Understanding how to build and consume modules
One of Terraform’s most powerful capabilities is its ease of organizing and packaging reusable code, which increases the maintainability of your code base and improves the reusability of common patterns in your architecture.
Traditional developers have it easy—you must simply create a new method to encapsulate a reusable code block. In other IaC tools, doing the same thing is a challenge. In Terraform, all you need is a new folder.
Terraform scopes every module within a folder. When you run terraform init, Terraform transforms the current working directory into the root module of the workspace. You can use modules stored in other folders within the same repository just by using a relative path to reference the module. It is a standard convention within the Terraform community for storing local modules in a modules directory near the root module’s directory.
Consider this folder structure:
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