varnish实现缓存加速

varnish实现缓存加速

一、采用varnish为nginx实现缓存加速
1、实验环境:
(1)一台varnish缓存服务器,一台nginx服务器
(2)关闭防火墙和selinux
2.配置varnish
(1)修改varnish配置文件:

创建目录:mkdir -pv /data/varnish/cache修改属主:chown varnish.varnish /data/varnish/cache

(2)测试：


二、varnish实现动静分离
(1)varnish配置:

(2)测试:


(3)附件内容设置多个组，并做负载:

示例：    import directors    backend imgsrv1 {        .host = "192.168.10.11";        .port = "80";    }    backend imgsrv2 {        .host = "192.168.10.12";        .port = "80";    }       backend appsrv1 {        .host = "192.168.10.21";        .port = "80";    }    backend appsrv2 {        .host = "192.168.10.22";        .port = "80";    }    sub vcl_init {        new imgsrvs = directors.random();        imgsrvs.add_backend(imgsrv1,10);        imgsrvs.add_backend(imgsrv2,20);        new staticsrvs = directors.round_robin();        appsrvs.add_backend(appsrv1);        appsrvs.add_backend(appsrv2);        new appsrvs = directors.hash();        appsrvs.add_backend(appsrv1,1);        appsrvs.add_backend(appsrv2,1);         }    sub vcl_recv {        if (req.url ~ "(?i)\.(css|js)$" {            set req.backend_hint = staticsrvs.backend();        }               if (req.url ~ "(?i)\.(jpg|jpeg|png|gif)$" {            set req.backend_hint = imgsrvs.backend();        } else {                    set req.backend_hint = appsrvs.backend(req.http.cookie);        }    }

安全检测:

.probe：定义健康状态检测方法；                .url：检测时要请求的URL，默认为"/";                   .request：发出的具体请求；                    .request =                         "GET /.healthtest.html HTTP/1.1"                        "Host: www.ww.com"                        "Connection: close"                .window：基于最近的多少次检查来判断其健康状态；                 .threshold：最近.window中定义的这么次检查中至有.threshhold定义的次数是成功的；成功阈值；                .interval：检测频度；                 .timeout：超时时长；                .expected_response：期望的响应码，默认为200；            健康状态检测的配置方式：                probe PB_NAME  { }                     backend NAME = {                    .probe = PB_NAME;                    ...                     }