Cannot SSH into aws_instance, but the same ssh pem key allows SSH access?

[scheung38]

Having ssh issue, why I cannot SSH into aws_instance, but the same ssh pem key allows SSH for the aws_autoscaling_group access?

resource "aws_autoscaling_group" "web" {

  name = "${aws_launch_configuration.web.name}-asg"

  min_size = 1
  desired_capacity = 2
  max_size = 3

  health_check_type = "ELB"
  load_balancers = [
    "${aws_elb.web_elb.id}"
  ]

  launch_configuration = "${aws_launch_configuration.web.name}"
  availability_zones = [
    "eu-west-2a",
    "eu-west-2b"]

  enabled_metrics = [
    "GroupMinSize",
    "GroupMaxSize",
    "GroupDesiredCapacity",
    "GroupInServiceInstances",
    "GroupTotalInstances"
  ]

  metrics_granularity = "1Minute"

  vpc_zone_identifier = [
    "${aws_subnet.public_eu_west_2a.*.id}",
    "${aws_subnet.public_eu_west_2b.*.id}"
  ]

  # Required to redeploy without an outage.
  lifecycle {
    create_before_destroy = true
  }

  tag {
    key = "Name"
    value = "AutoScaleGroup"
    propagate_at_launch = true
  }
}


resource "aws_instance" "main" {
  ami = "${lookup(var.aws_amis, var.aws_region)}"
  instance_type = "t2.micro"

  subnet_id = ""
  //vpc_security_group_ids = []

  key_name = "${aws_key_pair.auth.id}"
  tags {
    Name = "Instance"
    Use = "Demo-90PoE"
  }
}