Centos 5.6 安装varnish

Centos 5.6 安装varnish

环境

varnish 192.168.58.166

nginx1 192.168.58.130

nginx1 192.168.58.168

 

linux同步北京时间

ntpdate stdtime.sinica.edu.tw

建立运行用户和目录

useradd -s /sbin/nologin varnish

mkdir /data

mkdir /data/varnish

mkdir /data/varnish/cache

mkdir /data/varnish/log

chown -R varnish:varnish /data/varnish/cache/ /data/varnish/log/

安装pcre

yum -y install pcre*

安装varnish

wget http://pkgs.fedoraproject.org/repo/pkgs/varnish/varnish-2.1.2.tar.gz/8b0d80e47acf4946671c381af55518b9/varnish-2.1.2.tar.gz

tar zxvf varnish-2.1.2.tar.gz -C /usr/src/

cd /usr/src/varnish-2.1.2/

export PKG_CONFIG_PATH=/usr/lib/pkgconfig

./configure --prefix=/usr/local/varnish --enable-dependency-tracking --enable-debugging-symbols --enable-developer-warnings

make && make install

新建配置文件

cd /usr/local/varnish/etc

vi vcl.conf

 

backend webserver1 { 

 .host = "192.168.58.130"; 

 .port = "80"; 

} 

backend webserver2 { 

 .host = "192.168.58.168"; 

 .port = "80"; 

} 

#backend webserver3 {

# .host = "192.168.12.14";

# .port = "80";

#}

#backend webserver4 {

# .host = "192.168.12.15";

# .port = "80";

#}

#定义一个名为webserver的director，也就是由webserver1和webserver2两台后端服务器随机分担 

#请求。“.weight”用来指定两台后端服务器的权值。权值高的处理请求的概率就高些 

director webserver random { 

 {.backend = webserver1; .weight = 5;  } 

 {.backend = webserver2; .weight = 8;  } 

} 

#这里设定清理缓存的规则，Varnish容许localhost、127.0.0.1和192.168.58.***三个来源IP经过 

# PURGE方法清除缓存 

acl purge { 

 "localhost"; 

 "127.0.0.1"; 

 "192.168.58.0"/26; 

} 

sub vcl_recv { 

 

#这里设定，当发送PURGE请求的客户端不是在acl中设定的地址时，将返回405状态代码，提示 

#“Not allowed”。当请求的URL是以.php和.cgi结尾时，则交给后端服务器去处理 

 if (req.request == "PURGE") { 

     if (!client.ip ~ purge) { 

     error 405 "Not allowed."; 

   } 

     elseif(req.url ~ "\.(php|cgi)($|\?)") { 

     return (pass); 

   } 

     else { 

     return (lookup); 

   } 

 } 

 

#下面设定域名访问策略，其实也是设定对后端主机健康状态检测的一个机制。若是访问www.ixdba.net 

#或者bbs.ixdba.net，而且请求重启次数为0，则将请求交给webserver来处理。若是请求重启次数 

#为1，则将请求交给webserver1处理。若是访问img.ixdba.net或者p_w_picpaths.ixdba.net，则将 

#请求交给webserver2来处理 

# if((req.http.host ~"^(www.|bbs.)?ixdba.net")&&(req.restarts == 0))  {

#     set req.backend = webserver;

# } elseif(req.restarts == 1) {

#     set req.backend = webserver1;

# }

# if(req.http.host ~"^(img.|p_w_picpaths.)?ixdba.net") {

#     set req.backend = webserver2;

# }

#上面注释部分是基于域名的访问策略，有域名的话，能够采用上面的。由于没有域名，因此下面是去除了域名的部分。

if (req.restarts == 0) {

set req.backend = webserver;

} else if(req.restarts == 1) {

set req.backend = webserver1;

} else if(req.restarts == 2) {

set req.backend = webserver2;

}

 

#下面定义缓存的策略。当请求以.cgi和.php结尾及带有?的URL时，不进行缓存，直接从后端服务器 

#读取内容。其余请求都进入lookup模式，也就是进入cache中经过hash表寻找被请求的数据 

 if (req.request != "GET" && req.request != "HEAD") 

 { 

   return (pipe); 

 } 

 elseif (req.url ~ "\.(cgi|php)($|\?)") 

 { 

  return (pass); 

 } 

 elseif (req.http.Authenticate || req.http.Authorization) { 

   return (pass); 

 } 

 return (lookup); 

} 

 

#若是请求的类型是PURGE方法，Varnishd会将此请求的缓存周期设置为0，也就是使这个URL的缓存失效， 

#从而达到刷新Varnish缓存的目的 

sub vcl_hit 

{ 

 if (req.request == "PURGE") { 

   set obj.ttl = 0s; 

   error 200 "Purged."; 

 } 

 

 if (!obj.cacheable) 

 { 

   return (pass); 

 } 

 

 if (obj.http.Vary) 

 { 

   unset obj.http.Vary; 

 } 

} 

 

sub vcl_miss 

{ 

 if (req.request == "PURGE") { 

   error 404 "Not in cache."; 

 } 

 

} 

#定义hash的值，而且处理压缩内容 

sub vcl_hash { 

 set req.hash += req.url; 

 if (req.http.host) { 

   set req.hash += req.http.host; 

 } else { 

   set req.hash += server.ip; 

 } 

 if ( req.http.Accept-Encoding ){ 

   if (req.url ~ "\.(jpg|jpeg|png|gif|rar|zip|gz|tgz|bz2|tbz|mp3|ogg|swf|exe|flv|avi|rmvb|rm|mpg|mpeg|pdf)$") { 

   } else { 

       set req.hash += req.http.Accept-Encoding; 

   } 

 } 

 return (hash); 

} 

 

sub vcl_fetch 

{ 

    if (!beresp.cacheable) { 

          return (pass); 

    } 

 

    if (beresp.http.Set-Cookie) { 

            return (pass); 

    } 

 

#定义在什么状态下进入restart模式 

    if (beresp.status == 500 || beresp.status == 501 || beresp.status == 502 || beresp.status == 503 || beresp.status == 504 || beresp.status == 404) 

    { 

         return (restart); 

       } 

 

#下面定义不缓存含有哪些HTTP头的请求 

     if (beresp.http.Pragma ~ "no-cache" || beresp.http.Cache-Control ~ "no-cache" || beresp.http.Cache-Control ~ "private") { 

          return (pass); 

 } 

 

#定义不一样内容的缓存时间 

     if (req.request == "GET" && req.url ~ "\.(css|js|html|htm)$") { 

              set beresp.ttl = 300s; 

   } 

  if (req.request == "GET" && req.url ~ "\.(gif|jpg|jpeg|bmp|png|tiff|tif|ico|img|bmp|wmf)$") { 

       set beresp.ttl = 3600s; 

       } 

  if (req.request == "GET" && req.url ~ "\.(svg|swf|ico|mp3|mp4|m4a|wav|rmvb|avi|wmv)$") { 

       set beresp.ttl = 10d; 

       } 

return (deliver); 

 

} 

sub vcl_deliver { 

   if (obj.hits > 0) { 

      set resp.http.X-Cache = "HIT from www.xx.com"; 

   } else { 

     set resp.http.X-Cache = "MISS from www.xx.com"; 

   } 

   return (deliver); 

}

 

启动varnish

/usr/local/varnish/sbin/varnishd -u varnish -g varnish -f /usr/local/varnish/etc/vcl.conf -a 192.168.58.166:80 -s file,/data/varnish/cache/varnish_cache.data,256MB -w 256,2560,10 -t 3600 -T 192.168.58.166:3000

查看端口

[root@ns1 etc]# netstat -napt | grep varnish

tcp        0      0 127.0.0.1:80                0.0.0.0:*                   LISTEN      22907/varnishd

tcp        0      0 127.0.0.1:3000              0.0.0.0:*                   LISTEN      22906/varnishd

在192.168.58.130上面修改网页内容

vi /usr/local/nginx/html/index.html

 

 

<html>

<head>

<title>Welcome to nginx!</title>

</head>

<body bgcolor="white" text="black">

<center><h1>Welcome to nginx1!</h1></center>

</body>

</html>

 

192.168.58.168修改成Welcome to nginx2!

 

重启nginx

/usr/local/nginx/sbin/nginx -s reload

 

 

客户端访问varnish

http://192.168.58.166/

 

关闭nginx1服务

/usr/local/nginx/sbin/nginx -s stop

等待一段时间

清楚缓存，再次访问页面，就看到nginx2