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Getting Started with Terraform

Getting Started with Terraform

By : Kirill Shirinkin
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Getting Started with Terraform

Getting Started with Terraform

2 (1)
By: Kirill Shirinkin

Overview of this book

Terraform is a tool used to efficiently build, configure, and improve production infrastructure. It can manage existing infrastructure as well as create custom in-house solutions. This book shows you when and how to implement infrastructure as a code practices with Terraform. It covers everything necessary to set up complete management of infrastructure with Terraform, starting with the basics of using providers and resources. This book is a comprehensive guide that begins with very small infrastructure templates and takes you all the way to managing complex systems, all using concrete examples that evolve over the course of the book. It finishes with the complete workflow of managing a production infrastructure as code – this is achieved with the help of version control and continuous integration. At the end of this book, you will be familiar with advanced techniques such as multi-provider support and multiple remote modules.
Table of Contents (15 chapters)
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Getting Started with Terraform
Credits
About the Author
About the Reviewer
www.PacktPub.com
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Preface

Configuring modules


Let's list the data we need to pass to the module:

  • Name of the application

  • VPC ID

  • Subnet ID

That should be sufficient for now. Update the module inside template.tf to look as follows:

module "mighty_trousers" { 
  source = "./modules/application" 
  vpc_id = "${aws_vpc.my_vpc.id}" 
  subnet_id = "${aws_subnet.public.id}" 
  name = "MightyTrousers" 
} 

Passing data like this is not enough, though. We need to define variables inside the module template. The thing is, our tempate.tf is a module itself, a special module named root module. That's what you saw on the last graph we drew--resources were coming from the root module. So, we were actually already using modules all this time, and every module, including the root module, can be configured with variables.

Note

We did not look much into Terraform variables in general till now, and most of the content on this topic is explained in Chapter 4, Storing and Supplying Configuration. For now, let's get...

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