Set up automatic scaling for your Amazon MSK cluster
You can use the Amazon MSK console, the Amazon MSK API, or AWS CloudFormation to implement automatic scaling for storage. CloudFormation support is available through Application Auto Scaling.
Note
You can't implement automatic scaling when you create a cluster. You must first create the cluster, and then create and enable an auto-scaling policy for it. However, you can create the policy while Amazon MSK service creates your cluster.