aws-terraform-ec2-basic/main.tf at main · JovanOps/aws-terraform-ec2-basic · GitHub

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terraform {
  required_version = ">= 1.5.0"
  required_providers {
    aws = {
      source  = "hashicorp/aws"
      version = "~> 5.0"
    }
  }
}

provider "aws" {
  region = var.aws_region
}

# ---------- Networking ----------
resource "aws_vpc" "lab" {
  cidr_block           = "10.20.0.0/16"
  enable_dns_hostnames = true
  enable_dns_support   = true

  tags = {
    Name = "tf-lab-vpc"
  }
}

resource "aws_internet_gateway" "lab" {
  vpc_id = aws_vpc.lab.id

  tags = {
    Name = "tf-lab-igw"
  }
}

resource "aws_subnet" "public" {
  vpc_id                  = aws_vpc.lab.id
  cidr_block              = "10.20.1.0/24"
  map_public_ip_on_launch = true
  availability_zone       = "${var.aws_region}a"

  tags = {
    Name = "tf-lab-public-subnet"
  }
}

resource "aws_route_table" "public" {
  vpc_id = aws_vpc.lab.id

  route {
    cidr_block = "0.0.0.0/0"
    gateway_id = aws_internet_gateway.lab.id
  }

  tags = {
    Name = "tf-lab-public-rt"
  }
}

resource "aws_route_table_association" "public" {
  subnet_id      = aws_subnet.public.id
  route_table_id = aws_route_table.public.id
}

# ---------- Security ----------
resource "aws_security_group" "web" {
  name        = "tf-lab-web-sg"
  description = "Allow HTTP and SSH"
  vpc_id      = aws_vpc.lab.id

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

  ingress {
    description = "SSH (change to your IP later)"
    from_port   = 22
    to_port     = 22
    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"]
  }

  tags = {
    Name = "tf-lab-web-sg"
  }
}

# ---------- AMI (Ubuntu) ----------
data "aws_ami" "ubuntu" {
  most_recent = true
  owners      = ["099720109477"] # Canonical

  filter {
    name   = "name"
    values = ["ubuntu/images/hvm-ssd/ubuntu-jammy-22.04-amd64-server-*"]
  }

  filter {
    name   = "virtualization-type"
    values = ["hvm"]
  }
}

# ---------- EC2 ----------
resource "aws_instance" "web" {
  ami                    = data.aws_ami.ubuntu.id
  instance_type          = var.instance_type
  subnet_id              = aws_subnet.public.id
  vpc_security_group_ids = [aws_security_group.web.id]

  user_data = <<-EOF
              #!/bin/bash
              apt-get update -y
              apt-get install -y nginx
              systemctl enable nginx
              systemctl start nginx
              echo "<h1>JovanOps AWS Terraform Lab</h1><p>EC2 + VPC deployed via Terraform</p>" > /var/www/html/index.html
              EOF

  tags = {
    Name = "tf-lab-ec2-web"
  }
}