amazon-web-services - 地形错误: Incorrect attribute value type for subnet_ids vpc modules

Question

我在版本12.24中运行Terraform Plan时遇到错误:属性值类型不正确。

Error: Incorrect attribute value type

  on .terraform/modules/app/main.tf line 134, in resource "aws_db_subnet_group" "db_subnet_group":
 134:   subnet_ids  = var.subnets
    |----------------
    | var.subnets is list of tuple with 1 element

Inappropriate value for attribute "subnet_ids": incorrect set element type:
string required.

tf文件中的代码:

resource "aws_db_subnet_group" "db_subnet_group" {
  count = "${var.create_subnet_group ? 1 : 0}"

  name_prefix = "${var.name}-"
  description = "Database subnet group for ${var.name}"
  subnet_ids  = var.subnets

variables.tf文件:

variable "subnets" {
  description = "Subnets for RDS Instances"
  type        = "list"
}

我该如何解决？

Answer 1

错误消息表明您具有list of tuple with 1 element，这意味着var.subnets的形式为:

variable "subnets" {
  description = "Subnets for RDS Instances"
  type        = "list"
  default = [["subnet-070db0eee8c5f3bb1", "subnet-01e76559b44d06aa3"]]
}

因此，要使用内部列表(即元组)，您必须执行以下操作:

resource "aws_db_subnet_group" "db_subnet_group" {
  
  # other attributes not shown

  subnet_ids  = var.subnets[0]
}