Terraform可选嵌套对象变量

variable "server" {
  type = object({
    name     = string
    cpu      = number
    memory   = number
    disk     = number
    network  = object({
      subnet  = string
      security_group = string
    })
  })
  default = {
    name    = "web-server"
    cpu     = 2
    memory  = 4
    disk    = 100
    network = {
      subnet  = "subnet-123456"
      security_group = "sg-abcdef"
    }
  }
}

resource "aws_instance" "example" {
  ami           = "ami-0c55b159cbfafe1f0"
  instance_type = var.server.cpu > 2 ? "t2.medium" : "t2.micro"
  subnet_id     = var.server.network.subnet
  security_group_ids = [var.server.network.security_group]
}