We have seen throughout this chapter's recipes how to create Terraform modules and how to use them either locally or remotely with the public registry or Git repositories.
However, when you have a Terraform configuration that uses many modules, managing these modules can become complicated. This is indeed the case when the versions of these modules change; it is necessary to browse through all of the Terraform configurations to make version changes. Moreover, we do not have global visibility on all of the modules called in this Terraform configuration as well as their versions.
Analogous to the classic package managers (NPM and NuGet), a pattern has been exposed by several people that allows users to gather the configuration of the Terraform modules used in a Terraform configuration in a centralized file called a Terrafile.
In this recipe, we will study how to use the Terrafile pattern to manage the sources of the Terraform modules.
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