Terragrunt

Terragrunt is a thin wrapper that provides extra tools for keeping your configurations DRY, working with multiple Terraform modules, and managing remote state. Define Terraform code once, no matter how many environments you have. Get rid of duplicated backend code. Define how to manage your Terraform state once in a root directory and inherit in all child modules. Set CLI arguments for repeatable Terraform commands once in Terragrunt configuration. Execute Terraform commands on multiple modules at once. Run one command for all modules instead of executing it in each module independently. Execute custom code before or after running Terraform. Terragrunt has the ability to download remote Terraform configurations. The idea is that you define the Terraform code for your infrastructure just once, in a single repo. The easiest way to use Terragrunt with private Git repos is to use SSH authentication. Configure your Git account so you can use it with SSH.