云的形成-设备索引不能为空答案

【问题标题】：Cloud formation - Device index cannot be empty云的形成-设备索引不能为空
【发布时间】：2018-10-16 06:38:23
【问题描述】：

我一直在尝试让两个实例加入域，一个成为 dc。该代码来自其中一个模板，但是它不允许我在修改后运行它。当 DC01 实例启动时，我收到错误 DeviceIndex 不能为空。这是 DC01 的代码

 {
    "Resources": {
        "DC1": {
            "Type": "AWS::EC2::Instance",
            "Properties": {
                "BlockDeviceMappings": [
                    {
                        "DeviceName": "/dev/sda1",
                        "Ebs": {
                            "VolumeSize": "40"
                        }
                    }
                ],
                "ImageId": {
                    "Ref": "BaseAmiId"
                },
                "InstanceType": "t2.micro",
                "KeyName": {
                    "Ref": "KeyName"
                },
                "NetworkInterfaces": [
                    {
                        "AssociatePublicIpAddress": "false",
                        "DeleteOnTermination": "true",
                        "DeviceIndex": "0",
                        "GroupSet": [
                            {
                                "Ref": "PrivateSecurityGroup"
                            }
                        ],
                        "PrivateIpAddress": "10.1.3.100"
                    },
                    {
                        "SubnetId": {
                            "Ref": "PrivateSubnetAZ1"
                        }
                    }
                ],
                "Tags": [
                    {
                        "Key": "Name",
                        "Value": "DC1"
                    }
                ],
                "UserData": {
                    "Fn::Base64": {
                        "Fn::Join": [
                            "",
                            [
                                "<script>\n",
                                "cfn-init.exe -v -c config -s ",
                                {
                                    "Ref": "AWS::StackId"
                                },
                                " -r DC1",
                                " --region ",
                                {
                                    "Ref": "AWS::Region"
                                },
                                "\n",
                                "</script>\n"
                            ]
                        ]
                    }
                }
            }
        }
    }
}

【问题讨论】：

标签： json amazon-web-services amazon-ec2 amazon-cloudformation

【解决方案1】：

您已经在网络接口中创建了 json 格式。所以，它正在考虑第二个。请尝试以下代码 sn-p。

{
    "Resources": {
        "DC1": {
            "Type": "AWS::EC2::Instance",
            "Properties": {
                "BlockDeviceMappings": [
                    {
                        "DeviceName": "/dev/sda1",
                        "Ebs": {
                            "VolumeSize": "40"
                        }
                    }
                ],
                "ImageId": {
                    "Ref": "BaseAmiId"
                },
                "InstanceType": "t2.micro",
                "KeyName": {
                    "Ref": "KeyName"
                },
                "NetworkInterfaces": [
                    {
                        "SubnetId": {
                            "Ref": "PrivateSubnetAZ1"
                        },
                        "AssociatePublicIpAddress": "false",
                        "DeleteOnTermination": "true",
                        "DeviceIndex": "0",
                        "GroupSet": [
                            {
                                "Ref": "PrivateSecurityGroup"
                            }
                        ],
                        "PrivateIpAddress": "10.1.3.100"
                    }
                ],
                "Tags": [
                    {
                        "Key": "Name",
                        "Value": "DC1"
                    }
                ],
                "UserData": {
                    "Fn::Base64": {
                        "Fn::Join": [
                            "",
                            [
                                "<script>\n",
                                "cfn-init.exe -v -c config -s ",
                                {
                                    "Ref": "AWS::StackId"
                                },
                                " -r DC1",
                                " --region ",
                                {
                                    "Ref": "AWS::Region"
                                },
                                "\n",
                                "</script>\n"
                            ]
                        ]
                    }
                }
            }
        }
    }
}

解决问题

【讨论】：