使用 cfn-init，ec2 实例在以下情况下不断停止

如何解决使用 cfn-init，ec2 实例在以下情况下不断停止

尝试使用 AWS Linux AMI 测试 cfn-init。实例正在创建但自动停止。即使我尝试手动启动实例，它也会立即自行停止。不知道我做错了什么，实例就这样停止了。我所做的就是尝试对此进行测试并使用 cfn-init 设置一个文件。这是从我在网上找到的模板中获取的。任何帮助表示赞赏。

{
    "AWstemplateFormatVersion": "2010-09-09","Parameters": {
        "VPC": {
            "Type": "AWS::EC2::VPC::Id","Description": "Select the VPC where the EC2 instances will be created","ConstraintDescription": "must be an existing VPC"
        },"Linuxsubnet": {
            "Type": "AWS::EC2::subnet::Id","Description": "Select subnet for Linux Instance","ConstraintDescription": "must be an existing subnet"
        },"RemoteAccessCIDR": {
            "Description": "CIDR block to allow access to linux instances","Type": "String","Default": "10.255.0.0/16","AllowedPattern": "(\\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."
        },"LinuxInstanceType": {
            "Default": "t2.micro","Description": "Amazon EC2 Linux Instance Type","Type": "String"
        },"LinuxSecurityGroupIds": {
            "Type": "String","Description": "Name of security group to use",},"LinuxSSHPort": {
            "Description": "SSH Port Number on Linux client","Type": "Number","Default": 22,"ConstraintDescription": "must be 22 or a number from 1024 to 65535"
        },"LinuxVolumeSize": {
            "Description": "Size of EBS volume for Linux instance in GB","Default": 8,"ConstraintDescription": "must be 8 or higher"
        },"KeyPair": {
            "Description": "Name of existing EC2 key pair for Linux Instances","Type": "AWS::EC2::KeyPair::KeyName"
        }
    },"Resources": {
        "TestMachine": {
            "Type": "AWS::EC2::Instance","Metadata": {
                "AWS::CloudFormation::Init": {
                    "configSets": {
                        "CreateStuff": "CreateFile"
                    },"CreateFile" : {
                        "files": {
                            "/tmp/testing.txt": {
                                "content": "hopefully this works","mode": "0755","owner": "root","group": "root"
                            }
                        }
                    }
                }
            },"Properties": {
                "ImageId": "ami-0533f2ba8a1995cf9","InstanceType": {
                    "Ref": "LinuxInstanceType"
                },"subnetId": {
                    "Ref": "Linuxsubnet"
                },"SecurityGroupIds": [{
                    "Ref": "LinuxSecurityGroupIds"
                }],"KeyName": {
                    "Ref": "KeyPair"
                },"Tags": [
                    {
                        "Key": "Automatic Patches","Value": "True"
                    },{
                        "Key": "Description","Value": "Service-Catalog-EC2-Reference-Architecture"
                    },{
                        "Key": "acr:CostCenter","Value": "986002"
                    },{
                        "Key": "acr:Project","Value": "aws infrastructure general"
                    },{
                        "Key": "Name","Value": "cfn-init-vm1"
                    }
                ],"BlockDeviceMappings": [
                    {
                        "DeviceName": "/dev/sda1","Ebs": {
                            "Encrypted": "true","DeleteOnTermination":"true","VolumeSize": {
                            "Ref": "LinuxVolumeSize"
                            }
                        }
                    }
                ],"UserData": {
                    "Fn::Base64" : { "Fn::Join" : ["",[
                        "#!/bin/bash -xe\n","yum install -y aws-cfn-bootstrap\n","# Install the files and packages from the Metadata\n","/opt/aws/bin/cfn-init -v ","         --stack ",{ "Ref" : "AWS::StackName" },"         --resource TestMachine ","         --configsets CreateStuff ","         --region ","us-east-1","\n"
                   ]]}
                }
            }
        }

    },"Outputs": {

    }

}