nginx实现proxy_cache

PURGE模块下载http://labs.frickle.com/files/ngx_cache_purge-1.2.tar.gz

tar zxvf ngx_cache_purge-1.2.tar.gz

在nginx目录下编译

#./configure --add-module=../ngx_cache_purge-1.2 --with-http_realip_module --with-http_gzip_static_module --with-http_stub_status_module --with-http_ssl_module --with-pcre=../pcre-8.10 --with-openssl=../openssl-1.0.0 --with-zlib=../zlib-1.2.5

#make

#make install

安装完成，进入/usr/local/nginx/conf

vi nginx.conf

user  nobody nobody;
worker_processes 4;

error_log  logs/nginx_error.log  crit;
pid        logs/nginx.pid;

#Specifies the value for maximum file descriptors that can be opened by this process.
worker_rlimit_nofile 65535;

events
{
  use epoll;
  worker_connections 65535;
}

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

  #charset  utf-8;
      
  server_names_hash_bucket_size 128;
  client_header_buffer_size 32k;
  large_client_header_buffers 4 32k;
  client_max_body_size 300m;
      
  sendfile on;
  tcp_nopush     on;

  keepalive_timeout 60;

  tcp_nodelay on;

  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;

  gzip on;
  gzip_min_length  1k;
  gzip_buffers     4 16k;
  gzip_http_version 1.1;
  gzip_comp_level 2;
  gzip_types       text/plain application/x-javascript text/css application/xml;
  gzip_vary on;

  #注：proxy_temp_path和proxy_cache_path指定的路径必须在同一分区
  proxy_temp_path   /opt/data/proxy_temp_dir;
  #设置Web缓存区名称为cache_one，内存缓存空间大小为200MB，1天没有被访问的内容自动清除，硬盘缓存空间大小为30GB。
  proxy_cache_path  /opt/data/proxy_cache_dir  levels=1:2   keys_zone=cache_one:200m inactive=1d max_size=5g;
  
  upstream backend_server {
    server   127.0.0.1:8080 weight=1 max_fails=2 fail_timeout=30s;
  }

  server
  {
    listen       80;
    server_name  www.domain.com;
    index index.html index.htm;
    root  /opt/data/www;  

    location /
    {
         #如果后端的服务器返回502、504、执行超时等错误，自动将请求转发到upstream负载均衡池中的另一台服务器，实现故障转移。
         proxy_next_upstream http_502 http_504 error timeout invalid_header;
         proxy_cache cache_one;
         #对不同的HTTP状态码设置不同的缓存时间
         proxy_cache_valid  200 304 12h;
         #以域名、URI、参数组合成Web缓存的Key值，Nginx根据Key值哈希，存储缓存内容到二级缓存目录内
         proxy_cache_key $host$uri$is_args$args;
         proxy_set_header Host  $host;
         proxy_set_header X-Forwarded-For  $remote_addr;
         proxy_pass http://backend_server;
         expires      1d;
    }
    
    #用于清除缓存，假设一个URL为http://192.168.6.5/test.txt，通过访问http://192.168.6.5/purge/test.txt就可以清除该URL的缓存。
    location ~ /purge(/.*)
    {
     #设置只允许指定的IP或IP段才可以清除URL缓存。
     allow            127.0.0.1;
     allow            192.168.6.0/24;
     deny            all;
     proxy_cache_purge    cache_one   $host$1$is_args$args;
    }    

    #扩展名以.jspa .jsp结尾的动态应用程序不缓存.
    location ~ .*\.(jspa|jsp)?$
    {
         proxy_set_header Host  $host;
         proxy_set_header X-Forwarded-For  $remote_addr;
         proxy_pass http://backend_server;
    }

    access_log  off;
  }
}

启动nginx

#/usr/local/nginx/sbin/nginx

如果已经启动，导入配置文件如下

#ps aux | grep nginx

root     22891 0.0 0.0 208976 1832 ?        Ss   11:47   0:00 nginx: master process ./nginx
nobody   23388 0.0 0.3 221520 13344 ?        S    13:47   0:00 nginx: worker process
nobody   23389 0.0 0.3 221880 13868 ?        S    13:47   0:00 nginx: worker process
nobody   23390 0.0 0.3 221520 13344 ?        S    13:47   0:00 nginx: worker process
nobody   23391 0.0 0.3 221520 13344 ?        S    13:47   0:00 nginx: worker process
nobody   23392 0.0 0.0 208976   840 ?        S    13:47   0:00 nginx: cache manager process
root     27404 0.1 0.4 109648 16936 ?        S    15:24   0:00 gedit file:///usr/local/nginx/conf/nginx.conf
root     27414 0.0 0.0   3236   752 pts/1    S+   15:29   0:00 grep nginx

#kill -hup 22891

访问 www.domain.com/index.html

在缓存文件夹会产生一些目录

清楚

www.domain.com/purge/index.html

显示Successful purge

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