nginx是一个高性能的web服务器，它也是一个很强的反向代理服务器。我们只要下载源码编译安装配置就可以了。
一、安装Nginx
1、安装所需的PCRE库：
cd /tmp
wget -c ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre/pcre-8.13.tar.gz
tar -zxvf pcre-8.13.tar.gz
cd pcre-8.13
./configure –prefix=/usr
make
make install
2、下载nginx源码安装：
cd /tmp
wget -c http://nginx.org/download/nginx-1.0.8.tar.gz
tar -zxvf nginx-1.0.8.tar.gz
cd nginx-1.0.8
./configure –user=nginx –group=nginx –prefix=/usr/local/nginx –with-http_addition_module –with-http_perl_module –with-http_flv_module –with-http_gzip_static_module –with-http_realip_module –with-http_ssl_module –with-http_stub_status_module –with-http_sub_module –with-http_dav_module
make
make install
3、建立nginx用户：
useradd nginx -s /sbin/nologin -M
4、以下是安装后显示的一些安装路径：
nginx path prefix: “/usr/local/nginx”
nginx binary file: “/usr/local/nginx/sbin/nginx”
nginx configuration prefix: “/usr/local/nginx/conf”
nginx configuration file: “/usr/local/nginx/conf/nginx.conf”
nginx pid file: “/usr/local/nginx/logs/nginx.pid”
nginx error log file: “/usr/local/nginx/logs/error.log”
nginx http access log file: “/usr/local/nginx/logs/access.log”
nginx http client request body temporary files: “client_body_temp”
nginx http proxy temporary files: “proxy_temp”
nginx http fastcgi temporary files: “fastcgi_temp”
nginx http uwsgi temporary files: “uwsgi_temp”
nginx http scgi temporary files: “scgi_temp”
二、配置nginx
1、编辑配置文件/usr/local/nginx/conf/nginx.conf
vim /usr/local/nginx/conf/nginx.conf
2、修改以下内容
将第一行user前的#去掉，改为：
user nginx nginx;
将worker_processes改大，比如设为2：
worker_processes 2;
将以下两行前的#去掉：
error_log logs/error.log
pid logs/nginx.pid
绑定用来代替的域名或IP：
listen 80;
server_name 绑定的域名或IP;
3、配置反向代理内容，并使用HttpSubModule替换URL：
找到
location / {
root html;
index index.html index.htm;
在后加入：
sub_filter 要反向代理的网址 代替的域名或IP; #替换URL
sub_filter_once off; #搜索替换全部行
proxy_pass http://要反向代理的网址;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Accept-Encoding “”; #清除编码
3、编写nginx启动脚本，设置开机自启动：
vim /etc/init.d/nginx
chmod 755 /etc/init.d/nginx
chkconfig –level 345 nginx on
4、测试反向代理
浏览器输入反向代理的域名或IP，查看能够正常打开，URL是否替换。
参考资料：
http://wiki.nginx.org/HttpProxyModule
http://wiki.nginx.org/HttpSubModule
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