AWS 中的参数引用

Question

在我下面的代码中，我试图引用我为 EC2 实例创建 subnets\cidr 块而创建的参数。

我猜，因为我将 CFCidrVPC1 创建为字符串，而实际 IP 地址不是字符串。

我在这里遗漏了一些东西。

有人可以指导我吗？我尝试这样做的原因是将来重用代码。我还尝试在 Fn::Cidr 函数中使用 Ref 函数，但这也不起作用。所以用 cidr 块替换它。

我得到的错误是 "Value of property SubnetId must be of type String"。

请找到我的完整脚本：

{
  "AWSTemplateFormatVersion": "2010-09-09",
  "Description": "Creating template to deploy 3 ec2 instances in 3 different AZs",
  "Parameters": {
    "CFCidrVPC1": {
      "Type": "String",
      "Default": "10.10.0.0/16"
    },
    "CFCidrVPC2": {
      "Type": "String",
      "Default": "10.20.0.0/16"
    },
    "CFEC2Instancetype": {
      "Type": "String",
      "Default": "t2.micro",
      "Description": " Only t2.micro is available in the free tier account hence no any other options"
    }
  },
  "Resources": {
    "VPC1": {
      "Type": "AWS::EC2::VPC",
      "Properties": {
        "CidrBlock": {
          "Ref": "CFCidrVPC1"
        },
        "EnableDnsHostnames": "False",
        "EnableDnsSupport": "False",
        "InstanceTenancy": "default"
      }
    },
    "VPC2": {
      "Type": "AWS::EC2::VPC",
      "Properties": {
        "CidrBlock": {
          "Ref": "CFCidrVPC2"
        },
        "EnableDnsHostnames": "False",
        "EnableDnsSupport": "False",
        "InstanceTenancy": "default"
      }
    },
    "CFsubnet1": {
      "Type": "AWS::EC2::Subnet",
      "Properties": {
        "AvailabilityZone": {
          "Fn::Select": [
            "0",
            {
              "Fn::GetAZs": ""
            }
          ]
        },
        "CidrBlock": {
          "Fn::Select": [
            "0",
            {
              "Fn::Cidr": [
                "10.10.0.0/16",
                "2",
                "8"
              ]
            }
          ]
        },
        "VpcId": {
          "Ref": "CFCidrVPC1"
        }
      }
    },
    "CFsubnet2": {
      "Type": "AWS::EC2::Subnet",
      "Properties": {
        "AvailabilityZone": {
          "Fn::Select": [
            "0",
            {
              "Fn::GetAZs": ""
            }
          ]
        },
        "CidrBlock": {
          "Fn::Select": [
            "1",
            {
              "Fn::Cidr": [
                "10.10.0.0/16",
                "2",
                "8"
              ]
            }
          ]
        },
        "VpcId": {
          "Ref": "CFCidrVPC1"
        }
      }
    },
    "CFsubnet3": {
      "Type": "AWS::EC2::Subnet",
      "Properties": {
        "AvailabilityZone": {
          "Fn::Select": [
            "0",
            {
              "Fn::GetAZs": ""
            }
          ]
        },
        "CidrBlock": {
          "Fn::Select": [
            "0",
            {
              "Fn::Cidr": [
                "10.20.0.0/16",
                "2",
                "8"
              ]
            }
          ]
        },
        "VpcId": {
          "Ref": "CFCidrVPC2"
        }
      }
    },
    "CFsubnet4": {
      "Type": "AWS::EC2::Subnet",
      "Properties": {
        "AvailabilityZone": {
          "Fn::Select": [
            "0",
            {
              "Fn::GetAZs": ""
            }
          ]
        },
        "CidrBlock": {
          "Fn::Select": [
            "1",
            {
              "Fn::Cidr": [
                "10.10.0.0/16",
                "2",
                "8"
              ]
            }
          ]
        },
        "VpcId": {
          "Ref": "CFCidrVPC2"
        }
      }
    },
    "FirstECSinVPC1AZ1": {
      "Type": "AWS::EC2::Instance",
      "Properties": {
        "AvailabilityZone": {
          "Fn::Select": [
            "0",
            {
              "Fn::GetAZs": ""
            }
          ]
        },
        "ImageId": "ami-005bdb005fb00e791",
        "InstanceType": {
          "Ref": "CFEC2Instancetype"
        },
        "SubnetId": {
          "ref": "CFsubnet1"
        }
      }
    },
    "FirstECSinVPC1AZ2": {
      "Type": "AWS::EC2::Instance",
      "Properties": {
        "AvailabilityZone": {
          "Fn::Select": [
            "1",
            {
              "Fn::GetAZs": ""
            }
          ]
        },
        "ImageId": "ami-005bdb005fb00e791",
        "InstanceType": {
          "Ref": "CFEC2Instancetype"
        },
        "SubnetId": {
          "ref": "CFsubnet2"
        }
      }
    },
    "FirstECSinVPC2AZ1": {
      "Type": "AWS::EC2::Instance",
      "Properties": {
        "AvailabilityZone": {
          "Fn::Select": [
            "0",
            {
              "Fn::GetAZs": ""
            }
          ]
        },
        "ImageId": "ami-005bdb005fb00e791",
        "InstanceType": {
          "Ref": "CFEC2Instancetype"
        },
        "SubnetId": {
          "ref": "CFsubnet3"
        }
      }
    },
    "FirstECSinVPC2AZ2": {
      "Type": "AWS::EC2::Instance",
      "Properties": {
        "AvailabilityZone": {
          "Fn::Select": [
            "1",
            {
              "Fn::GetAZs": ""
            }
          ]
        },
        "ImageId": "ami-005bdb005fb00e791",
        "InstanceType": {
          "Ref": "CFEC2Instancetype"
        },
        "SubnetId": {
          "ref": "CFsubnet4"
        }
      }
    }
  }
}

Answer 1

cloudformation 中的所有内容都区分大小写。

你有：

"SubnetId": {
   "ref": "CFsubnet2"
    }

尝试：

"SubnetId": {
   "Ref": "CFsubnet2"
    }

对于所有事件。

AWS 中的参数引用

Parameter referencing in AWS

amazon-ec2

amazon-web-services

amazon-cloudformation

amazon-vpc