Description
Name of the resource
AWS::ElastiCache::ReplicationGroup
Resource name
No response
Reference Link
Original issue - aws/aws-cdk#33365
Details
The clusterMode property of the CfnReplicationGroup component should not be a plain string type, but 'enabled' | 'disabled' | undefined. The documentation (incorrectly?) lists the valid options for this property as Disabled or Enabled, with a capital D/E, which causes problems when you try to deploy, such as incorrectly triggering Cluster mode updates are not supported while attempting to update additional properties. If you instead change to lower-case typing in the CDK, it seems to work as expected. This is described in this thread as well.
So it seems that https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-elasticache-replicationgroup.html#cfn-elasticache-replicationgroup-clustermode is either incorrect or that the output produced by the CDK is different from its input (i.e. lowercase in CDK but titelcase in the API).
Either way, correctly typing this would avoid this issue entirely.