Question

我的CFN模板遇到问题。我在参数中定义了一个CIDR块，并希望将其用作安全组资源中的CidrIp。

然而，当我运行我的堆栈时，我收到Value of property CidrIp must be of type String错误，堆栈正在回滚。

这是我最小的失败模板。我想使用VPCCidrBlock来定义CidrIp。

有趣的是，AWS样本模板LAMP_Multi_AZ完全相同。

{
  "AWSTemplateFormatVersion": "2010-09-09",
  "Description": "A cloud VPC",
  "Metadata": {
  },
  "Resources": {
    "myvpc": {
      "Type": "AWS::EC2::VPC",
      "Properties": {
        "CidrBlock": {
          "Ref": "VPCCidrBlock"
        }
      }
    },
    "SipserverSecurityGroup": {
      "Type": "AWS::EC2::SecurityGroup",
      "Properties": {
        "GroupDescription": "Enable VPC access",
        "VpcId": {
          "Ref": "myvpc"
        },
        "SecurityGroupIngress": [
          { "IpProtocol": "tcp", "FromPort": "22", "ToPort": "22", "CidrIp": { "Ref": "VPCCidrBlock" } },
          { "IpProtocol": "udp", "FromPort": "5060", "ToPort": "5060", "CidrIp": { "Ref:": "VPCCidrBlock" } }
        ]
      }
    }
  },
  "Parameters": {
    "VPCCidrBlock": {
      "Description": "Main CIDR block for the whole VPC",
      "Type": "String",
      "MinLength": "9",
      "MaxLength": "18",
      "Default": "10.13.0.0/16",
      "AllowedPattern": "(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})/(\\d{1,2})",
      "ConstraintDescription": "must be a valid IP CIDR range of the form x.x.x.x/x."
    }
  }
}

Answer 1

奇怪的问题。和你的例子一起玩了一下。

{
  "AWSTemplateFormatVersion": "2010-09-09",
  "Description": "A cloud VPC",
  "Metadata": {
  },
  "Resources": {
    "myvpc": {
      "Type": "AWS::EC2::VPC",
      "Properties": {
        "CidrBlock": {
          "Ref": "VPCCidrBlock"
        }
      }
    },
    "SipserverSecurityGroup": {
      "Type": "AWS::EC2::SecurityGroup",
      "Properties": {
        "GroupDescription": "Enable VPC access",
        "VpcId": {
          "Ref": "myvpc"
        },
        "SecurityGroupIngress": [
          { "IpProtocol": "tcp", "FromPort": "22", "ToPort": "22", "CidrIp": {"Ref": "VPCCidrBlock"}},
          { "IpProtocol": "udp", "FromPort": "5060", "ToPort": "5060", "CidrIp": {"Ref": "VPCCidrBlock"}}
        ]
      }
    }
  },
  "Parameters": {
    "VPCCidrBlock": {
      "Description": "Main CIDR block for the whole VPC",
      "Type": "String",
      "MinLength": "9",
      "MaxLength": "18",
      "Default": "10.13.0.0/16",
      "AllowedPattern": "(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})/(\\d{1,2})",
      "ConstraintDescription": "must be a valid IP CIDR range of the form x.x.x.x/x."
    }
  }
}

适合我。某些特殊字符/编码是否存在问题？

Answer 2

我也遇到了类似的问题，我可以指出这个问题。我使用“ref”而不是“Ref”来引用参数。

Answer 3

我有另一个YAML文件，出现了同样的问题“属性CidrIp的值必须为String类型。”事实证明，下面的双引号需要更改为单引号。

HTTPTargetGroup:
    Type: AWS::ElasticLoadBalancingV2::TargetGroup
    Properties:
      Name: !Sub "${Foo}-${Bar}-TargetGroup" # -> Error
      Name: !Sub '${Foo}-${Bar}-TargetGroup' # -> Good

Answer 4

在YAML配置的情况下，我们可以轻易忽略的一件事是数据类型定义。在我的Yaml cloudformation模板中，我犯了同样的错误。在ECS ElasticLoadBalancingV2资源配置中指定VpcId之前，我输入了破折号。这使得VpcId属性在实际上应为字符串时看起来像是值列表。反过来，我收到cloudformation错误，提示“ VpcId应该是字符串。”

定义不正确：（第5行开头的破折号）

TargetGroup:
  Type: AWS::ElasticLoadBalancingV2::TargetGroup
  Properties:
    VpcId:
      - Fn::ImportValue: !Join ['-', ["somestring", !Ref Environment, 'someregion', 'VPC']]

正确的定义：

TargetGroup:
  Type: AWS::ElasticLoadBalancingV2::TargetGroup
  Properties:
    VpcId: Fn::ImportValue: !Join ['-', ["somestring", !Ref Environment, 'someregion', 'VPC']]

＆＃34;属性值CidrIp必须是String＆＃34; cloudformation

4 个答案: