amazon-web-services - 云信息 AWS : Assign an ip address to a CustomerGateway using parameters

Question

我正在设计一个cloudformation模板，但我需要将源IP定义为参数

我尝试将参数定义为字符串，但它产生以下错误:

Value (${MyCustomerGateway}) for parameter ipAddress is invalid. Invalid Format. (Service: AmazonEC2; Status Code: 400; Error Code: InvalidParameterValue; Request ID: 4de02112-fb1f-47a1-931c-97727568df99)

这是模板的片段:

Parameters:
  MyCustomerGateway:
    Description: IpAddress.
    Default: 0.0.0.0
    Type: String  

Resources:
  CustomerGateway_1:
    Type: 'AWS::EC2::CustomerGateway'
    Properties:
      Type: ipsec.1
      BgpAsn: 3352
      IpAddress: ${MyCustomerGateway} 
      Tags:
        - Key: Name
          Value: CustomerGateway_1

IP转换有什么特殊的数据吗？

我不确定哪个是正确的方法

Answer 1

将 IpAddress: ${MyCustomerGateway} 更改为 IpAddress: !Ref myCustomerGateway

更多关于Ref :

The intrinsic function Ref returns the value of the specified parameter or resource.

> When you specify a parameter's logical name, it returns the value of the parameter.

When you specify a resource's logical name, it returns a value that you can typically use to refer to that resource, such as a physical ID.

奖金:

如果您想验证参数输入，可以使用 AllowedPattern属性。

用法:

PrimaryIPAddress:
    Type: String
    Description: This must be a valid IP address.
    AllowedPattern: (\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})
    ConstraintDescription: must be a valid IP address of the form x.x.x.x.

输入无效 IP 时出错: