amazon-web-services - 通过 Terraform 在目标组中添加 ASG 实例

Question

我有一个 Terraform 脚本，它创建一个启动配置、自动缩放组、一个 ALB、一个目标组和一个监听器。实例是使用自动缩放组启动的。

如何在同一脚本中通过 Terraform 在目标组中添加新启动的实例？

resource "aws_launch_configuration" "CF2TF-LC" {
  name                 = "CF2TF-LC"
  depends_on           = ["aws_iam_role_policy_attachment.CF2TF-IAM-PA", "aws_security_group.CF2TF-SG-Web"]
  image_id             = "ami-14c5486b"
  instance_type        = "t2.micro"
  iam_instance_profile = "${aws_iam_instance_profile.CF2TF-IAM-IP.id}"
  key_name             = "CF2TF"
  security_groups      = ["${aws_security_group.CF2TF-SG-Web.id}"]
  user_data            = "${template_file.CF2TF-UserData.rendered}"
}

resource "aws_autoscaling_group" "CF2TF-ASG" {
  name                      = "CF2TF-ASG"
  depends_on                = ["aws_launch_configuration.CF2TF-LC"]
  vpc_zone_identifier       = ["${aws_subnet.CF2TF-Subnet-1a.id}", "${aws_subnet.CF2TF-Subnet-1d.id}"]
  max_size                  = 3
  min_size                  = 2
  health_check_grace_period = 300
  health_check_type         = "EC2"
  desired_capacity          = 2
  force_delete              = true
  launch_configuration      = "${aws_launch_configuration.CF2TF-LC.id}"
}

resource "aws_lb" "CF2TF-ALB" {
  name               = "CF2TF-ALB"
  subnets            = ["${aws_subnet.CF2TF-Subnet-1a.id}", "${aws_subnet.CF2TF-Subnet-1d.id}"]
  internal           = false
  load_balancer_type = "application"
  security_groups    = ["${aws_security_group.CF2TF-SG-Web.id}"]

  tags {
    Name        = "WebSrv"
    Environment = "Dev"
  }
}

resource "aws_lb_target_group" "CF2TF-TargetGroup" {
  name        = "CF2TF-TargetGroup"
  depends_on  = ["aws_vpc.CF2TF-VPC"]
  port        = 80
  protocol    = "HTTP"
  vpc_id      = "${aws_vpc.CF2TF-VPC.id}"
  target_type = "instance"

  health_check {
    interval            = 30
    path                = "/index.html"
    port                = 80
    healthy_threshold   = 5
    unhealthy_threshold = 2
    timeout             = 5
    protocol            = "HTTP"
    matcher             = "200,202"
  }
}

resource "aws_lb_listener" "CF2TF-ALB-Listener" {
  //depends_on = ["aws_lb.CF2TF-ALB.id", "aws_lb_target_group.CF2TF-TargetGroup.id"]
  load_balancer_arn = "${aws_lb.CF2TF-ALB.arn}"
  port              = "80"
  protocol          = "HTTP"

  default_action {
    target_group_arn = "${aws_lb_target_group.CF2TF-TargetGroup.arn}"
    type             = "forward"
  }
}

Answer 1

aws_autoscaling_group资源需要一个 target_group_arns parameter这会将 ASG 注册到目标组，以便所有实例在出现并在终止之前从负载平衡器中正确排出时都注册到负载均衡器的目标组。

因此，您的 ASG 资源应如下所示:

resource "aws_autoscaling_group" "CF2TF-ASG" {
  name                      = "CF2TF-ASG"
  depends_on                = ["aws_launch_configuration.CF2TF-LC"]
  vpc_zone_identifier       = ["${aws_subnet.CF2TF-Subnet-1a.id}", "${aws_subnet.CF2TF-Subnet-1d.id}"]
  max_size                  = 3
  min_size                  = 2
  health_check_grace_period = 300
  health_check_type         = "EC2"
  desired_capacity          = 2
  force_delete              = true
  launch_configuration      = "${aws_launch_configuration.CF2TF-LC.id}"
  target_group_arns         = ["${aws_lb_target_group.CF2TF-TargetGroup.arn}"]
}