AWS-ElastiCache-redis-clusters-multi-AZ-failover-enable

Severity: Low

Description: This control ensures  that AWS ElastiCache Redis cluster with Multi-AZ Automatic Failover is enabled. Multi-AZ is necessary if the ElastiCache Redis cluster needs to achieve high availability. Redis asynchronously replicates the data form the primary to the read replicas. ElastiCache also propagates the DNS name of the promoted replica do that there is no endpoint change required on the application side. Auto-failover and Multi-AZ both should be enabled for Mutli-AZ Automatic Failover to work.

Remediation Steps:

Perform following to enable Multi-AZ on Redis Cluster :

1. Login to the AWS Management Console at https://console.aws.amazon.com.

2. Navigate to ElastiCache console.

3. In the navigation pane, choose Redis.

4. Choose the box to the left of the name of the Redis cluster for which you want to enable Multi-AZ.

5. In Actions dropdown choose Modify.

6. In the Modify cluster window ensure that Multi-AZ option is checked.

7. Click Modify.

Important:

Reference:

• https://docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/AutoFailover.html

• https://docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/Replication.Modify.html