varnish安装和配置过程

编译安装varnish：

yum install -y automake autoconf libtool ncurses-devel libxslt groff pcre-devel pkgconfig

wget http://repo.varnish-cache.org/source/varnish-3.0.4.tar.gz tar 

zxvf varnish-3.0.4.tar.gz

cd varnish-3.0.4

./configure --prefix=/usr/local/varnish

make && make install

配置缓存存放+日志地址 

mkdir -p /data/varnish/

chmod +w /data/varnish/

chown -R www:www /data/varnish/  ### 以网站权限运行

编辑配置文件:

[[email protected] ~]# vim /usr/local/varnish/default.vcl
backend web1 {
       .host = "192.168.101.112";
       .port = "80";
       .connect_timeout = 1s;      #连接超时时间
       .first_byte_timeout = 8s;
       .between_bytes_timeout = 5s;
}
#backend web2 {
#       .host = "xx.xx.xx.xx";
#       .port = "80";
#}
acl purge {
       "localhost";
       "127.0.0.1";
       "192.168.101.0"/24;
}
sub vcl_recv {
    if (req.request == "PURGE") {
        if (!client.ip ~ purge)
        {
            error 405 "Not allowed.";
        }
        return(lookup);
    }
    if (req.http.host ~ "^www.server110.com") {               #web1对应的域名
        set req.backend = web1;
    }
    #elseif (req.http.host ~ "^(www)|(my).baidu.com") {        #web2对应的域名
    #   set req.backend = web2;
    #}
    else {
        error 404 "Caesar's cache-server ! Email:[email protected]"; #如果域名不在以上范围的出错提示
        #set req.backend = web1;
    }
    if (req.request != "GET" && req.request != "HEAD") {
        return(pipe);
    }
    elseif (req.url ~ ".(php|cgi)($|?)")                #动态页面直接通过，不缓存
    {
        return(pass);
    }
    return(lookup);
}
sub vcl_hit {
    if (req.request == "PURGE") {
        set obj.ttl = 0s;
        error 200 "Purged.";
    }
}
sub vcl_miss
{
    return (fetch);
}
##让varnish服务器缓存的类型，从后端取得数据后调用
sub vcl_fetch
{
    ##对访问中get有包含jpg,png等格式的文件进行缓存，缓存时间为7天，s为秒
    if (req.request == "GET" && req.url ~ ".(js|css|mp3|jpg|png|gif|swf|jpeg|ico)$")
    { 
        set beresp.ttl = 7d; 
    }
    ##对访问get中包含htm等静态页面，缓存300秒
    if (req.request == "GET" && req.url ~ "/[0-9].htm$")
    { 
        set beresp.ttl = 300s; 
    }
    return (deliver);
}
####添加在页面head头信息中查看缓存命中情况########
sub vcl_deliver
{
    set resp.http.x-hits = obj.hits ;
    if (obj.hits > 0)
    { 
        set resp.http.X-Cache = "HIT cqtel-bbs"; 
    }
    else 
    { 
        set resp.http.X-Cache = "MISS cqtel-bbs"; 
    }
}

参数:

-u 以什么用运行

-g 以什么组运行

-f varnish配置文件

-a 绑定IP和端口

-s varnish缓存文件位置与大小

-w 最小，最大线程和超时时间

-t 缓存时间s

-T varnish管理端口，主要用来清除缓存

-p client_http11=on 支持http1.1协议

-P(大P) /usr/local/varnish/var/varnish.pid 指定其进程码文件的位置，实现管理

停止varnish

pkill varnishd   ###结束varnishd进程

启动 varnish 

/usr/local/varnish/sbin/varnishd -u www -g www -f /usr/local/varnish/default.vcl -a 192.168.101.111:80 -s file,/data/varnish/cache/varnish_cache.data,1G -w 1024,51200,10 -t 3600 -T 192.168.101.111:3000

echo "/usr/local/varnish/sbin/varnishd -u www -g www -f /usr/local/varnish/default.vcl -a 192.168.101.111:80 -s file,/data/varnish/cache/varnish_cache.data,1G -w 1024,51200,10 -t 3600 -T 192.168.101.111:3000" >> /etc/rc.local

/usr/local/varnish/bin/varnishncsa -w /data/varnish/logs/varnish.log & echo "/usr/local/varnish/bin/varnishncsa -w /data/varnish/logs/varnish.log &" >> /etc/rc.local

参数: -w 指定varnish访问日志要写入的目录与文件

varnish日志切割

/usr/local/varnish/bin/varnishadm -T 192.168.101.111:3000 purge "req.http.host ~ www.server110.com$ && req.url ~ /static/image/tp.php"

详细介绍：

192.168.101.111:3000 ###为被清除缓存服务器地址

www.server110.com  ###为被清除的域名

/static/image/tp.php ###为被清除的url地址列表

清除所有缓存

/usr/local/varnish/bin/varnishadm -T 192.168.9.201:3000 url.purge *$

清除image目录下所有缓存

/usr/local/varnish/bin/varnishadm -T 192.168.9.201:3000 url.purge /image/

查看Varnish服务器连接数与命中率

/usr/local/varnish/bin/varnishstat –n /data/varnish/cache/varnish_cache.data