Nginx 简单的负载均衡配置

www.cncms.com.cn 和 bbs.cncms.com.cn 域名均指向 Nginx 所在的服务器IP。 

　　用户访问http://www.cncms.com.cn，将其负载均衡到192.168.1.2:80、192.168.1.3:80、192.168.1.4:80、192.168.1.5:80四台服务器。 

　　用户访问http://bbs.cncms.com.cn，将其负载均衡到192.168.1.7服务器的8080、8081、8082端口。 

　　以下为配置文件nginx.conf： 

以下是代码片段：
user    www www;    

worker_processes 10;    

#error_log    logs/error.log;    
#error_log    logs/error.log    notice;    
#error_log    logs/error.log    info;    

#pid                logs/nginx.pid;    

#最大文件描述符    
worker_rlimit_nofile 51200;    

events    
{    
            use epoll;    

            worker_connections 51200;    
}    

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

            keepalive_timeout 120;    

            tcp_nodelay on;    
            if ( $fastcgi_script_name ~ \..*\/.*php )    {
                                                return 403;
                                }

            location ~ .*/(p_w_uploads|customavatars|error|p_w_picpaths|ipdata|mspace|plugins|templates|forumdata|include)/.*\.php$ {
                                                 deny all;
                                }

             location /camera.php
                                {
                                                fastcgi_pass    127.0.0.1:9000;
                                                include fcgi.conf;
                                }

            location ~ .*\.(php|php5)?$
                                {
                                                #fastcgi_pass    127.0.0.1:9000;
                                                fastcgi_pass    cluster;
                                                #root    /mnt/htdocs/www/public;
                                                fastcgi_index index.php;
                                                include fcgi.conf;
                                }


         location / {
                                                index    index.php;
                                                #root    /mnt/htdocs/www/public;
                                                #fastcgi_pass    cluster;
                                                if (!-f $request_filename){
                                                                rewrite ^/(.+)$ /index.php?$1& last;
                                                }
                                }

            location ~ .*\.(gif|jpg|jpeg|png|bmp|swf)$
                                {
                                                 expires            30d;
                                }

            location ~ .*\.(js|css)?$
                                {
                                                expires            1h;
                                }

            upstream    www.cncms.com.cn    {    
                            server     192.168.1.2:80;    
                            server     192.168.1.3:80;    
                            server     192.168.1.4:80;    
                            server     192.168.1.5:80;    
            }    

            upstream    bbs.cncms.com.cn    {    
                            server     192.168.1.7:8080;    
                            server     192.168.1.7:8081;    
                            server     192.168.1.7:8082;    
            }    

            server    
            {    
                            listen    80;    
                            server_name    www.cncms.com.cn;    

                            location / {    
                                             proxy_pass                http://www.cncms.com.cn;    
                                             proxy_set_header     Host                         $host;    
                                             proxy_set_header     X-Real-IP                $remote_addr;    
                                             proxy_set_header     X-Forwarded-For    $proxy_add_x_forwarded_for;    
                            }    

                            log_format    www_cncms_com_cn    ’$remote_addr - $remote_user [$time_local] $request ’    
                                                                ’"$status" $body_bytes_sent "$http_referer" ’    
                                                                ’"$http_user_agent" "$http_x_forwarded_for"’;    
                            access_log    /data1/logs/www.log    www_cncms_com_cn;    
            }    

            server    
            {    
                            listen    80;    
                            server_name    bbs.cncms.com.cn;    

                            location / {    
                                             proxy_pass                http://bbs.cncms.com.cn;    
                                             proxy_set_header     Host                         $host;    
                                             proxy_set_header     X-Real-IP                $remote_addr;    
                                             proxy_set_header     X-Forwarded-For    $proxy_add_x_forwarded_for;    
                            }    

                            log_format    bbs_cncms_com_cn    ’$remote_addr - $remote_user [$time_local] $request ’    
                                                                ’"$status" $body_bytes_sent "$http_referer" ’    
                                                                ’"$http_user_agent" "$http_x_forwarded_for"’;    
                            access_log    /data1/logs/blog.log    bbs_cncms_com_cn;    
            }    
}

附：Nginx 的安装方法可参照《Nginx 0.5.31 + PHP 5.2.4（FastCGI）搭建可承受3万以上并发连接数，胜过apache 10倍的Web服务器》文章的以下段落（仅做负载均衡，无需支持PHP的安装方法）： 

　　二、安装PHP 5.2.4（FastCGI模式） 
　　4、创建www用户和组，以及其使用的目录： 

　　三、安装Nginx 0.5.31 
　　1、安装Nginx所需的pcre库： 
　　2、安装Nginx 
　　3、创建Nginx日志目录 
　　5、启动Nginx