varnish服务器的搭建与应用

varnish   代理软件  反向代理 【web加速服务器】，缓存在内存
varnish 【web加速服务器】，缓存在内存
varnish可以用内存或者硬盘来做缓存

安装Varnish
[root@stu ~]# tar -xf varnish-3.0.6.tar.gz
[root@stu varnish-3.0.6]# cd varnish-3.0.6
[root@stu varnish-3.0.6]# yum -y install readline-devel pcre-devel gcc gcc-c++
[root@stu varnish-3.0.6]# useradd -s /sbin/nologin varnish
[root@stu varnish-3.0.6]# ./configure --prefix=/usr/local/varnish
[root@stu varnish-3.0.6]# make&&make install
[root@stu varnish-3.0.6]# cp redhat/varnish.initrc  /etc/init.d/varnish
[root@stu varnish-3.0.6]# cp redhat/varnish.sysconfig  /etc/sysconfig/varnish
[root@stu varnish-3.0.6]# cp redhat/varnish_reload_vcl  /usr/bin/
[root@stu varnish-3.0.6]# ln -s /usr/local/varnish/sbin/varnishd  /usr/sbin/

varnish配置文件
/etc/sysconfig/varnish    定义前段【软件】
VARNISH_VCL_CONF=/etc/varnish/default.vcl     //定义后端配置文件位置及名称
VARNISH_LISTEN_PORT=80     //监听端口
VARNISH_SECRET_FILE=/etc/varnish/secret   //密钥文件   
VARNISH_STORAGE_FILE=/var/lib/varnish/varnish_storage.bin    //硬盘存储时的位置
VARNISH_STORAGE_SIZE=64M     //缓存大小
#VARNISH_STORAGE="file,${VARNISH_STORAGE_FILE},${VARNISH_STORAGE_SIZE}"
和下面的配置只能用一个
VARNISH_STORAGE="malloc,${VARNISH_STORAGE_SIZE}"
//使用内存缓冲，缓冲大小为64M
VARNISH_TTL=120  //超时时间为120

DAEMON_OPTS="-a ${VARNISH_LISTEN_ADDRESS}:${VARNISH_LISTEN_PORT} \
             -f ${VARNISH_VCL_CONF} \
             -T ${VARNISH_ADMIN_LISTEN_ADDRESS}:${VARNISH_ADMIN_LISTEN_PORT} \
             -t ${VARNISH_TTL} \
             -w ${VARNISH_MIN_THREADS},${VARNISH_MAX_THREADS},${VARNISH_THREAD_TIMEOUT} \
             -u varnish -g varnish \
             -S ${VARNISH_SECRET_FILE} \
             -s ${VARNISH_STORAGE}"


/etc/sysconfig/default.vcl    【定义后端】
[root@stu varnish-3.0.6]# mkdir /etc/varnish
[root@stu varnish-3.0.6]# cp /usr/local/varnish/etc/varnish/default.vcl  /etc/varnish/
[root@stu varnish-3.0.6]# uuidgen > /etc/varnish/secret
[root@stu varnish-3.0.6]# vim /etc/varnish/default.vcl
 backend default {
     .host = "192.168.2.100";
     .port = "80";
 }

[root@stu varnish-3.0.6]# service varnish start

[root@client ~]# curl http://192.168.4.5
123

[root@stu varnish-3.0.6]# ln -s /usr/local/varnish/bin/* /usr/bin/
缓存管理
清除缓存内容的命令格式：
varnishadm -T IP:Port -S securefile
ban.url <regexp>
-- varnishadm -s /etc/varnish/secret ban.url/
查看缓存清理列表：
--varnishadm ban.list

[root@proxy ~]# varnishadm -S /etc/varnish/secret
varnish> storage.list
200        
Storage devices:
    storage.Transient = malloc
    storage.s0 = malloc
varnish> ban.list
200        
Present bans:

varnish> backend.list
200        
Backend name                   Refs   Admin      Probe
default(192.168.2.100,,80)     1      probe      Healthy (no probe)


Varnish日志
varnishlog [-w file]          //共享内存的日志
varnishncsa [-w file]        //类Apache日志