Terraform AWS EC2

This project demonstrates how to provision a fully configured AWS EC2 instance using Terraform.

---

Project Overview

• EC2 Instance (t3.micro)
• Security Group (SSH & HTTP access)
• Key Pair (SSH login)
• EBS Storage (10GB)
• Nginx Web Server (auto installed)

---

Prerequisites

• AWS Account
• AWS CLI configured (aws configure)
• Terraform installed
• Git installed

---

Terraform Code

provider "aws" {
  region = "ap-south-1"
}

resource "aws_key_pair" "deployer" {
  key_name   = "terraform-key"
  public_key = file("my-key.pub")
}

resource "aws_security_group" "ec2_sg" {
  name = "ec2-security-group"

  ingress {
    from_port   = 22
    to_port     = 22
    protocol    = "tcp"
    cidr_blocks = ["0.0.0.0/0"]
  }

  ingress {
    from_port   = 80
    to_port     = 80
    protocol    = "tcp"
    cidr_blocks = ["0.0.0.0/0"]
  }

  egress {
    from_port   = 0
    to_port     = 0
    protocol    = "-1"
    cidr_blocks = ["0.0.0.0/0"]
  }
}

resource "aws_instance" "my_ec2" {
  ami             = "ami-0e12ffc2dd465f6e4"
  instance_type   = "t3.micro"
  key_name        = aws_key_pair.deployer.key_name
  security_groups = [aws_security_group.ec2_sg.name]

  root_block_device {
    volume_size = 10
    volume_type = "gp2"
  }

  user_data = <<-EOF
              #!/bin/bash
              yum update -y
              yum install nginx -y
              systemctl start nginx
              systemctl enable nginx
              EOF

  tags = {
    Name = "Terraform-Full-EC2"
  }
}

---

Deployment Steps

1. Initialize Terraform

terraform init

2. Check Plan

terraform plan

3. Apply Configuration

terraform apply

Type yes when prompted.

---

Connect to EC2

ssh -i my-key ec2-user@<your-public-ip>

Open in browser: http://<your-public-ip>

Nginx page will be visible.

---

Terraform Plan

Terraform Apply

EC2 Instance

Nginx Output

---

Cleanup

terraform destroy

---

Project Structure

terraform-ec2/
├── main.tf
├── .gitignore
├── screenshots/
├── my-key.pub
└── README.md

---

Security

• Private key (my-key) is not uploaded
• .gitignore protects sensitive files

---

Learnings

• Terraform basics
• AWS EC2 provisioning
• Security groups
• Infrastructure as Code
• Automation using user_data

---

Author

Ayush Nath Motichur