Question

我正在尝试从S3公共存储桶访问一个对象，但是在执行我的Cfn-init帮助程序脚本时我遇到了以下错误：

ConnectionError Traceback（最近一次调用最后一次）：文件＆＃34; cfnbootstrap \ util.pyc＆＃34;，第162行，在_retry文件＆＃34; cfnbootstrap \ util.pyc＆＃34;，第234行，_timeout ConnectionError :(＆＃39;连接已中止。＆＃39;，错误（10060，＆＃39;连接尝试失败，因为连接方在一段时间后未正确响应，或已建立的连接因连接主机发生故障而失败）回应＆＃39;）＆＃34;

如果我实例化RDP并在浏览器中更改代理设置，我可以访问S3存储桶。

以下是我的代码：

 "Resources": {
    "WebServer": {
        "Type" : "AWS::EC2::Instance",
        "Metadata": {
            "AWS::CloudFormation::Authentication": {
                "S3AccessCreds": {
                    "type": "S3",
                    "roleName": "sit-test-user",
                    "buckets" : ["sit-test-bucket"]
                }
            },
            "AWS::CloudFormation::Init": {
                "config": {
                    "sources": {
                        "c:\\S3\\xxxx" : "https://s3-ap-southeast-2.amazonaws.com/xxxxxxx/xxxxxx.ps1"
                    }
                }
            }
        },



"UserData" : {
              "Fn::Base64" : { 
                  "Fn::Join" : ["", [
                  "<script>\n",
                    "cfn-init.exe -s ", 
                    {"Ref" : "AWS::StackId"}, 
                    " -r WebServer --region ", 
                    {"Ref" : "AWS::Region"},
                    " --http-proxy http://proxy.aws.xxxxxx.local:8080 \n",
                "</script>\n"
                ]]
            }
        }

Answer 1

我遇到相同的错误，直到相同的错误行号。就我而言，我是将实例启动到专用子网中，然后尝试在UserData中执行各种配置命令并从S3（无VPC端点）下载。但是，我的子网没有通往Internet的路由。为了解决这个问题，我做到了：

在我的CloudFormation模板中，将路由表关联添加到指向NAT网关的路由表：

import 'dart:async';
import 'dart:math';

import 'package:flutter/material.dart';
import 'package:flutter/rendering.dart';

void main() => runApp(App());

class App extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Demo',
      theme: ThemeData(
        primarySwatch: Colors.green,
      ),
      initialRoute: '/',
      routes: <String, WidgetBuilder>{
        '/': (BuildContext context) => MyWidget(),
      },
    );
  }
}

class MyWidget extends StatefulWidget {
  MyWidget({Key key}) : super(key: key);

  final String title = "Demo";

  @override
  _State createState() => _State();
}

class _State extends State<MyWidget> {
  List<String> _items = [];

  Future<Null> getData(String searchTerm) async {
    final entriesToAdd = render(searchTerm);
    setState(() {
      _items = entriesToAdd;
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(
          title: TextField(
            onSubmitted: getData,
            decoration:
                InputDecoration(hintText: 'Search', icon: Icon(Icons.search)),
          ),
        ),
        body: Center(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: <Widget>[
              Expanded(
                  child: ListView.builder(
                      itemCount: _items.length,
                      itemBuilder: (context, index) {
                        return Container(
                            padding: EdgeInsets.all(8.0), child: Entry(data: _items[index]));
                      })),
            ],
          ),
        ));
  }
}

class Entry extends StatefulWidget {
  Entry({Key key, @required this.data}) : super(key: key);

  final String data;

  @override
  _EntryState createState() => _EntryState(data);
}

class _EntryState extends State<Entry> {
  _EntryState(this.data) : super();
  final String data;

  @override
  Widget build(BuildContext context) {
    return Text(data);
  }
}


List<String> render(String searchTerm) {
  final Random rng = new Random();
  final String date = DateTime.now().toString();
  return List<String>.generate(
    rng.nextInt(10),
    (int i) => '$searchTerm $i $date',
  );
}

添加了出站安全组规则以允许TCP 443以及我的UserData需要的其他任何内容：

AssocANat:
Type: 'AWS::EC2::SubnetRouteTableAssociation'
DependsOn:
  - SubnetA
  - RouteTableNATGatewayA
Properties:
  RouteTableId: !Ref RouteTableNATGatewayA
  SubnetId: !Ref SubnetA

UserData在访问s3存储桶时发出超时错误

1 个答案: