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)

Validating the code syntax

When writing a Terraform configuration, it is important to be able to validate the syntax of the code we are writing before executing it, or even before archiving it in a Git repository.

We will see in this recipe how, by using the Terraform client tool, we can check the syntax of a Terraform configuration.

Getting ready

For this recipe, we will start with the following Terraform configuration, which is written in a file:

What we notice in the preceding code is that the declaration of the environment variable is missing.

How to do it…

To validate our Terraform configuration syntax, perform the following steps:

  1. To start, initialize the Terraform context by running the following command:
terraform init
  1. Then, validate the code by executing the validate command:
terraform validate

How it works…

In step 1, we initialize the Terraform context by executing the terraform init command.

Then, we perform a check of the code validity by executing...