Nginx负载均衡入口配置

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以前做的一些网站都是放在Godaddy的虚拟主机下，也不考虑什么性能之类的事情，后来导致占用虚拟主机资源过高，没办法，只能换地方，就买了Burst的VPS，但是用了没多久，发现这个也撑不住，本来想买更高配置的VPS，后来转念一想，不如用几个便宜的搭个负载均衡，所以就索性买了4台VPS

一个入口VPS，两个负载VPS，一个DB,VPS 就这样搭了一个小型的负载均衡。

至于负载的VPS不用设置啥玩意，就是在入口的主机上搭上Nginx并且简单配置一下就好了。

我的代码如下：其中我把域名给换了123.com 和 321.com , 两个负载的IP分别是 184.82.107.126 和 184.82.2.222 ，如果有更多的负载可以在upstream 中继续追加就行了。

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user  nginx;
worker_processes  1;

error_log  /var/log/nginx/error.log warn;
pid        /var/run/nginx.pid;

events {
    worker_connections  521000;
}

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

    server_names_hash_bucket_size 128;
                client_header_buffer_size 32k;
                large_client_header_buffers 4 32k;
                client_max_body_size 50m;

                sendfile on;
                tcp_nopush     on;

                keepalive_timeout 60;
                tcp_nodelay on;
                fastcgi_connect_timeout 300;
                fastcgi_send_timeout 300;
                fastcgi_read_timeout 300;
                fastcgi_buffer_size 64k;
                fastcgi_buffers 4 64k;
                fastcgi_busy_buffers_size 128k;
                fastcgi_temp_file_write_size 256k;

                gzip on;
                gzip_min_length  1k;
                gzip_buffers     4 16k;
                gzip_http_version 1.0;
                gzip_comp_level 2;
                gzip_types       text/plain application/x-javascript text/css application/xml;
                gzip_vary on;
                #limit_zone  crawler  $binary_remote_addr  10m;

      upstream  *.123.com  {
              server   184.82.107.126:80;
              server   184.82.2.222:80;

      }

      upstream  *.321.com  {
              server   184.82.107.126:80;
              server   184.82.2.222:80;

      }
        server
        {
                listen       80;
                server_name *.123.com ;
                location / {
                       proxy_pass         http://*.123.com;
                       proxy_set_header   Host             $host;
                       proxy_set_header   X-Real-IP        $remote_addr;
                       proxy_set_header   X-Forwarded-For  $proxy_add_x_forwarded_for;
              }
}

        server
        {
                listen       80;
                server_name *.321.com ;
                location / {
                       proxy_pass         http://*.321.com;
                       proxy_set_header   Host             $host;
                       proxy_set_header   X-Real-IP        $remote_addr;
                       proxy_set_header   X-Forwarded-For  $proxy_add_x_forwarded_for;
              }
                access_log off;
        }
    #access_log  /var/log/nginx/access.log  main;

    #sendfile        on;
    #tcp_nopush     on;

    #keepalive_timeout  65;

    #gzip  on;

   #include /etc/nginx/conf.d/*.conf;