การติดตั้ง OpenTofu บน Ubuntu

# main.tf - Hello World Example

terraform {
  required_version = ">= 1.0.0"
  required_providers {
    local = {
      source  = "hashicorp/local"
      version = "2.4.0"
    }
  }
}

provider "local" {
  # Configuration (optional)
}

resource "local_file" "hello" {
  content  = "Hello OpenTofu! This is my first IaC deployment."
  filename = "${path.module}/hello.txt"
}

# main.tf - AWS EC2 Example

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

provider "aws" {
  region = "ap-southeast-1"  # Asia Pacific (Singapore)
}

resource "aws_vpc" "main" {
  cidr_block           = "10.0.0.0/16"
  enable_dns_hostnames = true
  enable_dns_support   = true

  tags = {
    Name = "opentofu-ec2-vpc"
  }
}

resource "aws_subnet" "main" {
  vpc_id                  = aws_vpc.main.id
  cidr_block              = "10.0.1.0/24"
  availability_zone       = "ap-southeast-1a"
  map_public_ip_on_launch = true

  tags = {
    Name = "opentofu-ec2-subnet"
  }
}

resource "aws_security_group" "web" {
  name        = "web-sg"
  description = "Allow SSH and HTTP"
  vpc_id      = aws_vpc.main.id

  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"]
  }

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

resource "aws_instance" "web" {
  ami           = "ami-0c55b159cbfafe1f0"  # Ubuntu 22.04 LTS (adjust per region)
  instance_type = "t2.micro"

  vpc_security_group_ids = [aws_security_group.web.id]
  subnet_id              = aws_subnet.main.id

  tags = {
    Name = "opentofu-ec2-instance"
  }

  user_data = <<-EOF
              #!/bin/bash
              apt update -y
              apt install nginx -y
              echo "Hello from OpenTofu EC2!" > /var/www/html/index.html
              service nginx start
              EOF
}

# main.tf - DigitalOcean Example

terraform {
  required_providers {
    digitalocean = {
      source  = "digitalocean/digitalocean"
      version = "~> 2.0"
    }
  }
}

provider "digitalocean" {
  token = var.do_token
}

variable "do_token" {
  description = "DigitalOcean API Token"
  type        = string
  sensitive   = true
}

resource "digitalocean_droplet" "web" {
  image  = "ubuntu-22-04-x64"
  name   = "opentofu-droplet"
  region = "sgp1"
  size   = "s-1vcpu-1gb"

  tags = ["opentofu", "web"]

  provisioner "local-exec" {
    command = "echo Droplet IP: ${self.ipv4_address}"
  }
}