terraform从变量中获取参数名称

我怎样才能做到这一点

variable "vault_tag_name" {}
variable "vault_tag_value" {}


resource "aws_instance" "instance" {
  tags {
     Name  = "${var.name}"
     Group = "${var.group_tag}"
     "${var.vault_tag_name}" = "${var.vault_tag_value}"
  }
}

我没有terraform的错误，但结果是错误的

tags.${var.vault_tag_name}:                ""
tags.%:                                    "3"
tags.Group:                                "test-dev"
tags.Name:                                 "test-dev"

根据，动态变量名此时在HCL中是不可能的

您可以使用zipmap来模拟这一点，尽管这有点笨重

locals {
  ec2_tag_keys = ["Name", "Group", "${var.vault_tag_name}"]
  ec2_tag_vals = ["${var.name}", "${var.group_tag}", "${var.vault_tag_value}"]
}

resource "aws_instance", "instance" {
  ...
  tags = "${zipmap(local.ec2_tag_keys, local.ec2_tag_vals)}"
}

结果

+ aws_instance.instance
      tags.%:                       "3"
      tags.Group:                   "MyGroup"
      tags.Name:                    "MyName"
      tags.MyTagName:               "MyTagValue"