Using a Terraform Module and standing up one instance of a module is very common. And spinning up one Vault cluster is fairly straight forward. But what happens when you need to go from 1 instance to 4? This presentation covers how to develop and organize a Terraform project to manage multiple HA Vault Clusters for deployment. As a Senior Implementation Services Engineer for HashiCorp, I've been working with customers large and small to help them put Vault into production, and I will talk about the different strategies and patterns I've seen in the field.