基于DNS的NGINX负载平衡

我在我的cpanle中使用nginx，我在其中有多个子域，我正在尝试在这些域之间进行负载平衡
这是我的nginx配置

server {
    server_name alparslan.qsinav.com www.alparslan.qsinav.com;
    listen 80;

    set $CPANEL_APACHE_PROXY_IP 213.159.7.72;

    listen 443 ssl;
    ssl_certificate /var/cpanel/ssl/apache_tls/alparslan.qsinav.com/combined;
    ssl_certificate_key /var/cpanel/ssl/apache_tls/alparslan.qsinav.com/combined;

    ssl_protocols TLSv1.2 TLSv1.3;
    ssl_prefer_server_ciphers on;
    ssl_ciphers ALL:!ADH:+HIGH:+MEDIUM:-LOW:-EXP;


    root /home/qsinav/public_html/alparslan/public;
    index index.php index.html;
access_log /var/log/nginx/access.log upstreamlog;
    location = /FPM_50x.html {
try_files $uri $uri/ /index.php$is_args$args;
      #  root   /etc/nginx/ea-nginx/html;
    }

  include conf.d/server-includes/*.conf;
    include conf.d/users/qsinav/*.conf;
    include conf.d/users/qsinav/alparslan.qsinav.com/*.conf;
     location / {
         try_files $uri $uri/ /index.php$is_args$args;
 
proxy_pass http://backend2;
proxy_http_version 1.1;
 proxy_set_header Host $host;
     proxy_set_header X-Forwarded-Host $server_name;
     proxy_set_header X-Real-IP $remote_addr;
     proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
     proxy_set_header X-Forwarded-Proto https;
     proxy_set_header Upgrade $http_upgrade;
     proxy_set_header Connection "upgrade";
    # proxy_set_header HTTPS "on";
 proxy_set_header X-Forwarded-Proto $scheme;
  proxy_headers_hash_max_size 512;
     proxy_headers_hash_bucket_size 128;
 
}

 set $fpm_socket "unix:/opt/cpanel/ea-php74/root/usr/var/run/php-fpm/58ea52f18cb33ca4e5a37e3fd6c39780e15caa8c.sock";


 



    location ~ \.php7?$ {
fastcgi_read_timeout 600s;
proxy_http_version 1.1;
        proxy_set_header Connection "";
proxy_connect_timeout 60s;
        proxy_read_timeout 60s;
        proxy_send_timeout 60s;

   include conf.d/includes-optional/cpanel-fastcgi.conf;
fastcgi_split_path_info ^(.+\.php)(/.+)$;
      fastcgi_pass $fpm_socket;
#        fastcgi_pass unix:/opt/cpanel/ea-php74/root/usr/var/run/php-fpm/58ea52f18cb33ca4e5a37e3fd6c39780e15caa8c.sock;

        error_page 502 503 /FPM_50x.html;
    }

    include conf.d/includes-optional/cpanel-cgi-location.conf;
    include conf.d/includes-optional/cpanel-server-parsed-location.conf;
}

这是我的上游配置

upstream backend2 {
    zone backend 64k;  # Use NGINX Plus' shared memory
    least_conn;

    server demo.qsinav.com weight=1;
    server netcom.qsinav.com weight=4;
}

问题是它重定向到cpanel的IP地址，而不是域，因此服务器无法加载数据这是我的访问日志

alparslan.qsinav.com to : 212.156.7.72:443 [GET /storage/files/mu%C5%9F%20alparslan/loginscreen.jpg HTTP/1.1]upstream_response_time 0.471msec 1605268126.477 request_time 0.472
alparslan.qsinav.com to : 212.156.7.72:443 [GET /storage/files/mu%C5%9F%20alparslan/loginscreen.jpg HTTP/1.1]upstream_response_time 0.472msec 1605268126.477 request_time 0.473
alparslan.qsinav.com to : 212.156.7.72:443 [GET /storage/files/mu%C5%9F%20alparslan/loginscreen.jpg HTTP/1.1]upstream_response_time 0.473msec 1605268126.477 request_time 0.473
alparslan.qsinav.com to :212.156.7.72:443 [GET /storage/files/mu%C5%9F%20alparslan/loginscreen.jpg HTTP/1.1]upstream_response_time 0.474msec 1605268126.477 request_time 0.474
alparslan.qsinav.com to : 212.156.7.72:443 [GET /storage/files/mu%C5%9F%20alparslan/loginscreen.jpg HTTP/1.1]upstream_response_time 0.475msec 1605268126.477 request_time 0.474
 
alparslan.qsinav.com to : 212.156.7.72:443 [GET /storage/files/mu%C5%9F%20alparslan/loginscreen.jpg HTTP/1.1]upstream_response_time 0.479msec 1605268126.478 request_time 0.479
alparslan.qsinav.com to : 212.156.7.72:443[GET /storage/files/mu%C5%9F%20alparslan/loginscreen.jpg HTTP/1.1]upstream_response_time 0.480msec 1605268126.478 request_time 0.479
alparslan.qsinav.com to : 212.156.7.72:443 [GET /storage/files/mu%C5%9F%20alparslan/loginscreen.jpg HTTP/1.1]upstream_response_time 0.480msec 1605268126.478 request_time 0.480
alparslan.qsinav.com to : 212.156.7.72:443 [GET /storage/files/mu%C5%9F%20alparslan/loginscreen.jpg HTTP/1.1]upstream_response_time 0.481msec 1605268126.479 request_time 0.482
alparslan.qsinav.com to : 212.156.7.72:443 [GET /storage/files/mu%C5%9F%20alparslan/loginscreen.jpg HTTP/1.1]upstream_response_time 0.482msec 1605268126.479 request_time 0.482
alparslan.qsinav.com to : 212.156.7.72:443 [GET /storage/files/mu%C5%9F%20alparslan/loginscreen.jpg HTTP/1.1]upstream_response_time 0.482msec 1605268126.479 request_time 0.483
alparslan.qsinav.com to : 212.156.7.72:443 [GET /storage/files/mu%C5%9F%20alparslan/loginscreen.jpg HTTP/1.1]upstream_response_time 0.483msec 1605268126.479 request_time 0.484
alparslan.qsinav.com to : 212.156.7.72:443 [GET /storage/files/mu%C5%9F%20alparslan/loginscreen.jpg HTTP/1.1]upstream_response_time 0.485msec 1605268126.479 request_time 0.484
alparslan.qsinav.com to : 212.156.7.72:443 [GET /storage/files/mu%C5%9F%20alparslan/loginscreen.jpg HTTP/1.1]upstream_response_time 0.485msec 1605268126.479 request_time 0.485
alparslan.qsinav.com to : 213.159.7.72:443 [GET /storage/files/mu%C5%9F%20alparslan/loginscreen.jpg HTTP/1.1]upstream_response_time 0.486msec 1605268126.479 request_time 0.486
alparslan.qsinav.com to : 213.159.7.72:443 [GET /storage/files/mu%C5%9F%20alparslan/loginscreen.jpg HTTP/1.1]upstream_response_time 0.487msec 1605268126.479 request_time 0.486
alparslan.qsinav.com to : 212.156.7.72:443 [GET /storage/files/mu%C5%9F%20alparslan/loginscreen.jpg HTTP/1.1]upstream_response_time 0.487msec 1605268126.480 request_time 0.488
alparslan.qsinav.com to : 212.156.7.72:443 [GET /storage/files/mu%C5%9F%20alparslan/loginscreen.jpg HTTP/1.1]upstream_response_time 0.488msec 1605268126.480 request_time 0.489

正如您从日志中看到的，它正在尝试使用ip地址加载，无法访问文件 那么我该如何解决这个问题呢？如何实现基于dns的负载平衡