#!/bin/bash

# BY kerryhu
# MAIL:king_819@163.com
# BLOG:http://kerry.blog.51cto.com
# Please manual operation yum of before Operation.....
#============================ 更新系统时间 ============================
yum install -y ntp
ntpdate time.nist.gov
echo "00 01 * * * ntpdate time.nist.gov" >> /etc/crontab

#============================ Varnish安装 =============================

如果是RedHat/CentOS系统,在安装varnish的时候首先要安装以下软件包
automake
autoconf
libtool
ncurses-devel
libxslt
groff
pcre-devel
pkgconfig

groupadd www
useradd www -g www -s /sbin/nologin
mkdir -p /data/varnish/{cache,logs}
chmod +w /data/varnish/{cache,logs}
chown -R www:www /data/varnish/{cache,logs}
cd /opt
yum install -y automake autoconf libtool ncurses-devel libxslt groff pcre-devel pkgconfig 
wget 
http://sourceforge.net/projects/varnish/files/varnish/2.1.3/varnish-2.1.3.tar.gz/download
tar -zxvf varnish-2.1.3.tar.gz
cd varnish-2.1.3
./configure --prefix=/usr/local/varnish
make;make install

#============================ varnish配置 ===========================

vi /usr/local/varnish/etc/varnish/kerry.vcl

backend kerry {              #定义后端服务器名
 .host = "192.168.9.203";    #定义后端服务器IP
 .port = "80";      #定义后端服务器端口
}

backend king {
 .host = "192.168.9.204";
 .port = "80";
}

#定义访问控制列表,充许那些IP清除varnish 缓存
acl local {
 "localhost";
 "127.0.0.1";
}

#判断host请求针对那个后端服务器
sub vcl_recv {
 if (req.http.host ~ "^(
www.)?kerry.com$") {  #泛域名的写法"^(.*.)?kerry.com$"
  set req.backend = kerry;
 }
 elsif (req.http.host ~ "^(
www.)?king.com$") {
  set req.backend = king;
 }
 else {
  error 404 "Unknown HostName!"; #如果都不匹配,返回404错误
 } 
 #不充许非访问控制列表的IP进行varnish缓存清除
 if(req.request == "PURGE") {
  if (!client.ip ~ local) {
   error 405 "Not Allowed.";
   return (lookup);
   }
 }
 #清除url中有jpg|png|gif等文件的cookie
 if (req.request == "GET" && req.url ~ "\.(jpg|png|gif|swf|jpeg|ico)$") {
  unset req.http.cookie;
 }
 #取消服务器上p_w_picpaths目录下所有文件的cookie
 if (req.url ~ "^/p_w_picpaths") {
  unset req.http.cookie;
 }
 #判断req.http.X-Forwarded-For,如果前端有多重反向代理,这样可以获取客户端IP地址。
 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.request != "GET" &&
     req.request != "HEAD" &&
     req.request != "PUT" &&
     req.request != "POST" &&
     req.request != "TRACE" &&
     req.request != "OPTIONS" &&
     req.request != "DELETE") {
  return (pipe);
 }
 #针对请求和url地址判断,是否在varnish缓存里查找
 if (req.request != "GET" && req.request != "HEAD") {
  return (pass);
 } ## 对非GET|HEAD请求的直接转发给后端服务器
 if (req.http.Authorization || req.http.Cookie) {
  return (pass);
 }
 if (req.request == "GET" && req.url ~ "\.(php)($|\?)") {
  return (pass);
  } #对GET请求,且url里以.php和.php?结尾的,直接转发给后端服务器
      return (lookup);
 }  #除了以上的访问以外,都在varnish缓存里查找

sub vcl_pipe {
 return (pipe);
}

sub vcl_pass {
 return (pass);
}

sub vcl_hash {
 set req.hash += req.url;
 if (req.http.host) {
  set req.hash += req.http.host;
 } else {
  set req.hash += server.ip;
 }
 return (hash);
}

sub vcl_hit {
 if (!obj.cacheable) {
  return (pass);
 }
 if (req.request == "PURGE") {
         set obj.ttl = 0s;
         error 200 "Purged.";
      }
 return (deliver);
}

sub vcl_miss {
 return (fetch);
}

sub vcl_fetch {
 if (!beresp.cacheable) {
  return (pass);
 }
 if (beresp.http.Set-Cookie) {
  return (pass);
 }
 #WEB服务器指明不缓存的内容,varnish服务器不缓存
 if (beresp.http.Pragma ~ "no-cache" ||
     beresp.http.Cache-Control ~ "no-cache" ||
            beresp.http.Cache-Control ~ "private") {
  return (pass);
      }
      #对.txt .js .shtml结尾的URL缓存时间设置1小时,对其他的URL缓存时间设置为10天
 if (req.request == "GET" && req.url ~ "\.(txt|js|css|shtml|html|htm)$") {
               set beresp.ttl = 3600s;
 }
 else {
               set beresp.ttl = 10d;
 }
 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";
 }
}

sub vcl_error {
 set obj.http.Content-Type = "text/html; charset=utf-8";
 synthetic {"
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "
http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html>
   <head>
      <title>"} obj.status " " obj.response {"</title>
   </head>
   <body>
      <h1>Error "} obj.status " " obj.response {"</h1>
      <p>"} obj.response {"</p>
      <h3>Guru Meditation:</h3>
      <p>XID: "} req.xid {"</p>
      <hr>
      <address>
         <a href="
http://www.bbs.com/">bbs cache server</a>
      </address>
   </body>
</html>
"};
 return (deliver);
}


注意:在2.1后的版本里,原"obj.*"的变量全部变为"beresp.*"了,需要留意一下

启动varnish
/usr/local/varnish/sbin/varnishd -u www -g www -f /usr/local/varnish/etc/varnish/kerry.vcl -a 192.168.9.201:80 -s file,/data/varnish/cache/varnish_cache.data,1G -w 1024,51200,10 -t 3600 -T 192.168.9.201:3000
echo "/usr/local/varnish/sbin/varnishd -u www -g www -f /usr/local/varnish/etc/varnish/kerry.vcl -a 192.168.9.201:80 -s file,/data/varnish/cache/varnish_cache.data,1G -w 1024,51200,10 -t 3600 -T 192.168.9.201:3000" >> /etc/rc.local
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 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

启动日志,方便分析网站访问情况
/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
vi /root/cut_varnish_log.sh

#!/bin/sh
logs_path=/data/varnish/logs
vlog=${logs_path}/varnish.log
date=$(date -d "yesterday" +"%Y-%m-%d")
pkill -9 varnishncsa
mkdir -p ${logs_path}/$(date -d "yesterday" +"%Y")/$(date -d "yesterday" +"%m")/
mv /data/varnish/logs/varnish.log ${logs_path}/$(date -d "yesterday" +"%Y")/$(date -d "yesterday" +"%m")/varnish-${date}.log
/usr/local/varnish/bin/varnishncsa -w /data/varnish/logs/varnish.log &

使用计划任务,每天晚上凌晨00点运行日志切割脚本
echo "0 0 * * * /root/cut_varnish_log.sh" >> /etc/crontab

cat /etc/rc.local
ulimit -SHn 51200
/usr/local/varnish/sbin/varnishd -u www -g www -f /usr/local/varnish/etc/varnish/kerry.vcl -a 192.168.9.201:80 -s file,/data/varnish/cache/varnish_cache.data,1G -w 1024,51200,10 -t 3600 -T 192.168.9.201:3000
/usr/local/varnish/bin/varnishncsa -w /data/varnish/logs/varnish.log &

#============================ Varnish 缓存清除 ======================
/usr/local/varnish/bin/varnishadm -T 192.168.9.201:3000 purge "req.http.host ~ 
www.kerry.com$ && req.url ~ /static/p_w_picpath/tp.php"
说明: 
192.168.9.201:3000 为被清除缓存服务器地址 
www.kerry.com 为被清除的域名 
/static/p_w_picpath/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p_w_picpath目录下所有缓存 
/usr/local/varnish/bin/varnishadm -T 192.168.9.201:3000 url.purge /p_w_picpath/

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

#============================ 内核优化 ==============================
vi /etc/sysctl.conf
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_tw_recycle = 1
#net.ipv4.tcp_fin_timeout = 30
#net.ipv4.tcp_keepalive_time = 300
net.ipv4.ip_local_port_range = 1024 65000
net.ipv4.tcp_max_syn_backlog = 8192
net.ipv4.tcp_max_tw_buckets = 5000

net.ipv4.tcp_max_syn_backlog = 65536
net.core.netdev_max_backlog =  32768
net.core.somaxconn = 32768

net.core.wmem_default = 8388608
net.core.rmem_default = 8388608
net.core.rmem_max = 16777216
net.core.wmem_max = 16777216

net.ipv4.tcp_timestamps = 0
net.ipv4.tcp_synack_retries = 2
net.ipv4.tcp_syn_retries = 2

net.ipv4.tcp_tw_recycle = 1
#net.ipv4.tcp_tw_len = 1
net.ipv4.tcp_tw_reuse = 1

net.ipv4.tcp_mem = 94500000 915000000 927000000
net.ipv4.tcp_max_orphans = 3276800

/sbin/sysctl -p

#===================== Varnish添加到服务自启动 ======================
配置启动文件
vi /etc/init.d/varnish
#! /bin/sh
#
# varnish Control the varnish HTTP accelerator
#
# chkconfig: - 90 10
# description: Varnish is a high-perfomance HTTP accelerator
# processname: varnishd
# config: /etc/sysconfig/varnish
# pidfile: /var/run/varnish/varnishd.pid

### BEGIN INIT INFO
# Provides: varnish
# Required-Start: $network $local_fs $remote_fs
# Required-Stop: $network $local_fs $remote_fs
# Should-Start: $syslog
# Short-Description: start and stop varnishd
# Description: Varnish is a high-perfomance HTTP accelerator
### END INIT INFO

# Source function library.
. /etc/init.d/functions

retval=0
pidfile=/var/run/varnish.pid

exec="/usr/local/varnish/sbin/varnishd"
prog="varnishd"
config="/usr/local/varnish/etc/varnish/varnish"
lockfile="/var/lock/subsys/varnish"

# Include varnish defaults
[ -e /usr/local/varnish/etc/varnish/varnish ] && . /usr/local/varnish/etc/varnish/varnish


start() {

    if [ ! -x $exec ]
    then
        echo $exec not found
        exit 5
    fi

    if [ ! -f $config ]
    then
        echo $config not found
        exit 6
    fi
    echo -n "Starting varnish HTTP accelerator: "

    # Open files (usually 1024, which is way too small for varnish)
    ulimit -n ${NFILES:-131072}

    # Varnish wants to lock shared memory log in memory. 
    ulimit -l ${MEMLOCK:-82000}

        # $DAEMON_OPTS is set in /etc/sysconfig/varnish. At least, one
        # has to set up a backend, or /tmp will be used, which is a bad idea.
    if [ "$DAEMON_OPTS" = "" ]; then
        echo "\$DAEMON_OPTS empty."
        echo -n "Please put configuration options in $config"
        return 6
    else
        # Varnish always gives output on STDOUT
        daemon   $exec -P $pidfile "$DAEMON_OPTS" > /dev/null 2>&1
        retval=$?
        if [ $retval -eq 0 ]
        then
            touch $lockfile
            echo_success
            echo
        else
            echo_failure
        fi
        return $retval
    fi
}

stop() {
    echo -n "Stopping varnish HTTP accelerator: "
    killproc $prog
    retval=$?
    echo
    [ $retval -eq 0 ] && rm -f $lockfile
    return $retval
}

restart() {
    stop
    start
}

reload() {
    restart
}

force_reload() {
    restart
}

rh_status() {
    status $prog
}

rh_status_q() {
    rh_status >/dev/null 2>&1
}

# See how we were called.
case "$1" in
    start)
        rh_status_q && exit 0
        $1
        ;;
    stop)
        rh_status_q || exit 0
        $1
        ;;
    restart)
        $1
        ;;
    reload)
        rh_status_q || exit 7
        $1
        ;;
    force-reload)
        force_reload
        ;;
    status)
        rh_status
        ;;
    condrestart|try-restart)
        rh_status_q || exit 0
        restart
        ;;
    *)
    echo "Usage: $0 {start|stop|status|restart|condrestart|try-restart|reload|force-reload}"

    exit 2
esac

exit $?

varnish的配置调用文件,是用来告诉程序从哪里读取配置文件,启动参数有哪些等

vi /usr/local/varnish/etc/varnish
# Configuration file for varnish
#
# /etc/init.d/varnish expects the variable $DAEMON_OPTS to be set from this
# shell script fragment.
#

# Maximum number of open files (for ulimit -n)
NFILES=131072

# Locked shared memory (for ulimit -l)
# Default log size is 82MB + header
MEMLOCK=1000000

## Alternative 2, Configuration with VCL
DAEMON_OPTS="-a 192.168.9.201:80 \
             -f /usr/local/varnish/etc/varnish/kerry.vcl \
             -T 192.168.9.201:3000 \
             -u www -g www \
             -n /data/varnish/cache \
             -s file,/data/varnish/cache/varnish_cache.data,1G"

添加到系统服务,开机自启动
chmod +x /etc/init.d/varnish 
/sbin/chkconfig --add varnish
/sbin/chkconfig --level 2345 varnish on

开启varnish
/etc/init.d/varnish start

关闭varnish
/etc/init.d/varnish stop

本文出自 “聆听未来” 博客,请务必保留此出处http://kerry.blog.51cto.com/172631/402923