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)

Testing Terraform module code with Terratest

When developing a Terraform module that will be used in multiple Terraform configurations and shared with other teams, there is one step that is often neglected and that is the testing of the module.

Among the Terraform framework and testing tools is the Terratest framework, created by the Gruntwork community (https://gruntwork.io/static/), which is popular and allows testing on code written in the Go language.

In this recipe, we will study how to use Terratest to write and run integration tests on Terraform configuration and modules in particular.

Getting ready

The Terratest test framework is written in Golang (Go language) and the tests run on the Go runtime. That's why, as a prerequisite, we need to install Go by going to https://golang.org/.

The minimum Go version required for Terratest is specified here: https://terratest.gruntwork.io/docs/getting-started/quick-start/#requirements.

Here are some important steps to install Go: for...