test.tf

gistfile1.tf

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

resource "aws_instance" "app" {
  ami           = "ami-0c55b159cbfafe1f0",
  instance_type = "t2.medium"

  subnet_id = data.aws_subnet.default.id

  vpc_security_group_ids = [
    aws_security_group.sg.id,
    "sg-12345678"
  ]

  user_data = <<EOF
#!/bin/bash
yum update -y
node app.js &
EOF

  tags = {
    Name = "production-app"
    Env  = "prod"
  }
}

data "aws_subnet" "default" {
  filter {
    name   = "tag:Name"
    values = ["default"] 
  }
}

resource "aws_security_group" "sg" {
  name   = "app-sg"
  vpc_id = data.aws_vpc.default.id

  ingress {
    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"]
  }
}

data "aws_vpc" "default" {
  default = true
}