Nginx简单负载均衡配置

Nginx("engine x")是一个高性能的HTTP和反向代理服务器，也是一个IMAP/POP3/SMTP代理服务器。Nginx是由Igor Sysoev为俄罗斯访问量第二的Rambler.ru站点开发的，它已经在该站点运行超过两年半了。Igor将源代码以类BSD许可证的形式发布。

Nginx的中文维基：[url]http://wiki.codemongers.com/NginxChs[/url]

1、安装pcre库
tar jxvf pcre-7.9.tar.bz2
cd pcre-7.9/
./configure
make
make install

2、安装nginx
tar zxvf nginx-0.6.36.tar.gz
cd nginx-0.6.36/
./configure --user=www --group=www --prefix=/usr/local/nginx --with-http_stub_status_module
make
make install

3、运行nginx
/usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/nginx.conf

4、配置nginx反向代理
loading.abc.com和loading.xyz.com域名均指向nginx所在的服务器IP，用户访问[url]http://loading.abc.com[/url]，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[url]http://loading.xyz.com[/url]，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：

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;

      upstream  abc {
              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  xyz {
              server   192.168.1.7:8080;
              server   192.168.1.7:8081;
              server   192.168.1.7:8082;
      }

      server {
              listen  80;
              server_name  loading.abc.com;
              location / {
                       proxy_pass        [url]http://abc[/url];
                       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  abc  '$remote_addr - $remote_user [$time_local] $request '
                                '"$status" $body_bytes_sent "$http_referer" '
                                '"$http_user_agent" "$http_x_forwarded_for"';
              access_log  /www/logs/abc.log  abc;
      }

      server {
              listen  80;
              server_name  loading.xyz.com;
              location / {
                       proxy_pass        [url]http://xyz[/url];
                       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  xyz  '$remote_addr - $remote_user [$time_local] $request '
                                '"$status" $body_bytes_sent "$http_referer" '
                                '"$http_user_agent" "$http_x_forwarded_for"';
              access_log  /www/logs/xyz.log  xyz;
      }
}