Question

我正在尝试从一个资源块创建多个子网，但出现以下错误

错误：aws_subnet.private：cidr_block必须是单个值，而不是列表

main.tf

resource "aws_subnet" "private" {
  vpc_id                  = "${aws_vpc.vpcname.id}"
  cidr_block              = "${var.private_subnet}"
  availability_zone       = "${data.aws_availability_zones.available.names[count.index]}"
  map_public_ip_on_launch = false

  tags {
    Name        = "${var.private}"
    Environment = "${terraform.workspace}"
  }
}

variable.tf

variable "private_subnet" {
  type    = "list"
  default = []
}

dev.tfvars

private_subnet = ["10.0.2.0/24", "10.0.3.0/24"]

Answer 1

您必须通过利用aws_subnet参数为count列表中的每个条目创建一个资源来创建多个var.private_subnet资源：

resource "aws_subnet" "private" {
  count                   = "${length(var.private_subnet)}"
  vpc_id                  = "${aws_vpc.vpcname.id}"
  cidr_block              = "${var.private_subnet[count.index]}"
  availability_zone       = "${data.aws_availability_zones.available.names[count.index]}"
  map_public_ip_on_launch = false
}

这会将单个aws_subnet资源扩展为两个，当每个资源块通过terraform求值时，基于count的枚举，每个资源的值会略有不同。

Answer 2

private_subnet是一个列表，因此您应该选择一个元素，例如

cidr_block = "${element(var.private_subnet,count.index)}"

Terraform：如何从一个资源块创建多个AWS子网？

2 个答案: