Error: Incorrect attribute value type - Terraform datasource(aws_ip_ranges)

Question

当我尝试使用 terraform 数据源 (aws_ip_ranges) 获取服务 "ec2" 的可用 IP 地址范围时出现错误。

provider "aws" {
   region = "${var.AWS_REGION}"
}
variable "AWS_REGION" {
   default = "eu-west-1"
}

data "aws_ip_ranges" "european_ec2" {
   regions = [ "eu-west-1" ]
   services = [ "ec2" ]
}
resource "aws_security_group" "from_europe" {
  name = "from_europe"
  ingress {
    from_port = "443"
    to_port = "443"
    protocol = "tcp"
    cidr_blocks = [ "${data.aws_ip_ranges.european_ec2.cidr_blocks}" ]
}
tags = {
  CreateDate = "${data.aws_ip_ranges.european_ec2.create_date}"
  SyncToken = "${data.aws_ip_ranges.european_ec2.sync_token}"
}
}

执行时出现以下错误 "terraform apply"

  Error: Incorrect attribute value type

   on securitygroups.tf line 13, in resource "aws_security_group" 
 "from_europe":
  13:     cidr_blocks      = 
  ["${data.aws_ip_ranges.european_ec2.cidr_blocks}"]

  Inappropriate value for attribute "cidr_blocks": element 0: string 
  required.

版本： Terraform v0.12.6 + provider.aws v2.23.0

请帮忙解决这个问题。

Answer 1

在 Terraform 0.12 中，参数的冗余数组大括号语法从必需变为错误。您可以更新代码并相应地使用第一个 class 变量表达式来解决问题：

resource "aws_security_group" "from_europe" {
  name = "from_europe"

  ingress {
    from_port   = "443"
    to_port     = "443"
    protocol    = "tcp"
    cidr_blocks = data.aws_ip_ranges.european_ec2.cidr_blocks
  }
}