Book Image

HashiCorp Infrastructure Automation Certification Guide

By : Ravi Mishra
Book Image

HashiCorp Infrastructure Automation Certification Guide

By: Ravi Mishra

Overview of this book

Terraform is a highly sought-after technology for orchestrating infrastructure provisioning. This book is a complete reference guide to enhancing your infrastructure automation skills, offering up-to-date coverage of the HashiCorp infrastructure automation certification exam. This book is written in a clear and practical way with self-assessment questions and mock exams that will help you from a HashiCorp infrastructure automation certification exam perspective. This book covers end-to-end activities with Terraform, such as installation, writing its configuration file, Terraform modules, backend configurations, data sources, and infrastructure provisioning. You'll also get to grips with complex enterprise infrastructures and discover how to create thousands of resources with a single click. As you advance, you'll get a clear understanding of maintaining infrastructure as code (IaC) in Repo/GitHub, along with learning how to create, modify, and remove infrastructure resources as and when needed. Finally, you'll learn about Terraform Cloud and Enterprise and their enhanced features. By the end of this book, you'll have a handy, up-to-date desktop reference guide along with everything you need to pass the HashiCorp Certified: Terraform Associate exam with confidence.
Table of Contents (17 chapters)
1
Section 1: The Basics
4
Section 2: Core Concepts
10
Section 3: Managing Infrastructure with Terraform
14
Chapter 11: Terraform Glossary

Understanding Terraform output

In this section, we are going to see how you can define the Terraform output file as well as what the best practices are for referencing the output of one resource as input for other dependent resources. We will be discussing Terraform output for AWS, GCP, and Azure.

Terraform output

Let's try to understand what this Terraform output is and ideally, what we can achieve from it, as well as why we need to define Terraform output for any of the Terraform configuration files. Output values are the return values of a Terraform resource/module/data, and they have many use cases:

  • The output from one resource/module/data can be called into other resources/modules/data if there is a dependency on the first resource. For example, if you want to create an Azure subnet and you have already created an Azure virtual network, then, in order to provide the reference of your virtual network in the subnet, you can use the output of the virtual network...