Varnish特点：安装 配置 简单，支持后端服务器的负载均衡和健康检查，URL地址重写。
官方下载地址：
wget
标准安装：
yum -y install automake autoconf libtool ncurses-devel libxslt groff pcre-devel pkgconfig
cd varnish-2.1.4
./configure --prefix=/usr/local/varnish
make && make install
简单配置文件：cat /usr/local/varnish/etc/varnish/default.vcl
backend default {
.host = "127.0.0.1";
.port = "9999";
}
#定义后端应用端口
sub vcl_recv {
if (req.restarts == 0) {
if (req.http.x-forwarded-for) {
set req.http.X-Forwarded-For =
req.http.X-Forwarded-For ", " client.ip;
} else {
set req.http.X-Forwarded-For = client.ip;
}
}
if (req.url ~ "\.(png|gif|jpg|swf|css|js)$") {
return (lookup);
}
return (pass);
}
#图片、swf等静态文件设置缓存，其他类型文件pass到后端.
sub vcl_pipe {
set bereq.http.connection = "close";
return (pipe);
}
sub vcl_pass {
return (pass);
}
启动Varnish：
/usr/local/varnish/sbin/varnishd -f /usr/local/varnish/etc/varnish/default.vcl -s malloc,128M -T 127.0.0.1:2500 -a 0.0.0.0:80
查看状态：
/usr/local/varnish/bin/varnishstat
查看Referer：
/usr/local/varnish/bin/varnishtop -i rxheader -I Referer
查看访问路径：
/usr/local/varnish/bin/varnishtop -i rxurl