Code review for infrastructure changes in Terraform - Mini Project: Build & Apply

Code Review for Infrastructure Changes with Terraform

📖 Scenario: You are part of a cloud team managing infrastructure using Terraform. Before applying any changes, you need to review the Terraform configuration files carefully to ensure they follow best practices and meet the project requirements.This project will guide you through creating a simple Terraform configuration, adding variables for flexibility, writing the main resource block, and finally adding output to review the infrastructure state.

🎯 Goal: Build a Terraform configuration step-by-step that defines an AWS S3 bucket with a variable for the bucket name, includes a resource block to create the bucket, and outputs the bucket ARN for review.

📋 What You'll Learn

Create a Terraform variable for the S3 bucket name

Define an AWS S3 bucket resource using the variable

Add an output block to display the bucket ARN

Use valid Terraform syntax and best practices

💡 Why This Matters

🌍 Real World

Terraform is widely used to manage cloud infrastructure as code. Reviewing configuration files carefully before applying changes helps prevent mistakes and ensures infrastructure is created as intended.

💼 Career

Cloud engineers and DevOps professionals regularly write and review Terraform code to manage infrastructure safely and efficiently. This project builds foundational skills for those roles.

1

Create a Terraform variable for the S3 bucket name

Write a Terraform variable block named bucket_name with type string and default value "my-unique-bucket-12345".

Terraform

# Define a variable for the S3 bucket name
# Your code here

Need a hint?

Use the variable block with type and default attributes.

2

Add a provider configuration for AWS

Add a Terraform provider block for aws with region set to us-east-1.

Terraform

variable "bucket_name" {
  type    = string
  default = "my-unique-bucket-12345"
}

# Add AWS provider configuration below
# Your code here

Need a hint?

The provider block specifies which cloud provider and region Terraform will use.

3

Define an AWS S3 bucket resource using the variable

Create a Terraform resource block named aws_s3_bucket with resource name my_bucket. Set the bucket attribute to use the variable bucket_name.

Terraform

variable "bucket_name" {
  type    = string
  default = "my-unique-bucket-12345"
}

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

# Define the S3 bucket resource below
# Your code here

Need a hint?

Use resource "aws_s3_bucket" "my_bucket" and set bucket = var.bucket_name.

4

Add an output block to display the bucket ARN

Add a Terraform output block named bucket_arn that outputs the ARN of the S3 bucket resource aws_s3_bucket.my_bucket.arn.

Terraform

variable "bucket_name" {
  type    = string
  default = "my-unique-bucket-12345"
}

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

resource "aws_s3_bucket" "my_bucket" {
  bucket = var.bucket_name
}

# Add output block for bucket ARN below
# Your code here

Need a hint?

The output block helps you see important information after Terraform applies changes.