稳定版有2.7和3.1供选择 测试版3.2已经加入了SMP支持，可以最大利用处理器资源，3.1之前的所有版本都是不支持SMP和多CPU。
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yum -y install ntp make openssl openssl-devel pcre pcre-devel libpng libpng-devel libjpeg-6b libjpeg-devel-6b freetype freetype-devel gd gd-devel zlib zlib-devel gcc gcc-c++ libXpm libXpm-devel ncurses ncurses-devel libmcrypt libmcrypt-devel libxml2 libxml2-devel imake autoconf automake screen sysstat compat-libstdc++-33 curl curl-devel
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wget http://www.squid-cache.org/Versions/v3/3.2/squid-3.2.0.18.tar.gz
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tar -zvxf squid-3.2.0.18.tar.gz
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cd squid-3.2.0.18
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./configure --prefix=/usr/local/squid --enable-gnuregex --enable-async-io=80 --enable-cache-digests --enable-err-language="zh-cn"--enable-default-err-language="zh-cn" --enable-epoll --disable-internal-dns --with-filedescriptors=20480 --enable-kill-parent-hack
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make
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make install
#创建squid相关目录
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groupadd squid #创建squid squid用户组
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useradd -g squid -s /sbin/nologin #创建squid用户，并加入到squid组里，不允许登录系统
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chown -R squid /usr/local/squid/ #修改squid的安装目录所属用户为squid用户
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mkdir -p /var/cache1 #创建squid的第一个缓存目录
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mkdir -p /var/cache2 #创建squid的第二个缓存目录
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chown squid.squid -R /var/cache1 /var/squid2 #设置目录所有者
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chmod -R 777 /var/cache1 /var/squid #设置目录权限
mv /usr/local/squid/etc/squid.conf /usr/local/squid/etc/squid.conf.bak
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max_filedescriptors 65535
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visible_hostname rui
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acl SSL_ports port 443
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acl Safe_ports port 80
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acl CONNECT method CONNECT
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acl myip src localhost
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#http_access deny OverConnLimit
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#acl web1 src 117.21.227.134
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#acl web2 src .....
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http_access allow manager localhost
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http_access deny !Safe_ports
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http_access deny CONNECT !SSL_ports
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acl OverConnLimit maxconn 300
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http_access deny OverConnLimit
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http_access allow all
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#header_access X-Forwarded-For allow all
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#acl_uses_indirect_client on
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#follow_x_forwarded_for allow all
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allow_underscore on
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half_closed_clients off
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cache_peer 222.174.95.21 parent 9011 0 no-query originserver name=web21
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cache_peer 122.226.213.41 parent 80 0 no-query originserver name=web41
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http_port 80 accel vhost vport
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cache_peer_domain web21 .upbar.net mypig.upbar.net .mypig.net .8goo.com .vitas.com.cn .ibar.cc .360loss.com .99zyz.com
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cache_peer_domain web21 .grow100.com.cn .jpstore.net .jk0769.com .maxmancapsule.com .maxmancapsule.com.cn .maxmancapsules.com.tw .72sun.com .30jf.com .356jf.com .24jf.com .aidashan.com .she36.com
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cache_peer_domain web21 .grow100.net .gao36.com .gao36.net .way200.com .easy900.com .show1000.com .gft400.com .topgouwu.net
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cache_peer_domain web21 .igaofei.com .igaofei.net .mek123.com .mek123.net .yugutoo.com yututoo.com
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cache_peer_domain web41 .bibe.cn .yein.cc .youxia.cn
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cache_peer_access web21 allow all
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cache_peer_access web41 allow all
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forwarded_for on
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acl QUERY urlpath_regex cgi-bin .cgi .php .avi .wmv .rm .ram .mpg .mpeg .zip .exe .asp .aspx
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cache deny QUERY
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reload_into_ims on
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refresh_pattern ^ftp: 1440 20% 10080
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refresh_pattern ^gopher: 1440 0% 1440
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refresh_pattern . 0 20% 4320
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refresh_pattern -i \.html 1440 100% 129600 reload-into-ims
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refresh_pattern -i \.shtml 1440 100% 129600 reload-into-ims
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refresh_pattern -i \.htm 1440 100% 129600 reload-into-ims
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refresh_pattern -i \.gif 1440 100% 129600 ignore-reload
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refresh_pattern -i \.jpg 1440 100% 129600 ignore-reload
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refresh_pattern -i \.png 1440 100% 129600 reload-into-ims
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refresh_pattern -i \.bmp 1440 100% 129600 reload-into-ims
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refresh_pattern -i \.swf 1440 100% 129600 reload-into-ims
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refresh_pattern -i \.flv 129600 100% 129600 ignore-reload
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refresh_pattern -i \.js 1440 100% 129600 reload-into-ims
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refresh_pattern -i \.css 1440 100% 129600 reload-into-ims
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pid_filename /usr/local/squid/var/logs/squid.pid
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#logformat squid %ts.%03tu %6tr %>a %Ss/%03Hs %<st %rm %ru %un %Sh/%<A %mt
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#cache_log /usr/local/squid/var/logs/cache.log
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#access_log /usr/local/squid/var/logs/access.log
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access_log /dev/null
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cache_log /dev/null
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cache_store_log none
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#error_directory none
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cache_mem 256 MB
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memory_pools_limit 312 MB
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maximum_object_size_in_memory 4096 KB
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max_open_disk_fds 0
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minimum_object_size 0 KB
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maximum_object_size 4096 KB
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maximum_object_size_in_memory 4096 KB
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memory_replacement_policy lru
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cache_dir ufs /var/cache1 1024 16 256
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#cache_dir null /tmp
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EOF
| maximum_object_size 是 能cache最大的文件大小。对应wmv，rm文件，建议设置为32768 kB maximum_object_size_in_memory 是在内存中cache的最大文件大小。 cache_mem 是SQUID可用到的最大内存。经实践，4G内存的服务器用2G；超过2G导致SQUID运行不稳 首先要分析SQUID所cache内容： 运行 squidclient -p 80 cache_object://localhost/info 能看到如下内容： Storage Swap size: 7549104 KB Storage Mem size: 418804 KB Mean Object Size: 160.46 KB Mean Object Size是平均内容大小，一般要把maximum_object_size_in_memory设置成离它最近的128的倍数。在这个例子中maximum_object_size_in_memory 的值应该是256kB。 cache_mem 一般设置成服务器内存的一半或更多，只要运行过程中LINUX没有使用SWAP就可以。 再就是按业务分SQUID。 比如某个论坛，用户能上载图片和视频；当然我们要把上载的图片、视频放在单独的域名上，比如img.example.com, video.example.com；这两个域名只提供静态文件服务。 根据统计，图片的平均大小在100KB，视频的平均大小在4M，差别是很大，应该建两个squid分别作图片和视频的CACHE。图片SQUID的 maximum_object_size_in_memory 设置为256KB，视频的SQUID的maximum_object_size_in_memory设置为8196KB。 Squid优化(2) Hot!探讨动态内容的CACHE。 BBS，论坛是典型动态内容，要保证内容更新及时的同时，提高访问速度，降低数据库负担不是个简单任务。经实践发现如下办法取得很好效果： 1) 配置SQUID，对动态内容强制CACHE，用到的配置参数是refresh_pattern refresh_pattern ^/forum/viewthread.php 1440 1000% 1440 ignore-reload /forum/viewthread.php的内容将强制保持1天 2) 修改论坛程序在用户回复帖子后，向SQUID发送PURGE命令清除相应帖子的页面CACHE，保证失效性 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~实现过这一功能,但是有时候生效,有时候无效,还未进一步查明原因.(Edit by Sean) 3) 有些频繁更新的页面可以不CACHE，用no_cache参数 acl no_forum_cache urlpath_regex ^/forum/forumdisplay.php no_cache DENY no_forum_cache |
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/usr/local/squid/sbin/squid
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0 4 * * * /usr/local/squid/sbin/squid -k rotate
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结束squid进程 /squid/sbin/squid –k shutdown
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取得squid运行状态信息：/squid/bin/squidclient -p 80 mgr:info
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取得squid内存使用情况：/squid/bin/squidclient -p 80 mgr:mem
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取得squid已经缓存的列表：/squid/bin/squidclient -p 80 mgrbjects. use it carefully,it may crash
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取得squid的磁盘使用情况：/squid/bin/squidclient -p 80 mgr:diskd
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强制更新某个url：/squid/bin/squidclient -p 80 -m PURGE http://www.rui.com/
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查命中率：
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/soft/squid/bin/squidclient -h111.222.111.111 -p80 mgr:info
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/soft/squid/bin/squidclient -h具体的IP -p80 mgr:info
qingli.sh www.xiuxiukan.com
qingli.sh jpg
qingli.sh xiuxiukan.com 123 bbb jpg
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#!/bin/sh
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squidcache_path="/squidcache"
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squidclient_path="/home/local/squid/bin/squidclient"
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#grep -a -r $1 $squidcache_path/* | grep "http:" | awk -F 'http:' '{print "http:"$2;}' | awk -F\' '{print $1}' > cache.txt
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if [[ "$1" == "swf" || "$1" == "png" || "$1" == "jpg" || "$1" == "ico" || "$1" == "gif" || "$1" == "css" || "$1" == "js" || "$1" == "html" || "$1" == "shtml" || "$1" == "htm" ]]; then
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grep -a -r .$1 $squidcache_path/* | strings | grep "http:" | awk -F 'http:' '{print "http:"$2;}' | awk -F\' '{print $1}' | grep "$1$" | uniq > cache.txt
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else
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grep -a -r $1 $squidcache_path/* | strings | grep "http:" |grep $2$ |grep $3$|grep $4$|grep $5$ |grep $6$| awk -F 'http:' '{print "http:"$2;}' | awk -F\' '{print $1}' | uniq > cache.txt
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fi
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sed -i "s/\";$//g" cache.txt
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cat cache.txt | while read LINE
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do
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$squidclient_path -p 80 -m PURGE $LINE
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done
squid启动文件
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cat >> /etc/init.d/squid <<EOF
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#!/bin/bash
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#chkconfig: 345 85 15
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#description: squid test
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#BY liyaoyi 2012-05-04
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. /etc/rc.d/init.d/functions
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squid="/usr/local/squid/sbin/squid"
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prog="squid"
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RETVAL=0
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start() {
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echo -n $"Starting $prog: "
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daemon $squid -s
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RETVAL=$?
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echo
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return $RETVAL
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}
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stop () {
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echo -n $"Stoping $prog: "
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daemon $squid -k shutdown
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echo
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return $RETVAL
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}
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reload () {
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echo -n $"Reloading $prog: "
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daemon $squid -k reconfigure
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echo
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return $RETVAL
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}
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case "$1" in
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start)
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start
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;;
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stop)
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stop
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;;
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reload)
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reload
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;;
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restart)
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stop
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start
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;;
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*)
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echo $"Usage: $0 {start|stop|restart|reload}"
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RETVAL=1
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esac
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exit $RETVAL
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EOF
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chmod a+x /etc/init.d/squid
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chkconfig --add squid
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chkconfig squid on
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/etc/init.d/squid start
