Nginx 简单的负载均衡配置示例

　www.s135.com 和 blog.s135.com 域名均指向 Nginx 所在的服务器IP。

　　用户访问http://www.s135.com，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://blog.s135.com，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  www.s135.com  {
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  blog.s135.com  {
server   192.168.1.7:8080;
server   192.168.1.7:8081;
server   192.168.1.7:8082;
}

server
{
listen  80;
server_name  www.s135.com;

location / {
proxy_pass        http://www.s135.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;
}

log_format  www_s135_com  '$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_s135_com;
}

server
{
listen  80;
server_name  blog.s135.com;

location / {
proxy_pass        http://blog.s135.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;
}

log_format  blog_s135_com  '$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  blog_s135_com;
}
}

参考：http://www.neeboo.com/jishuwenzhang/fuwuqi/Linuxfuwuqi/2009/0614/747_5.html

详细配置：http://www.91linux.com/html/article/linux_soft/20090118/15402.html