Vault cluster on AWS EC2

I have just completed POC on stand-alone vault with AWS KMS & Auth integration.
Now, to proceed further I need to deploy Vault as cluster.

Is there any guidance on how to setup a vault cluster with AWS KMS & Auth integration? i am looking for a 2-3 node vault cluster.

Any help/suggestion/guidance appreciated.

This may help - terraform-aws-vault/examples at master · hashicorp/terraform-aws-vault · GitHub