Intro

What is Infrastructure as Code?

Provisioning your infrastructure through code instead of manual processes.

Why Infrastructure as Code?

• Consistency: Identical environments across dev, staging, and production
• Time Efficiency: Automated provisioning saves hours of manual work
• Cost Management: Easy to track costs and automate cleanup
• Scalability: Deploy to hundreds of servers with same effort as one
• Version Control: Track changes in Git
• Reduced Human Error: Eliminate manual configuration mistakes
• Collaboration: Team can work together on infrastructure

Benefits of IaC

• Consistent environment deployment
• Easy to track and manage costs
• Write once, deploy many (single codebase)
• Time-saving automation
• Reduced human error
• Cost optimization through automation
• Version control for infrastructure changes
• Automated cleanup and scheduled destruction
• Developer focus on application development
• Easy creation of identical production environments for troubleshooting

What is Terraform?

Infrastructure as Code tool that helps automate infrastructure provisioning and management across multiple cloud providers.

How Terraform Works

Write Terraform files → Run Terraform commands → Call AWS APIs through Terraform Provider

Terraform Workflow Phases:

1. terraform init - Initialize the working directory
2. terraform validate - Validate the configuration files
3. terraform plan - Create an execution plan
4. terraform apply - Apply the changes to reach desired state
5. terraform destroy - Destroy the infrastructure when needed

Tasks for Practice

Install Terraform

Follow the installation guide: https://developer.hashicorp.com/terraform/install

or

Common Installation Commands

# For macOS
brew install hashicorp/tap/terraform

# For Ubuntu/Debian
wget -O- <https://apt.releases.hashicorp.com/gpg> | sudo gpg --dearmor -o /usr/share/keyrings/hashicorp-archive-keyring.gpg
echo "deb [signed-by=/usr/share/keyrings/hashicorp-archive-keyring.gpg] <https://apt.releases.hashicorp.com> $(lsb_release -cs) main" | sudo tee /etc/apt/sources.list.d/hashicorp.list
sudo apt update && sudo apt install terraform

Setup Commands

terraform -install-autocomplete
alias tf=terraform
terraform -version

Common Installation Error (macOS)

If you encounter:

Error: No developer tools installed.

Install Command Line Tools:

xcode-select --install