The real challenge for developers and software factories in recent years has been to stop writing the portions of code that are repeated between applications and even between teams. Hence the emergence of language, framework, and software packages that are easily reusable in several applications and that can be shared between several teams (such as NuGet, NPM, Bower, PyPI, RubyGems, and many others). In Infrastructure as Code (IaC) in general, we also encounter the same problems of code structure, its homogenization, and its sharing in the company.
We learned in the Provisioning infrastructure in multiple environments recipe of Chapter 2, Writing Terraform Configuration, some topologies of the structure of the Terraform configuration, that gave us a partial answer to the question of how to structure a Terraform configuration well. But...
