AWS Lambda external URI request error: connect ETIMEDOUT

Question

我在本地开发环境中编写了一个 node.js 函数，该函数对外部 url-uri 执行多个请求（异步使用 bluebird 和 request-promise）。它工作正常，函数获取结果并将信息保存到 EC3 数据库中。

当我部署代码（包括节点模块）并执行它时，问题就来了。它可以访问数据库，但是当尝试访问外部 url-uri 时，'request-promise' 模块会出现 'connect ETIMEDOUT' 错误。

我按照 AWS 指示进行了所有操作，阅读并尝试了我在 Whosebug 中找到的所有解决方案，但问题仍然存在。

https://www.youtube.com/watch?v=AR1nt3iGR5o

运行该函数的相关角色具有以下策略：

AWSLambdaFullAccess - AWSCodeDeployRoleForLambda - AmazonVPCFullAccess - AWSLambdaExecute - AWSLambdaBasicExecutionRole - AWSLambdaVPCAccessExecutionRole - AWSLambdaRole - oneClick_lambda_basic_execution_1535968782861

Function Network Config

Nat getway

Route Table

你能帮帮我吗，或者至少给个提示好吗？

代码：

const Promise = require('bluebird');
const Rp = require('request-promise');
const http = require('http');

var httpAgent = new http.Agent();
httpAgent.maxSockets = 15;

var promises = urls.map(function(url){
  return Rp({uri: url.url, pool:httpAgent}).then(function(result){
      url.result = result;
      // Saving space
      delete url.url;
      return url;
  })

});


Promise.all(promises).then(function(results){
    return(processResults(results));
}).catch(Error, function (e) {
    console.error("Error doing Request: ", e);
}).error(function (e) {
    console.error("Unable get info: ", e);
}).then(function(results){
    try{
        product.callback(results);
    }catch (exception) {
        console.error('Error callback: ',exception);   
    }
}).then(function(){
    product.finally();
});

错误：

2018-09-28T14:53:48.989Z    efb5493a-c32d-11e8-ae42-f73dec33ca2a    Error doing Request: { RequestError: Error: connect ETIMEDOUT 147.83.184.65:80
at new RequestError (/var/task/node_modules/request-promise-core/lib/errors.js:14:15)
at Request.plumbing.callback (/var/task/node_modules/request-promise-core/lib/plumbing.js:87:29)
at Request.RP$callback [as _callback] (/var/task/node_modules/request-promise-core/lib/plumbing.js:46:31)
at self.callback (/var/task/node_modules/request/request.js:185:22)
at emitOne (events.js:116:13)
at Request.emit (events.js:211:7)
at Request.onRequestError (/var/task/node_modules/request/request.js:881:8)
at emitOne (events.js:116:13)
at ClientRequest.emit (events.js:211:7)
at Socket.socketErrorListener (_http_client.js:387:9)
at emitOne (events.js:116:13)
at Socket.emit (events.js:211:7)
at emitErrorNT (internal/streams/destroy.js:64:8)
at _combinedTickCallback (internal/process/next_tick.js:138:11)
at process._tickDomainCallback (internal/process/next_tick.js:218:9)
name: 'RequestError',
message: 'Error: connect ETIMEDOUT 147.83.184.65:80',
cause: 
{ Error: connect ETIMEDOUT 147.83.184.65:80
at Object._errnoException (util.js:1022:11)
at _exceptionWithHostPort (util.js:1044:20)
at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1198:14)
code: 'ETIMEDOUT',
errno: 'ETIMEDOUT',
syscall: 'connect',
address: '147.83.184.65',
port: 80 },
error: 
{ Error: connect ETIMEDOUT 147.83.184.65:80
at Object._errnoException (util.js:1022:11)
at _exceptionWithHostPort (util.js:1044:20)
at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1198:14)
code: 'ETIMEDOUT',
errno: 'ETIMEDOUT',
syscall: 'connect',
address: '147.83.184.65',
port: 80 },
options: 
{ uri: 'http://geoserver.hydsdev.net/geoserver/mhews/wms?SERVICE=WMS&VERSION=1.1.1&REQUEST=GetFeatureInfo&FORMAT=image%2Fjpeg&TRANSPARENT=true&INFO_FORMAT=text%2Fxml&FEATURE_COUNT=50&X=50&Y=50&SRS=EPSG%3A4326&WIDTH=101&HEIGHT=101&QUERY_LAYERS=mhews:ffews_rain_accumulation_15min_opera&LAYERS=mhews:ffews_rain_accumulation_15min_opera&BBOX=0.6319608%2C42.770155%2C0.8319608%2C42.870155000000004&TIME=2018-09-28T17:30:00.000Z',
pool: 
Agent {
domain: null,
_events: [Object],
_eventsCount: 1,
_maxListeners: undefined,
defaultPort: 80,
protocol: 'http:',
options: [Object],
requests: {},
sockets: {},
freeSockets: {},
keepAliveMsecs: 1000,
keepAlive: false,
maxSockets: 15,
maxFreeSockets: 256,
'http:': [Object] },
callback: [Function: RP$callback],
transform: undefined,
simple: true,
resolveWithFullResponse: false,
transform2xxOnly: false },
response: undefined }

干杯。

Answer 1

我终于解决了这个问题。不知道为什么，但我必须将 'request-promise' 选项对象放入： headers: {'User-Agent':'request' } 。非常感谢@Rajesh！

AWS Lambda external URI request error: connect ETIMEDOUT

AWS Lambda external URI request error: connect ETIMEDOUT

node.js

amazon-web-services

aws-lambda

request-promise