autoscaler.tf

resource "aws_launch_configuration" "example" {
  image_id      = "ami-58d7e821"
  instance_type = "t2.micro"

  security_groups = ["${aws_security_group.instance.id}"]

  user_data = <<-EOF
              #!/bin/bash
              echo "Hello, World" > index.html
              nohup busybox httpd -f -p 9000 &
              EOF

  lifecycle {
    create_before_destroy = true
  }
}

resource "aws_autoscaling_group" "example" {
  launch_configuration = "${aws_launch_configuration.example.id}"
  load_balancers       = ["${aws_elb.example.name}"]
  availability_zones   = ["eu-west-1b"]
  min_size             = 2
  max_size             = 5

  tag {
    key                 = "Name"
    value               = "terraform-go-api"
    propagate_at_launch = true
  }
}