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)

Using another file inside a custom module

In the Creating Terraform module and using it locally recipe of this chapter, we studied the steps to create a basic Terraform module.

We can have scenarios where we need to use another file in the module that doesn't describe the infrastructure via Terraform (.tf extension), for example, in the case where the module needs to execute a script locally for operating an internal program.

In this recipe, we will study how to use another file in a Terraform module.

Getting ready

For this recipe, we don't need any prerequisites; we will write the Terraform configuration for the module from scratch.

The goal of this recipe is to create a Terraform module that will execute a Bash script that will perform actions on the local computer (for this recipe, a hello world display will suffice).

Since we will be running a Bash script as an example, we will run Terraform under a Linux system.

It is important to keep in mind that provisioners such as...