Book Image

Terraform Cookbook

By : Mikael Krief
Book Image

Terraform Cookbook

By: Mikael Krief

Overview of this book

HashiCorp Configuration Language (HCL) has changed how we define and provision a data center infrastructure with the launch of Terraform—one of the most popular and powerful products for building Infrastructure as Code. This practical guide will show you how to leverage HashiCorp's Terraform tool to manage a complex infrastructure with ease. Starting with recipes for setting up the environment, this book will gradually guide you in configuring, provisioning, collaborating, and building a multi-environment architecture. Unlike other books, you’ll also be able to explore recipes with real-world examples to provision your Azure infrastructure with Terraform. Once you’ve covered topics such as Azure Template, Azure CLI, Terraform configuration, and Terragrunt, you’ll delve into manual and automated testing with Terraform configurations. The next set of chapters will show you how to manage a balanced and efficient infrastructure and create reusable infrastructure with Terraform modules. Finally, you’ll explore the latest DevOps trends such as continuous integration and continuous delivery (CI/CD) and zero-downtime deployments. By the end of this book, you’ll have developed the skills you need to get the most value out of Terraform and manage your infrastructure effectively.
Table of Contents (10 chapters)

Applying a Terrafile pattern for using modules

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.