AWS CloudHSM provides Hardware Security Modules (HSMs) in a cluster, a collection of individual HSMs that AWS CloudHSM keeps in sync.
When you create a cluster, you specify an Amazon Virtual Private Cloud (VPC) and a Subnet in the Availability Zone (AZ) of your instance. You then create an HSM in your cluster, selecting an Availability Zone (AZ) for the creation of the HSM.
Follow the steps below to create a cluster and an HSM: