负载均衡器显示错误 404 页面

Question

我得到了以下配置：

upstream backend {
  server xx.azurewebsites.net;
  server xxx.azurewebsites.net;
}

server {
  listen 80 default_server;
  listen [::]:80 default_server;

  root /var/www/html;

  server_name_;

  location / {
   proxy_pass http://backend;
  }

}

问题是请求总是返回错误 404 页面：https://i.gyazo.com/cb0b81014aac8ea979ad77b246c79377.png

通过浏览器访问 xx.azurewebsites.net 或 xxx.azurewebsites.net 可以，但通过负载均衡器则不行。除了 azurewebsites.net 之外，我还尝试过其他网站，它们也显示 4040 页面。

有人知道我在这里遗漏了什么吗？

nginx.conf：

user Azureuser; // I changed the user from www-user to Azureuser, did't help though
worker_processes auto;
pid /run/nginx.pid;

events {
    worker_connections 768;
}

http {
    sendfile on;
    tcp_nopush on;
    tcp:nodelay on;
    keepalive_timeout 65;
    types_hash_max_size 2448;

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

    gzip on;
    gzip_sidable "msie6";

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

负载均衡器：vm-lb-nginx.northeurope.cloudapp.azure.com

服务器 1：spd1.azurewebsites.net

服务器 2：spd2.azurewebsites.net

Answer 1

Ensure your can visit real server through 80 port.please have a try.
If ok, you should check your dns about the domainName.

upstream webservers {
  server xx.azurewebsites.netIP;
  server xxx.azurewebsites.netIP;
}

server {
    listen       80;
    server_name  localhost;    
    location / {
        index  index.html index.htm;
        proxy_pass   http://webservers; 
        proxy_set_header   X-Real-IP        $remote_addr; 
    }