Question

我正在通过AWS上的Terraform创建主机集群，并尝试利用计数来避免创建3个独立的luanch配置和自动缩放组。我在使用scale.index引用单个启动配置的自动缩放组部分中没有获得成功。

这就是我认为这会起作用的方式

resource "aws_launch_configuration" "cluster-lc" {
  count                       = 3
  associate_public_ip_address = true
  image_id                    = "${data.aws_ami.ami.id}"
  instance_type               = "${var.instance-type}"
  security_groups             = ["${aws_security_group.sg.id}"]
  key_name                    = "kp"
  user_data                   = "${data.template_file.user_data.rendered}"
  lifecycle {
    create_before_destroy = true
  }
}

resource "aws_autoscaling_group" "asg" {
  count                = 3
  desired_capacity     = 1
  launch_configuration = "${aws_launch_configuration.cluster-lc[count.index].name}"
  max_size             = 1
  min_size             = 1
  name                 = "asg-${count.index}"
  vpc_zone_identifier  = ["${var.subnets.[count.index]}"]
}

尝试上述类似方法时，出现以下错误。

Error: Error loading /test.tf: Error reading config for aws_autoscaling_group[asg]: parse error at 1:47: expected "}" but found "."

“ $ {aws_launch_configuration.cluster-lc。[count.index] .name}” “ $ {aws_launch_configuration.cluster-lc。[count.index] name}”

如果我尝试“ $ {aws_launch_configuration.cluster-lc.name。[count.index]}”，则会出现以下错误。

Error: Error running plan: 1 error(s) occurred:

* aws_autoscaling_group.zoo-asg: 3 error(s) occurred:

* aws_autoscaling_group.asg[2]: Resource 'aws_launch_configuration.cluster-lc' not found for variable 'aws_launch_configuration.cluster-lc.name.'
* aws_autoscaling_group.asg[1]: Resource 'aws_launch_configuration.cluster-lc' not found for variable 'aws_launch_configuration.cluster-lc.name.'
* aws_autoscaling_group.asg[0]: Resource 'aws_launch_configuration.cluster-lc' not found for variable 'aws_launch_configuration.cluster-lc.name.'

Answer 1

我已经通过在hashicorp网站上阅读一些相关材料（https://www.terraform.io/docs/configuration/interpolation.html#using-templates-with-count）来解决问题。

以下内容对我有用。

resource "aws_autoscaling_group" "asg" {
  count                = 3
  desired_capacity     = 1
  launch_configuration = "${aws_launch_configuration.cluster-lc.*.name[count.index]}"
  max_size             = 1
  min_size             = 1
  name                 = "asg-${count.index}"
  vpc_zone_identifier  = ["${var.subnets.[count.index]}"]
}

通过自动缩放组中的count.index引用启动配置

1 个答案: