如何在 AWS Cloudformation 的 "outputs" 中获取子网的 "cidrblock"？

Question

我正在编写 AWS Code 格式。我必须打印子网的 Cidrblock。但这是行不通的。请帮助

"Resources": {
    "Subnet": {
          "Type": "AWS::EC2::Subnet",
          "Properties": {
            "VpcId": {
              "Ref": "VPC"
            },
            "CidrBlock": "10.0.0.0/16",
          }
    },
    Outputs : {
      "SubnetCIDR": {
          "Value": {
            "Fn::GetAtt": [
              "Subnet",
              "CidrBlock"
            ]
          },
          "Description": "The CIDR"
        },
    }

这不起作用。上传模板时显示以下错误消息：

Template validation error: Template error: resource Subnet does not support attribute type CidrBlock in Fn::GetAtt

Answer 1

不支持。

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-ec2-subnet.html

如果您查看文档，唯一支持的属性是 AvailabilityZone

Answer 2

由于您似乎对 CIDR 块进行了硬编码，因此您可以将其设置为参数，然后在两个地方都引用该参数。

"Parameters" : {
  "CidrBlock" : {
    "Type" : "String",
    "Default" : "10.0.0.0/16"
  }
},
"Resources" : {
  "Subnet" : {
    "Type" : "AWS::EC2::Subnet",
    "Properties" : {
      "VpcId" : {
        "Ref" : "VPC"
      },
      "CidrBlock" : { "Ref" : "CidrBlock" }
    }
  }
},
"Outputs" : {
  "SubnetCIDR" : {
    "Value" : { "Ref" : "CidrBlock" },
    "Description": "The CIDR"
  }
}

如何在 AWS Cloudformation 的 "outputs" 中获取子网的 "cidrblock"？

How get "cidrblock" of a subnet in the "outputs" of a AWS Cloudformation?

amazon-web-services

amazon-cloudformation