Amazon web services nginx（nginx/1.10.0）在ubuntu操作系统升级后不工作

我升级了ubuntu，升级后，example.com（名称更改）停止工作，并给出以下错误。我正在使用nginx（nginx/1.10.0）和ubuntu（16.04版）。整个设置在AWS EC2上

502 Bad Gateway

以下是nginx错误日志的内容

[error] 1201#1201: *27 connect() failed (111: Connection refused) while connecting to upstream, client: 171.76.106.51, server: example.com, request: "GET /favicon.ico HTTP/1.1", upstream: "http://127.0.0.1:3000/favicon.ico", host: "public IP", referrer: "https://publicIP/"

下面是nginx.conf文件

user www-data;
worker_processes 4;
pid /run/nginx.pid;

events {
    worker_connections 768;
    # multi_accept on;
}

http {

    ##
    # Basic Settings
    ##

    sendfile on;
    tcp_nopush on;
    tcp_nodelay on;
    keepalive_timeout 65;
    types_hash_max_size 2048;
    # server_tokens off;

    # server_names_hash_bucket_size 64;
    # server_name_in_redirect off;

    include /etc/nginx/mime.types;
    default_type application/octet-stream;

    ##
    # Logging Settings
    ##

    access_log /var/log/nginx/access.log;
    error_log /var/log/nginx/error.log;

    ##
    # Gzip Settings
    ##

    gzip on;
    gzip_disable "msie6";



    include /etc/nginx/conf.d/*.conf;
    include /etc/nginx/sites-enabled/*;
}

server {
  listen 443 ssl;
  server_name example.com;

  ssl_certificate /etc/letsencrypt/live/example.com/fullchain.pem;
  ssl_certificate_key /etc/letsencrypt/live/example.com/privkey.pem;
  ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
  ssl_prefer_server_ciphers on;
  ssl_ciphers 'EECDH+AESGCM:EDH+AESGCM:AES256+EECDH:AES256+EDH';

  root /usr/share/nginx/html;
  index index.html index.htm;
  # Make site accessible from http://localhost/
  server_name localhost;

  location / {
    proxy_pass http://localhost:3000/;
    proxy_http_version 1.1;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection "upgrade";
    proxy_set_header Host $http_host;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forward-For $proxy_add_x_forwarded_for;
    proxy_set_header X-Forward-Proto http;
    proxy_set_header X-Nginx-Proxy true;
    proxy_redirect off;
  }
}

server {
  listen 80;
  server_name example.com;
  return 301 https://$host$request_uri;
}

nginx站点已启用默认值具有指向可用站点的符号链接默认值，下面是内容

server {
    listen 80 default_server;
    listen [::]:80 default_server ipv6only=on;

    root /usr/share/nginx/html;
    index index.html index.htm;

    # Make site accessible from http://localhost/
    server_name localhost;

    location / {
        try_files $uri $uri/ =404;
    }
}

另一个nginx conf文件

user www-data;
worker_processes 4;
pid /run/nginx.pid;

events {
    worker_connections 768;
    # multi_accept on;
}

http {

    ##
    # Basic Settings
    ##

    sendfile on;
    tcp_nopush on;
    tcp_nodelay on;
    keepalive_timeout 65;
    types_hash_max_size 2048;
    # server_tokens off;

    # server_names_hash_bucket_size 64;
    # server_name_in_redirect off;

    include /etc/nginx/mime.types;
    default_type application/octet-stream;

    ##
    # Logging Settings
    ##

    access_log /var/log/nginx/access.log;
    error_log /var/log/nginx/error.log;

    ##
    # Gzip Settings
    ##

    gzip on;
    gzip_disable "msie6";



    include /etc/nginx/conf.d/*.conf;
    include /etc/nginx/sites-enabled/*;
}

server {
  listen 443 ssl;
  server_name example.com;

  ssl_certificate /etc/letsencrypt/live/example.com/fullchain.pem;
  ssl_certificate_key /etc/letsencrypt/live/example.com/privkey.pem;
  ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
  ssl_prefer_server_ciphers on;
  ssl_ciphers 'EECDH+AESGCM:EDH+AESGCM:AES256+EECDH:AES256+EDH';

  root /usr/share/nginx/html;
  index index.html index.htm;
  # Make site accessible from http://localhost/
  server_name localhost;

  location / {
    proxy_pass http://localhost:3000/;
    proxy_http_version 1.1;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection "upgrade";
    proxy_set_header Host $http_host;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forward-For $proxy_add_x_forwarded_for;
    proxy_set_header X-Forward-Proto http;
    proxy_set_header X-Nginx-Proxy true;
    proxy_redirect off;
  }
}

server {
  listen 80;
  server_name example.com;
  return 301 https://$host$request_uri;
}

当我这样做时，它说连接被拒绝

Resolving localhost (localhost)... 127.0.0.1
Connecting to localhost (localhost)|127.0.0.1|:3000... failed: Connection refused.

当我在做“wget www.google.com”时，它说的是连接

---

你能在这里帮忙吗？

你能分享你的nginx虚拟配置吗？@SahilGulati我已经粘贴了nginx.conf文件，请看一看不，我说的是你的站点enable/default.conf。请分享。@SahilGulati我已经粘贴了网站的内容，现在我的问题是你想执行

HTML

文件还是

php

文件？