upstream appname_application  {
  ip_hash;
  least_conn;

  server xx.xxx.xxx.xxx:10000 fail_timeout=0;
  server xx.xxx.xxx.xxx:10000 fail_timeout=0;
}

server {

  error_page 403 /403.html;
  error_page 404 /404.html;
  error_page 422 /422.html;
  error_page 503 @503;
  error_page 500 502 504 /500.html;

  # Return a 503 error if the maintenance page exists.
  if (-f /home/apps/appname/shared/public/system/maintenance.html) {
    return 503;
  }

  location @503 {
    # Serve static assets if found.
    if (-f $request_filename) {
      break;
    }

    # Set root to the shared directory.
    root /home/apps/appname/current/public;
    rewrite ^(.*)$ /system/maintenance.html break;
  }

   location / {
    try_files $uri $uri/index.html $uri.html @app;
  }

  location ~ ^/(assets)/ {
    gzip_static on;
    expires max;
    add_header Cache-Control public;
  }

  location @app {
    proxy_pass        http://appname_application;
    proxy_redirect    off;

    proxy_set_header  Host                $http_host;
    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;

    client_max_body_size        100m;
    client_body_buffer_size     128k;

    proxy_buffer_size           4k;
    proxy_buffers               4 32k;
    proxy_busy_buffers_size     64k;
    proxy_temp_file_write_size  64k;
  }
}