通过Terraform配置AWS_MQ_BRORK时，如何设置Deployment_Mode？

Question

我正在尝试通过Terraform为Amazon MQ经纪人提供。我已经编写了用于部署类型的多AZ部署的代码，为Active_standby_multi_az。现在，我想使用Single_instance部署类型在测试环境中提供MQ经纪。因此，我参数化了deployment_mode字段并传递变量中的值。

这是我的变量列表：

variable "enviroment" {
  default = "test"
}
variable "mq_multiAZ" {
  default = "SINGLE_INSTANCE"
}

当我将变量（mq_multiaz）值替换为“ Active_standby_multi_az”时，以下代码绝对正常工作。但是，它无法与可变值“ single_instance”一起使用。另外，请注意 - 我们需要2个子网“ Active_standby_multi_az”部署，我们不能提及单个子网来工作“ single_instance”部署。

MQ_BROKER.TF：

  resource "aws_mq_broker" "mymq_broker" {
  broker_name = "${var.enviroment}-broker"
  engine_type          = "ActiveMQ"
  engine_version       = "5.15.9"
  host_instance_type   = "mq.t2.micro"
  deployment_mode      = "${var.mq_multiAZ}"
  publicly_accessible  = false
  apply_immediately    = false
  security_groups      = [aws_security_group.amazon_mq.id]
  subnet_ids = [
    data.aws_subnet.AppSubnetA.id,
    data.aws_subnet.AppSubnetB.id,
  ]

  user {
    username = "${var.mq_master_user}"
    password = "${var.mq_master_pwd}"
    console_access = true
  }

  logs {
    general = true
  }

  maintenance_window_start_time {
    day_of_week = "SUNDAY"
    time_of_day = "02:00"
    time_zone   = "UTC"
  }

  tags = {
    Environment = "${var.enviroment}"
    Name        = "${var.enviroment}-broker"
  }
}

我要为“ Single_instance”部署遇到的错误：

 Error: BadRequestException: Specify a single subnet in [SINGLE_INSTANCE] deployment mode.
 {
   RespMetadata: {
     StatusCode: 400,
     RequestID: "716aafdf-578a-4eb7-bfe4-f0f08998b6db"
   },
   ErrorAttribute: "subnetIds",
   Message_: "Specify a single subnet in [SINGLE_INSTANCE] deployment mode."
 }

   with aws_mq_broker.empays_broker,
   on amazonMQ.tf line 1, in resource "aws_mq_broker" "empays_broker":
    1: resource "aws_mq_broker" "empays_broker" {