如何将子网列表传递给'subnets'属性？

Question

我正在重写我的子网代码，使其更加灵活并由参数驱动：

resource "aws_subnet" "private" {
count             = "${var.az_count}"
cidr_block        = "${cidrsubnet(aws_vpc.ecs.cidr_block, 8, count.index)}"
availability_zone = "${data.aws_availability_zones.available.names[count.index]}"
vpc_id            = "${aws_vpc.ecs.id}"
}

这是将子网传递给的旧代码

resource "aws_ecs_service" "service" {
network_configuration {
subnets = [ "${aws_subnet.subnet1.id}", "${aws_subnet.subnet2.id}" ]
...
}

如何将子网 ID 从aws_subnet.private传递到subnets属性？

我试过了

subnets = ${aws_subnet.priate[*].id}

但是有一个错误：

Expected the start of an expression, but found an invalid expression token

Answer 1

首先，您可以删除 ${}，除非在内插的情况下。删除这些东西，您将拥有更具可读性：

resource "aws_subnet" "private" {
count             = var.az_count
cidr_block        = cidrsubnet(aws_vpc.ecs.cidr_block, 8, count.index)
availability_zone = data.aws_availability_zones.available.names[count.index]
vpc_id            = aws_vpc.ecs.id
}

您使用 splat 的参考语法是正确的，并且您的拼写是错误的。试试这个：

subnets = aws_subnet.private[*].id

板片参考： https://www.terraform.io/docs/configuration/expressions.html#splat-expressions