main.tf

data "aws_ami" "amazon-linux-2" {
  most_recent = true
  owners      = ["amazon"]

  filter {
    name   = "name"
    values = ["amzn2-ami-hvm*"]
  }
}

resource "aws_security_group" "sec_group" {
  name = var.security_group_name

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

  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"]
  }

  tags = {
    Name = var.security_group_name
  }
}

resource "aws_instance" "docker-server" {
  ami                    = data.aws_ami.amazon-linux-2.id
  instance_type          = var.instance_type
  key_name               = var.key_name
  vpc_security_group_ids = [aws_security_group.sec_group.id] # Security Group ID
  user_data              = filebase64("user-data.sh")
  # security_groups      = ["docker-sec-gr"] # Security Group Name, not required if you are using VPC

  tags = {
    "Name" = var.instance_name
  }
}