amazon-web-services - Terraform:如何从一个资源 block 创建多个 aws 子网？

Question

我试图从一个资源 block 创建多个子网，但出现以下错误

Error: aws_subnet.private: cidr_block must be a single value, not a list

ma​​in.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}"
  }
}

变量.tf

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

dev.tfvars

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

Answer 1

您必须创建多个 aws_subnet 资源，方法是利用 count 参数为您的 var.private_subnet 列表中的每个条目创建一个资源:

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
}

这将单个 aws_subnet 资源扩展为两个，当每个资源 block 由 terraform 评估时，每个资源基于 count 的枚举具有略微不同的值。