如何有条件地创建aws_eip和aws_eip_association？

Question

我需要有条件地创建EIP并将其关联到实例：

resource "aws_eip" "gateway" {
  vpc = true

  tags = {
    Name = "${var.project_id}-gateway"
    Project = "${var.project_id}"
    user = "${var.user}"
  }
}

resource "aws_eip_association" "eip_assoc_gateway" {
  instance_id   = aws_instance.gateway.id
  allocation_id = aws_eip.gateway.id
}

resource "aws_instance" "gateway" {
...
}

不幸的是，aws_eip和aws_eip_association似乎不支持count属性，所以我不清楚这是否可能？

有什么想法吗？

Answer 1

正如注释中提到的，所有Terraform原语资源都支持count。下面是aws_eip的示例：

resource "aws_eip" "eip" {
  instance   = "${element(aws_instance.manager.*.id,count.index)}"
  count = "${var.eip_count}"
  vpc = true

}