Terraform Registry modules - Mini Project: Build & Apply

Using Terraform Registry Modules

📖 Scenario: You are setting up cloud infrastructure using Terraform. To simplify your work, you want to use a module from the Terraform Registry that creates a virtual private cloud (VPC) network.This project will guide you step-by-step to configure Terraform to use a Registry module, set variables, and apply the module to create a VPC.

🎯 Goal: Build a Terraform configuration that uses the official Terraform Registry module terraform-aws-modules/vpc/aws to create a VPC with a specific CIDR block and enable DNS support.

📋 What You'll Learn

Use the Terraform Registry module terraform-aws-modules/vpc/aws

Set the VPC CIDR block to 10.0.0.0/16

Enable DNS support and DNS hostnames

Output the VPC ID after creation

💡 Why This Matters

🌍 Real World

Using Terraform Registry modules helps you quickly build cloud infrastructure by reusing tested and community-approved code.

💼 Career

Cloud engineers and DevOps professionals often use Terraform modules to standardize and speed up infrastructure deployment.

1

Initialize Terraform configuration with provider

Create a Terraform configuration file that declares the aws provider with the region set to us-east-1.

Terraform

# Your code here

Need a hint?

Use the provider "aws" block and set region = "us-east-1".

2

Add the Terraform Registry VPC module

Add a module block named vpc that uses the source terraform-aws-modules/vpc/aws with version ~> 3.0.

Terraform

terraform {
  required_providers {
    aws = {
      source  = "hashicorp/aws"
      version = "~> 4.0"
    }
  }
}

provider "aws" {
  region = "us-east-1"
}

# Your code here

Need a hint?

Use a module "vpc" block with source and version attributes.

3

Configure the VPC module with CIDR and DNS settings

Inside the module "vpc" block, set cidr to "10.0.0.0/16", enable_dns_support to true, and enable_dns_hostnames to true.

Terraform

terraform {
  required_providers {
    aws = {
      source  = "hashicorp/aws"
      version = "~> 4.0"
    }
  }
}

provider "aws" {
  region = "us-east-1"
}

module "vpc" {
  source  = "terraform-aws-modules/vpc/aws"
  version = "~> 3.0"
  # Your code here
}

Need a hint?

Add the three variables inside the module block exactly as shown.

4

Output the VPC ID

Create an output block named vpc_id that outputs the value of module.vpc.vpc_id.

Terraform

terraform {
  required_providers {
    aws = {
      source  = "hashicorp/aws"
      version = "~> 4.0"
    }
  }
}

provider "aws" {
  region = "us-east-1"
}

module "vpc" {
  source              = "terraform-aws-modules/vpc/aws"
  version             = "~> 3.0"
  cidr                = "10.0.0.0/16"
  enable_dns_support  = true
  enable_dns_hostnames = true
}

# Your code here

Need a hint?

Use an output block with the name vpc_id and set value = module.vpc.vpc_id.