用Varnish搭建Cache服务器

http://iyubo.blogbus.com/logs/30103691.html 前段时间图片服务器的连接数已经接近4W了（Windows服务器），为了减轻图片服务器的压力，尝试着用Varnish安装了一台Cache服务器用于图片的Cache，上线以后使用稳定，表现良好。先写下安装配置文档，还在精进中……欢迎大家互相交流 安装环境 操作系统: CentOS release 5.2 (Final) Kernel: 2.6.18-92.1.6.el5PAE 软件列表 varnish-1.1.2.tar.gz 软件存放位置 /data/software 安装过程 #/usr/sbin/groupadd www -g 48 #/usr/sbin/useradd -u 48 -g www www #mkdir -p /var/vcache #chmod +w /var/vcache #chown -R www:www /var/vcache #mkdir -p /var/log/varnish #chmod +w /var/log/varnish #chown -R www:www /var/log/varnish #cd /data/software #tar zxvf varnish-1.1.2.tar.gz #cd varnish-1.1.2 #./configure --prefix=/usr/local/varnish #make && make install 编辑Varnish配置文件 #vi /usr/local/varnish/vcl.conf backend webserver {        set backend.host = "10.10.10.8";        set backend.port = "80"; } acl purge {        "localhost";        "127.0.0.1";        "10.10.10.0"/24; } sub vcl_recv {         remove req.http.X-Forwarded-For;         set    req.http.X-Forwarded-For = client.ip;         if (req.request == "PURGE") {                if (!client.ip ~ purge) {                        error 405 "Not allowed.";                }                lookup;        }        if (req.http.host ~ "(a|b|c).test.com") {                set req.backend = webserver;               if (req.url ~ "\.(png|gif|jpg|swf|css|js)$") {                        lookup;         }                else {                        pass;                }        }        else {                error 404 "Test Cache Server";                pipe;        } } sub vcl_hash {     set req.hash += req.url;     if (req.http.host) {         set req.hash += req.http.host;     } else {         set req.hash += server.ip;     }     hash; } sub vcl_pipe {         set req.http.connection = "close";         #pipe; } sub vcl_hit {         if (!obj.cacheable) {                 pass;         }        if (req.request == "PURGE") {                set obj.ttl = 0s;                error 200 "Purged.";        }         deliver; } sub vcl_miss {        if (req.request == "PURGE") {                error 404 "Not in cache.";        } } sub vcl_fetch {                set obj.ttl = 180s;                #set    obj.http.X-Varnish-IP = server.ip;                set    obj.http.Varnish = "Tested by Kevin"; } 启动Varnish #/usr/local/varnish/sbin/varnishd -n /var/vcache -f /usr/local/varnish/vcl.conf -a 0.0.0.0:80 -s file,/var/vcache/varnish_cache.data,4G -u apache -w 30000,51200,10 -T 127.0.0.1:3500 -p client_http11=on -p thread_pools=4 启动日志记录 #/usr/local/varnish/bin/varnishncsa -n /var/vcache -w /var/log/varnish/varnish.log & 补充几条相关命令 查看Varnish状态 /usr/local/varnish/bin/varnishstat -n /var/vcache/ 查看访问最多的Referer /usr/local/varnish/bin/varnishtop -n /var/vcache/ -i rxheader -I Referer 查看访问最多的URL /usr/local/varnish/bin/varnishtop -n /var/vcache/ -i rxurl 参考文档 使用Varnish代替Squid做网站缓存加速器的详细解决方案[原创]