amazon-web-services - 参数: [KeyPair] must have values

Question

我正在尝试使用 cloudformation 镜像我的 EC2 实例。目前，我已经能够使用对流层创建以下 JSON，但遇到错误“参数:[KeyPair] 必须有值”。我不确定这个“值(value)观”必须是什么？

我理解错误，但不确定解决方案是什么。

{
    "Outputs": {
        "InstanceAccess": {
            "Description": "",
            "Value": {
                "Fn::Join": [
                    "",
                    [
                        "ssh -i ",
                        {
                            "Ref": "KeyPair"
                        },
                        " ubuntu@",
                        {
                            "Fn::GetAtt": [
                                "MyInstance",
                                "PublicDnsName"
                            ]
                        }
                    ]
                ]
            }
        }
    },
    "Parameters": {
        "KeyPair": {
            "Description": "jj",
            "Type": "AWS::EC2::KeyPair::launch"
        }
    },
    "Resources": {
        "MyInstance": {
            "Properties": {
                "ImageId": "< my image id goes here>",
                "InstanceType": "t1.micro",
                "KeyName": {
                    "Ref": "KeyPair"
                },
                "SecurityGroups": [
                    {
                        "Ref": "SecurityGroup"
                    }
                ]
            },
            "Type": "AWS::EC2::Instance"
        },
        "SecurityGroup": {
            "Properties": {
                "GroupDescription": "Allow access to MyInstance",
                "SecurityGroupIngress": [
                    {
                        "CidrIp": "0.0.0.0/0",
                        "FromPort": "22",
                        "IpProtocol": "tcp",
                        "ToPort": "22"
                    },
                    {
                        "CidrIp": "0.0.0.0/0",
                        "FromPort": "80",
                        "IpProtocol": "tcp",
                        "ToPort": "80"
                    },
                    {
                        "CidrIp": "0.0.0.0/0",
                        "FromPort": "8080",
                        "IpProtocol": "tcp",
                        "ToPort": "8080"
                    },
                    {
                        "CidrIp": "0.0.0.0/0",
                        "FromPort": "443",
                        "IpProtocol": "tcp",
                        "ToPort": "443"
                    }
                ]
            },
            "Type": "AWS::EC2::SecurityGroup"
        }
    }
}

Answer 1

您的 KeyPair 参数应该具有有效的类型。根据Parameters CloudFormation User Guide 部分，KeyPair 参数的类型为 AWS::EC2::KeyPair::KeyName。所以它应该看起来像这样:

"KeyPair": {
  "Description": "The name of the keypair to use for SSH access",
  "Type": "AWS::EC2::KeyPair::KeyName"
}

此外，如果您在模板中将 key 对名称声明为参数，则在使用该模板创建堆栈时必须将现有 key 对名称作为参数传递。