kubernetes.

Set global database configurations

Mon, 01 Jan 0001 00:00:00 +0000

The Redis Enterprise Active-Active database (REAADB) custom resource contains the field .spec.globalConfigurations. This field sets configurations for the Active-Active database across all participating clusters, such as memory size, shard count, and the global database secrets.

The REAADB API reference contains a full list of available fields.

Edit global configurations

Edit or patch the REAADB custom resource with your global configuration changes.

Set global database secret

Mon, 01 Jan 0001 00:00:00 +0000

Set global database secret

One of the fields available for globalConfigurations is databaseSecretName which can point to a secret containing the database password. To set the database secret name and sync the data to all participating clusters, follow the steps below.

Edit Redis Enterprise remote clusters

Mon, 01 Jan 0001 00:00:00 +0000

Note:

Before a RedisEnterpriseCluster (REC) can participate in an Active-Active database, it needs an accompanying RedisEnterpriseRemoteCluster (RERC) custom resource. The RERC contains details allowing the REC to link to the RedisEnterpriseActiveActiveDatabase (REAADB). The RERC resource is listed in the REAADB resource to become a participating cluster for the Active-Active database.

Create Active-Active databases with crdb-cli

Mon, 01 Jan 0001 00:00:00 +0000

Note:

Versions 6.4.2 and later support the Active-Active database controller. This controller allows you to create Redis Enterprise Active-Active databases (REAADB) and Redis Enterprise remote clusters (RERC) with custom resources. We recommend using the REAADB method for creating Active-Active databases.

On Kubernetes, Redis Enterprise Active-Active databases provide read-and-write access to the same dataset from different Kubernetes clusters. For more general information about Active-Active, see the Redis Enterprise Software docs.