1.nginx安装配置(包含purge模块)
   下载purge模块:
    wget http://labs.frickle.com/files/ngx_cache_purge-2.1.tar.gz
    tar -zxvf ngx_cache_purge-2.1.tar.gz

配置 nginx，在相关地方加上如下的配置就可以了：
    /root/lnmp0.7/upgrade_nginx.sh>增加 
   <code>--add-module=../ngx_cache_purge-2.1</code>
   执行./upgrade_nginx.sh
   输入版本号:1.2.3
 
2.配置 Proxy Cache
  （Purge参照http://labs.frickle.com/nginx_ngx_cache_purge/）
   nginx.conf 的 http部分追加+

                client_body_buffer_size  512k;
                proxy_connect_timeout    5;
                proxy_read_timeout       60;
                proxy_send_timeout       5;
                proxy_buffer_size        16k;
                proxy_buffers            4 64k;
                proxy_busy_buffers_size 128k;
                proxy_temp_file_write_size 128k;
                proxy_temp_path   /home/cache/temp;
                proxy_cache_path   /home/cache/path levels=1:2 keys_zone=cache_one:30m inactive=7d max_size=20g;
(不使用Purge时，追加proxy_cache_path  /home/cache/path levels=1:2 keys_zone=cache_one:30m inactive=7d max_size=20g;)

相关host.conf内部的location / {追加+

  proxy_pass              http://xx.xx.xx.xx/;
  proxy_redirect          off;
  proxy_set_header        Host            $host;
  proxy_set_header        X-Real-IP       $remote_addr;
  proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;

  proxy_cache             cache_one;
  proxy_cache_key         $host$uri$is_args$args;
  proxy_cache_valid       200 304 3d;
  expires 10d;

#  proxy_cache cache_one;
#  proxy_cache_valid  200 304 3d;
#  proxy_cache_key $host$uri$is_args$args;
#  expires 10d;
(注释掉的部分为不使用Purge时的内容)

location ~ /purge(/.*) {
  allow              127.0.0.1;
  deny               all;
  proxy_cache_purge  cache_one $host$1$is_args$args;
}

示例+
user  www www;
worker_processes 2;
error_log  /var/log/nginx_error.log  crit;
worker_rlimit_nofile 65535;
events
{
  use epoll;
  worker_connections 65535;
}

http
{
  include       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 8m;

  sendfile on;
  tcp_nopush     on;
  keepalive_timeout 0;
  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 128k;
  ##cache##
  proxy_connect_timeout 5;
  proxy_read_timeout 60;
  proxy_send_timeout 5;
  proxy_buffer_size 16k;
  proxy_buffers 4 64k;
  proxy_busy_buffers_size 128k;
  proxy_temp_file_write_size 128k;
  proxy_temp_path /home/temp_dir;
  proxy_cache_path /home/cache levels=1:2 keys_zone=cache_one:200m inactive=1d max_size=30g;
  ##end##

  gzip    on;
  gzip_min_length   1k;
  gzip_buffers   4 8k;
  gzip_http_version  1.1;
  gzip_types   text/plain application/x-javascript text/css  application/xml;
  gzip_disable "MSIE [1-6]\.";

  log_format  access  '$remote_addr - $remote_user [$time_local] "$request" '
             '$status $body_bytes_sent "$http_referer" '
             '"$http_user_agent" $http_x_forwarded_for';
  upstream appserver {
        server 192.168.1.251;
  }
  server {
        listen       80 default;
        server_name www.gangpao.com;
        location ~ .*\.(gif|jpg|png|htm|html|css|js|flv|ico|swf)(.*) {
              proxy_pass http://appserver;
              proxy_redirect off;
              proxy_set_header Host $host;
              proxy_cache cache_one;
              proxy_cache_valid 200 302 1h;
              proxy_cache_valid 301 1d;
              proxy_cache_valid any 1m;
              expires 30d;
        }
        location ~ .*\.(php)(.*){
             proxy_pass http://appserver;
             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 /usr/local/nginx/logs/www.gangpao.com.log;
  }
}