Auto Scaling Group 和 EFS 上具有动态标签的模块

Question

我想在 aws_autoscaling_group 资源上获取动态标签，但与文档中的示例不同，我现在还不知道会有多少。

所以设置了以下几行：

variable "tags" {
  type = "map"

  default = {
    tag1 = "value1"
    tag2 = "value2"
  }
}

resource "aws_autoscaling_group" "asg" {
  name                 = "test-asg"
  launch_configuration = "test-lc"
  min_size             = 1
  max_size             = 1
  min_elb_capacity     = 1
  vpc_zone_identifier  = ["subnet-1234"]
  tags                 = <code_here>
}

我想出了一个最多支持x 动态标签的解决方案。不幸的是，它使用虚拟标签来填充未提供的标签，直到 x。

data "template_file" "test" {
  count    = "9"
  template = "key:@:$${key}:@:value:@:$${value}:@:propagate_at_launch:@:true"

  vars {
    key   = "${element(concat(keys(var.tags), list("unusedtag1", "unusedtag2","unusedtag3","unusedtag4","unusedtag5","unusedtag6","unusedtag7","unusedtag8","unusedtag9")), count.index)}"
    value = "${element(concat(values(var.tags), list("", "","","","","","","","")), count.index)}"
  }
}

locals{
  tag0 = "${split(":@:", data.template_file.test.0.rendered)}"
  tag1 = "${split(":@:", data.template_file.test.1.rendered)}"
  tag2 = "${split(":@:", data.template_file.test.2.rendered)}"
  tag3 = "${split(":@:", data.template_file.test.3.rendered)}"
  tag4 = "${split(":@:", data.template_file.test.4.rendered)}"
  tag5 = "${split(":@:", data.template_file.test.5.rendered)}"
  tag6 = "${split(":@:", data.template_file.test.6.rendered)}"
  tag7 = "${split(":@:", data.template_file.test.7.rendered)}"
  tag8 = "${split(":@:", data.template_file.test.8.rendered)}"

  tags = "${list(
          map(local.tag0[0],local.tag0[1],local.tag0[2],local.tag0[3],local.tag0[4],local.tag0[5]),
          map(local.tag1[0],local.tag1[1],local.tag1[2],local.tag1[3],local.tag1[4],local.tag1[5]),
          map(local.tag2[0],local.tag2[1],local.tag2[2],local.tag2[3],local.tag2[4],local.tag2[5]),
          map(local.tag3[0],local.tag3[1],local.tag3[2],local.tag3[3],local.tag3[4],local.tag3[5]),
          map(local.tag4[0],local.tag4[1],local.tag4[2],local.tag4[3],local.tag4[4],local.tag4[5]),
          map(local.tag5[0],local.tag5[1],local.tag5[2],local.tag5[3],local.tag5[4],local.tag5[5]),
          map(local.tag6[0],local.tag6[1],local.tag6[2],local.tag6[3],local.tag6[4],local.tag6[5]),
          map(local.tag7[0],local.tag7[1],local.tag7[2],local.tag7[3],local.tag7[4],local.tag7[5]),
          map(local.tag8[0],local.tag8[1],local.tag8[2],local.tag8[3],local.tag8[4],local.tag8[5]),
          )}"
}

通过 ASG 中的此代码，我可以使用 tags = ["${local.tags}"]。通过示例输入，资源被标记为

tag1 = value1
tag2 = value2
unusedtag1 = 
unusedtag2 = 
unusedtag3 = 
unusedtag4 = 
unusedtag5 =
unusedtag6 = 
unusedtag7 =  

我想有一个解决方案是

• 动态
• 是否标记了额外的标签

---

编辑：恢复到不清楚但更简单的问题，并在 terraform dynamic tags on ASG and other resources like EFS 上打开了一个新问题

Answer 1

example given in the docs 展示了您可以越来越动态地将标签添加到自动缩放组的不同方式。

您显然可以像这样使用完全静态的tag 节：

resource "aws_autoscaling_group" "bar" {
  ...

  tag {
    key                 = "lorem"
    value               = "ipsum"
    propagate_at_launch = false
  }
}

或者您可以使用更动态的tags 节，它使您能够使用concat 构建标签列表：

variable extra_tags {
  default = [
    {
      key = "Foo"
      value = "Bar"
      propagate_at_launch = true
    },
    {
      key = "Baz"
      value = "Bam"
      propagate_at_launch = true
    },
  ]
}

resource "aws_autoscaling_group" "bar" {
  ...

  tags = [
    {
      key                 = "explicit1"
      value               = "value1"
      propagate_at_launch = true
    },
    {
      key                 = "explicit2"
      value               = "value2"
      propagate_at_launch = true
    },
  ]

  tags = ["${concat(
    list(
      map("key", "interpolation1", "value", "value3", "propagate_at_launch", true),
      map("key", "interpolation2", "value", "value4", "propagate_at_launch", true)
    ),
    var.extra_tags)
  }"]
}

如果没有覆盖默认值，那么第二个输出将标记 ASG：

explicit1 = value1
explicit2 = value2
interpolation1 = value3
interpolation2 = value4
Foo = Bar
Baz = Bam

如果您要通过 tfvar 覆盖 extra_tags，例如：

extra_tags = [
  {
    key = "CustomTag1"
    value = "CustomValue1"
    propagate_at_launch = true
  },
  {
    key = "CustomTag2"
    value = "CustomValue3"
    propagate_at_launch = true
  },
  {
    key = "CustomTag3"
    value = "CustomValue3"
    propagate_at_launch = true
  },
  {
    key = "CustomTag4"
    value = "CustomValue4"
    propagate_at_launch = true
  },
]

那么您的 ASG 将被标记为：

explicit1 = value1
explicit2 = value2
interpolation1 = value3
interpolation2 = value4
CustomTag1 = CustomValue1
CustomTag2 = CustomValue2
CustomTag3 = CustomValue3
CustomTag4 = CustomValue4

这使您可以选择拥有一些始终存在于 ASG 上的标签，以及在您的模块或其他任何东西之外完全定义的可选动态标签。