varnish简明教程

剑心通明

操作步骤
cd
useradd -d /dev/null -s /sbin/nologin
varnish
wget
http://nchc.dl.sourceforge.net/sourceforge/varnish/varnish-1.1.1.tar.gz
tar zxvf varnish-1.1.1.tar.gz
cd varnish-1.1.1
./configure --prefix=/usr/local/varnish
make
make install
cd /usr/local/varnish
mkdir var
mkdir logs
mkdir etc
mkdir cache
touch /usr/local/varnish/etc/cache.vcl
touch /usr/local/varnish/stopv
touch /usr/local/varnish/startv
touch /usr/local/varnish/resetv
chmod +x /usr/local/varnish/stopv
chmod +x /usr/local/varnish/startv
chmod +x /usr/local/varnish/resetv
cd ..
chown -R varnish varnish
chgrp -R varnish varnish

逐步说明
增加一个varnish帐户
useradd -d /dev/null -s /sbin/nologin varnish
下载varnish
wget
http://nchc.dl.sourceforge.net/sourceforge/varnish/varnish-1.1.1.tar.gz
解压
tar zxvf varnish-1.1.1.tar.gz
cd varnish-1.1.1
配置
./configure --prefix=/usr/local/varnish
编译
make
安装
make install
设置相关目录
cd /usr/local/varnish
mkdir var
mkdir logs
mkdir etc
mkdir cache
配置文件
touch /usr/local/varnish/etc/cache.vcl
touch /usr/local/varnish/stopv
touch /usr/local/varnish/startv
touch /usr/local/varnish/resetv
chmod +x /usr/local/varnish/stopv
chmod +x /usr/local/varnish/startv
chmod +x /usr/local/varnish/resetv
修改
权限
cd ..
chown -R varnish varnish
chgrp -R varnish varnish
cache.vcl内容
[color="#0000ff"]backend www1 {
    set backend.host = "后端真实的web IP1";
    set backend.port = "http";
}
[color="#0000ff"]backend www2 {
    set backend.host = "后端真实的web IP2";
    set backend.port = "http";
}
[color="#0000ff"]backend www3 {
    set backend.host = "后端真实的web IP2";
    set backend.port = "8080";
}
#可以做多个类似的后端
[color="#0000ff"]acl purge {
                 "localhost";
                 "后端真实的web IP1";
                 "后端真实的web IP2";
         }
        
sub vcl_recv {
   
    if (req.http.host ~ "域名1") {
        set req.backend = www1;
    }
    else
    {
        if(req.http.host ~ "域名2"){
            set req.backend = www2;
        }
        else{
            error 200 "No cahce for this domain";
        }
    }
[color="#0000ff"]    if (req.request == "PURGE") {
        if (!client.ip ~ purge) {
            error 405 "Not allowed.";
        }
        else{
            lookup;
        }
    }
    if (req.request != "GET" && req.request != "HEAD") {
        pipe;
    }
   
    if (req.http.Expect) {
        pipe;
    }
   
    if (req.http.Authenticate ){
        pass;
    }
   
    if (req.http.Cache-Control ~ "no-cache") {
        pass;
    }
    #对ASP或者
PHP
文件不缓存
    if(req.url ~ "\.asp" || req.url ~ "\.php" ){
        pass;
    }
   
    lookup;
}
[color="#0000ff"]sub vcl_pipe {
    pipe;
}
[color="#0000ff"]sub vcl_pass {
    pass;
}
[color="#0000ff"]sub vcl_hash {
    set req.hash += req.url;
    set req.hash += req.http.host;
    #这里看情况，影响缓存命中率
    #set req.hash += req.http.cookie;
    hash;
}
[color="#0000ff"]sub vcl_hit {
    if (req.request == "PURGE") {
         set obj.ttl = 0s;
         error 200 "Purged.";
    }
    if (!obj.cacheable) {
        pass;
    }
    deliver;
}
[color="#0000ff"]sub vcl_miss {
    if (req.request == "PURGE") {
        error 404 "Not in cache.";
    }
    fetch;
}
[color="#0000ff"]sub vcl_fetch {
    if (!obj.valid) {
        error;
    }
    if (!obj.cacheable) {
        pass;
    }
[color="#0000ff"]    if (obj.http.Pragma ~ "no-cache" || obj.http.Cache-Control ~ "no-cache" || obj.http.Cache-Control ~ "private") {
        pass;
    }   
    if (obj.ttl < 180s) {
        set obj.ttl = 180s;
    }
    insert;
}
[color="#0000ff"]sub vcl_deliver {
    deliver;
}
[color="#0000ff"]sub vcl_timeout {
    discard;
}
[color="#0000ff"]sub vcl_discard {
    discard;
}

启动
脚本
/usr/local/varnish/startv内容
[color="#0000ff"]#侦听80端口
/usr/local/varnish/sbin/varnishd -f /usr/local/varnish/etc/cache.vcl \
-a 0.0.0.0:80 \
-s file,/usr/local/varnish/cache,1024M \
-p user=varnish -p group=varnish \
-p default_ttl=14400 -p thread_pool_max=8000 -p send_timeout=20 \
-p backend_http11=on -p client_http11=on \
-p srcaddr_ttl=720 \
-w 4000,12000,10 -T 127.0.0.1:808 \
-P /usr/local/varnish/var/varnish.pid
#日志记录
/usr/local/varnish/bin/varnishncsa -a -w /usr/local/varnish/logs/varnish.log &
停止脚本
/usr/local/varnish/stopvn内容
[color="#0000ff"]killall varnishd
killall varnishncsa
重启脚本（重新读取配置）
[color="#0000ff"]/usr/local/varnish/resetv内容
kill -HUP `cat/usr/local/varnish/var/varnish.pid`
运行/usr/local/varnish/startv启动缓存
日志记录在/usr/local/varnish/logs/varnish.log
启动后可以通过在本机telnet 127.0.0.1 808连接varnish的管理端口，查看运行状态等
补充一下：
varnish日志的rotate
touch /etc/logrotate.d/varnish
/etc/logrotate.d/varnish内容
[color="#0000ff"]/usr/local/varnish/logs/varnish.log {
    daily
    rotate 60
    copytruncate
    notifempty
    missingok
[color="#0000ff"]    prerotate
        killall varnishncsa
    endscript
[color="#0000ff"]    postrotate
        /usr/local/varnish/bin/varnishncsa -a -w /usr/local/varnish/logs/varnish.log &
    endscript
}
               
               
               

本文来自ChinaUnix博客，如果查看原文请点：http://blog.chinaunix.net/u/4206/showart_505522.html