AWS Elastic Beanstalk / NodeJS / Nginx错误：不断收到502错误的网关

Question

我已经多次部署了Web应用程序，并且运行良好。

但自从昨天部署以来，无论何时尝试获取网站，我都会不断收到502 Bad Gateway。

我从AWS Elastic beantalk终止了我的应用程序，然后重新创建，但仍然遇到502错误的网关。

这是我的nodejs.log：

Error: ENOENT: no such file or directory, open '/var/app/current/config/awsconfig.json'
    at Error (native)
    at Object.fs.openSync (fs.js:642:18)
    at Object.fs.readFileSync (fs.js:510:33)
    at Object.readFileSync (/var/app/current/node_modules/aws-sdk/lib/util.js:97:26)
    at Config.loadFromPath (/var/app/current/node_modules/aws-sdk/lib/config.js:409:39)
    at Object.<anonymous> (/var/app/current/server.js:14:12)
    at Module._compile (module.js:577:32)
    at Object.Module._extensions..js (module.js:586:10)
    at Module.load (module.js:494:32)
    at tryModuleLoad (module.js:453:12)
fs.js:642
  return binding.open(pathModule._makeLong(path), stringToFlags(flags), mode);

这是我的server.js中与nodejs错误日志相关的部分：

const express = require("express");
const path = require("path");
const fs = require("fs");
const template = require("./public/template");
const bodyParser = require("body-parser");
const _ = require("lodash");
const uuidv1 = require("uuid/v1");

const AWS = require("aws-sdk");
const multer = require("multer");
const multerS3 = require("multer-s3");

// Image Upload
AWS.config.loadFromPath(path.join(__dirname, "/config/awsconfig.json"));
const s3 = new AWS.S3();
const upload = multer({
  storage: multerS3({
    s3,
    bucket: "hackingdeal",
    key: (req, file, cb) => {
      cb(null, new Date().valueOf() + path.extname(file.originalname));
    },
    acl: "public-read-write"
  })
});

仅供参考，“ server.js”文件位于根目录dir（“ ./ server.js”）中，awsconfig.json位于“ ./config/awsconfig.json”中

我做了一个.gitignore来忽略“ config / awsconfig.json”。 我还创建了一个.ebignore，但是我没有包含“ config / awsconfig.json”，因此我的弹性beantalk可以找到并读取“ config / awsconfig.json”文件。

这是我的nginx / error.log：

2018/10/20 23:32:05 [error] 8103#0: *96 connect() failed (111: Connection refused) while connecting to upstream, client: 110.12.50.169, server: , request: "GET / HTTP/1.1", upstream: "http://127.0.0.1:8081/", host: "hackingdeal-env.4wgwkb9tdv.ap-northeast-2.elasticbeanstalk.com"
2018/10/20 23:32:05 [error] 8103#0: *96 connect() failed (111: Connection refused) while connecting to upstream, client: 110.12.50.169, server: , request: "GET /favicon.ico HTTP/1.1", upstream: "http://127.0.0.1:8081/favicon.ico", host: "hackingdeal-env.4wgwkb9tdv.ap-northeast-2.elasticbeanstalk.com", referrer: "http://hackingdeal-env.4wgwkb9tdv.ap-northeast-2.elasticbeanstalk.com/"
2018/10/20 23:48:00 [error] 12936#0: *1 connect() failed (111: Connection refused) while connecting to upstream, client: 110.12.50.169, server: , request: "GET / HTTP/1.1", upstream: "http://127.0.0.1:8081/", host: "hackingdeal.com"
2018/10/20 23:48:01 [error] 12936#0: *1 connect() failed (111: Connection refused) while connecting to upstream, client: 110.12.50.169, server: , request: "GET /favicon.ico HTTP/1.1", upstream: "http://127.0.0.1:8081/favicon.ico", host: "hackingdeal.com", referrer: "http://hackingdeal.com/"

hackingdeal.com是我的网站。 我通过使用Route53服务将该域连接到我的Elastic Beanstalk，并创建了别名。

问题是，我的应用程序可以在localhost上成功运行。

当我部署带有图像上传语句的“ server.js”后，我的应用程序运行成功（使用AWS S3和multer / multerS3之类的东西：请参见上方代码块）

但是从昨天起，它保持返回502错误的网关。

我完全迷路了，不知道从哪里开始，或者从哪里找到我的问题。 请帮忙..

Answer 1

我必须阅读日志以更好地了解您的问题，但似乎您尝试从此处的文件/config/awsconfig.json加载配置。

// Image Upload
AWS.config.loadFromPath(path.join(__dirname, "/config/awsconfig.json"));
const s3 = new AWS.S3();
const upload = multer({
  storage: multerS3({
    s3,
    bucket: "hackingdeal",
    key: (req, file, cb) => {
      cb(null, new Date().valueOf() + path.extname(file.originalname));
    },
    acl: "public-read-write"
  })
});

因此，您必须将此文件上载到ELB。 实际上，这就是在nodejs.log记录的问题