terraform - 如何将标签映射应用到 aws_autoscaling_group？

Question

https://www.terraform.io/docs/providers/aws/r/autoscaling_group.html#propagate_at_launch

我这样做是为了将标签应用于 aws 资源:

  tags = "${merge(
    local.common_tags, // reused in many resources
    map(
      "Name", "awesome-app-server",
      "Role", "server"
    )
  )}"

但是asg需要propagate_at_launch字段。

我已经在许多其他资源中使用了标签 map ，并且我想将其重新用于 asg 资源。很确定我将始终将propagate_at_launch设置为true。如何将其添加到 map 的每个元素并将其用于 tags 字段？

Answer 1

我使用空资源来执行此操作，并将其输出作为标签，示例如下 -

data "null_data_source" "tags" {
  count = "${length(keys(var.tags))}"

  inputs = {
    key                 = "${element(keys(var.tags), count.index)}"
    value               = "${element(values(var.tags), count.index)}"
    propagate_at_launch = true
  }
}


resource "aws_autoscaling_group" "asg_ec2" {
    ..........
    ..........

    lifecycle {
    create_before_destroy = true
    }

    tags = ["${data.null_data_source.tags.*.outputs}"]
    tags = [
      {
      key                 = "Name"
      value               = "awesome-app-server"
      propagate_at_launch = true
       },
      {
      key                 = "Role"
      value               = "server"
      propagate_at_launch = true
      }
    ]
}

您可以将 var.tags 替换为 local.common_tags。

IMPORTANT UPDATE for Terraform 0.12+. It now supports dynamic nested blocks and for-each. If you are on 0.12+ version, use below code -

resource "aws_autoscaling_group" "asg_ec2" {
    ..........
    ..........

    lifecycle {
    create_before_destroy = true
    }

  tag {
    key                 = "Name"
    value               = "awesome-app-server"
    propagate_at_launch = true
  }

  tag {
    key                 = "Role"
    value               = "server"
    propagate_at_launch = true
  }

  dynamic "tag" {
    for_each = var.tags

    content {
      key    =  tag.key
      value   =  tag.value
      propagate_at_launch =  true
    }
  }

}