Varnish Cache(反向网站快取服务器)

Varnish cache是一款功能强大专业的高性能反向代理服务器和HTTP加速器的工具,帮助朋友轻松的进行http相关的加速服务器的建立,有需要这款反向代理服务器的朋友就来IT猫扑下载吧!

Varnish Cache功能特色

初步流支持，无论是在错过和通行证

压缩和解压缩的支持，包括缝合在一起

压缩ESI片段

插件（vmods）

改进的文件

参数的默认值

Varnishncsa现在有自定义日志格式的支持

Varnishlog，varnishncsa和varnishhist现在可以过滤掉的记录

匹配多个表达式。

Varnish的结构特点

Varnish把数据存放在服务器的内存中，这种模式的效率是最高的，不过重启后数据会消失，官方透露3.0版本可以解决这个问题。Varnish可以设置0～60秒的精确缓存时间，不过32位的机器支持的缓存文件最大为2 GB。Varnish采用VCL的配置，而且具有强大的管理功能，如top、stat、admin、lis，所以管理方式比较灵活。Varnish的状态机设计不仅巧妙，结构也很清晰，利用二叉堆管理缓存文件，即可达到随时删除的目的。

与传统的Squid 相比，Varnish具有性能更高、速度更快、管理更加方便等诸多优点：

Varnish采用了“Visual Page Cache”技术，所有缓存的数据都直接从内存读取，而Squid从硬盘读取缓存的数据，它避免了Squid频繁在内存、磁盘中交换文件，性能要比Squid高。

Varnish稳定性比Squid高，宕机率很低。

通过Varnish管理端口，可以使用正则表达式快速、批量地清除部分缓存，这一点是Squid不能具备的。

Varnish Cache使用方法

如果您是 RedHat/centos 系统想安装 varnish，您需要安装以下软件包：

automake

autoconf

libtool

ncurses-devel

libxslt

groff

pcre-devel

pkgconfig

Varnish可以支持更多的并发连接。因为Varnish的TCP连接与释放比Squid快，所以在高并发连接情况下可以支持更多的TCP连接。

以下是在配置好 yum 包管理器的情况下运行

yum install -y automake autoconf libtool ncurses-devel libxslt groff pcre-devel pkgconfig

[root@node18 ~]# yum install -y automake autoconf libtool ncurses-devel libxslt groff pcre-devel pkgconfig

Loaded plugins: fastestmirror

Loading mirror speeds from cached hostfile

* base: mirrors.grandcloud.cn

* extras: mirrors.grandcloud.cn

* updates: mirrors.grandcloud.cn

Setting up Install Process

Package automake-1.9.6-2.3.el5.noarch already installed and latest version

Package autoconf-2.59-12.noarch already installed and latest version

Package libtool-1.5.22-7.el5_4.i386 already installed and latest version

Package ncurses-devel-5.5-24.20060715.i386 already installed and latest version

Package libxslt-1.1.17-4.el5_8.3.i386 already installed and latest version

Package groff-1.18.1.1-13.el5.i386 already installed and latest version

Package pcre-devel-6.6-6.el5_6.1.i386 already installed and latest version

Package 1:pkgconfig-0.21-2.el5.i386 already installed and latest version

Nothing to do

[root@node18 ~]#

下载varnish源代码并编译安装

mkdir varnish_setup

cd varnish_setup/

wget http://repo.varnish-cache.org/source/varnish-2.1.5.tar.gz

tar zxf varnish-2.1.5.tar.gz

cd varnish-2.1.5

./autogen.sh

./configure --prefix=/usr

make

cd bin/varnishtest && ./varnishtest tests/*.vtc   # <== 这一步执行测试，很费时，可省略

cd ../..     # <=== 如果执行了测试，否则执行安装

make install

注意：本文的安装与默认安装不同

varnishd将被安装到 /usr/sbin/varnishd

配置文件 /usr/etc/varnish/default.vcl

下面是安装的详细记录：

[root@node18 ~]# mkdir varnish_setup

[root@node18 ~]# cd varnish_setup/

[root@node18 varnish_setup]# wget http://repo.varnish-cache.org/source/varnish-2.1.5.tar.gz

--2012-11-20 10:23:32--  http://repo.varnish-cache.org/source/varnish-2.1.5.tar.gz

正在解析主机 repo.varnish-cache.org... 194.31.39.155

Connecting to repo.varnish-cache.org|194.31.39.155|:80... 已连接。

已发出 HTTP 请求，正在等待回应... 200 OK

长度：1530856 (1.5M) [application/x-gzip]

Saving to: `varnish-2.1.5.tar.gz'

100%[======================================>] 1,530,856   51.2K/s   in 20s

2012-11-20 10:23:53 (73.2 KB/s) - `varnish-2.1.5.tar.gz' saved [1530856/1530856]

[root@node18 varnish_setup]#

[root@node18 varnish_setup]# tar zxf varnish-2.1.5.tar.gz

[root@node18 varnish_setup]# cd varnish-2.1.5

[root@node18 varnish-2.1.5]# ls

aclocal.m4  config.guess  depcomp  install-sh   Makefile.in  varnishapi.pc.in

autogen.sh  config.h.in   doc      lib          man

bin         config.sub    etc      LICENSE      missing

ChangeLog   configure     include  ltmain.sh    README

compile     configure.ac  INSTALL  Makefile.am  redhat

[root@node18 varnish-2.1.5]#

[root@node18 varnish-2.1.5]# ./autogen.sh

+ aclocal

+ libtoolize --copy --force

+ autoheader

+ automake --add-missing --copy --foreign

+ autoconf

[root@node18 varnish-2.1.5]# ./configure --prefix=/usr

checking build system type... i686-redhat-linux-gnu

checking host system type... i686-redhat-linux-gnu

checking target system type... i686-redhat-linux-gnu

checking for a BSD-compatible install... /usr/bin/install -c

checking whether build environment is sane... yes

checking for gawk... gawk

checking whether make sets $(MAKE)... yes

checking for gcc... gcc

checking for C compiler default output file name... a.out

checking whether the C compiler works... yes

...

configure: creating ./config.status

config.status: creating Makefile

config.status: creating bin/Makefile

config.status: creating bin/varnishadm/Makefile

config.status: creating bin/varnishd/Makefile

config.status: creating bin/varnishlog/Makefile

config.status: creating bin/varnishhist/Makefile

config.status: creating bin/varnishncsa/Makefile

config.status: creating bin/varnishreplay/Makefile

config.status: creating bin/varnishstat/Makefile

config.status: creating bin/varnishsizes/Makefile

config.status: creating bin/varnishtest/Makefile

config.status: creating bin/varnishtop/Makefile

config.status: creating doc/Makefile

config.status: creating doc/sphinx/Makefile

config.status: creating etc/Makefile

config.status: creating include/Makefile

config.status: creating lib/Makefile

config.status: creating lib/libvarnish/Makefile

config.status: creating lib/libvarnishapi/Makefile

config.status: creating lib/libvarnishcompat/Makefile

config.status: creating lib/libvcl/Makefile

config.status: creating lib/libjemalloc/Makefile

config.status: creating man/Makefile

config.status: creating redhat/Makefile

config.status: creating varnishapi.pc

config.status: creating config.h

config.status: executing depfiles commands

[root@node18 varnish-2.1.5]# make

make  all-recursive

make[1]: Entering directory `/root/varnish_setup/varnish-2.1.5'

Making all in include

make[2]: Entering directory `/root/varnish_setup/varnish-2.1.5/include'

make[2]: Nothing to be done for `all'.

make[2]: Leaving directory `/root/varnish_setup/varnish-2.1.5/include'

Making all in lib

make[2]: Entering directory `/root/varnish_setup/varnish-2.1.5/lib'

Making all in libvarnishcompat

make[3]: Entering directory `/root/varnish_setup/varnish-2.1.5/lib/libvarnishcompat'

if /bin/sh ../../libtool --tag=CC --mode=compile gcc -DHAVE_CONFIG_H -I. -I. -I../.. -I../../include    -g -O2 -MT daemon.lo -MD -MP -MF &.deps/daemon.Tpo& -c -o daemon.lo daemon.c;

then mv -f &.deps/daemon.Tpo& &.deps/daemon.Plo&; else rm -f &.deps/daemon.Tpo&; exit 1; fi

mkdir .libs

gcc -DHAVE_CONFIG_H -I. -I. -I../.. -I../../include -g -O2 -MT daemon.lo -MD -MP -MF .deps/daemon.Tpo -c daemon.c  -fPIC -DPIC -o .libs/daemon.o

...

mkdir .libs

gcc -g -O2 -o .libs/varnishsizes varnishsizes.o  ../../lib/libvarnish/.libs/libvarnish.so -lrt -lnsl ../../lib/libvarnishcompat/.libs/libvarnishcompat.so ../../lib/libvarnishapi/.libs/libvarnishapi.so -lpcre -lm -lcurses -lpthread

creating varnishsizes

make[3]: Leaving directory `/root/varnish_setup/varnish-2.1.5/bin/varnishsizes'

make[3]: Entering directory `/root/varnish_setup/varnish-2.1.5/bin'

make[3]: Nothing to be done for `all-am'.

make[3]: Leaving directory `/root/varnish_setup/varnish-2.1.5/bin'

make[2]: Leaving directory `/root/varnish_setup/varnish-2.1.5/bin'

Making all in man

make[2]: Entering directory `/root/varnish_setup/varnish-2.1.5/man'

make[2]: Nothing to be done for `all'.

make[2]: Leaving directory `/root/varnish_setup/varnish-2.1.5/man'

Making all in etc

make[2]: Entering directory `/root/varnish_setup/varnish-2.1.5/etc'

make[2]: Nothing to be done for `all'.

make[2]: Leaving directory `/root/varnish_setup/varnish-2.1.5/etc'

Making all in doc

make[2]: Entering directory `/root/varnish_setup/varnish-2.1.5/doc'

Making all in sphinx

make[3]: Entering directory `/root/varnish_setup/varnish-2.1.5/doc/sphinx'

make[3]: Nothing to be done for `all'.

make[3]: Leaving directory `/root/varnish_setup/varnish-2.1.5/doc/sphinx'

make[3]: Entering directory `/root/varnish_setup/varnish-2.1.5/doc'

make[3]: Nothing to be done for `all-am'.

make[3]: Leaving directory `/root/varnish_setup/varnish-2.1.5/doc'

make[2]: Leaving directory `/root/varnish_setup/varnish-2.1.5/doc'

Making all in redhat

make[2]: Entering directory `/root/varnish_setup/varnish-2.1.5/redhat'

make[2]: Nothing to be done for `all'.

make[2]: Leaving directory `/root/varnish_setup/varnish-2.1.5/redhat'

make[2]: Entering directory `/root/varnish_setup/varnish-2.1.5'

make[2]: Nothing to be done for `all-am'.

make[2]: Leaving directory `/root/varnish_setup/varnish-2.1.5'

make[1]: Leaving directory `/root/varnish_setup/varnish-2.1.5'

[root@node18 varnish-2.1.5]#

[root@node18 varnish-2.1.5]# cd bin/varnishtest && ./varnishtest tests/*.vtc

#    top  TEST tests/a00000.vtc passed (0.001s)

#    top  TEST tests/a00001.vtc passed (0.001s)

#    top  TEST tests/a00002.vtc passed (0.001s)

#    top  TEST tests/a00003.vtc passed (0.001s)

#    top  TEST tests/a00004.vtc passed (0.001s)

#    top  TEST tests/a00005.vtc passed (0.001s)

#    top  TEST tests/a00006.vtc passed (0.001s)

#    top  TEST tests/a00007.vtc passed (0.001s)

#    top  TEST tests/a00008.vtc passed (1.806s)

#    top  TEST tests/a00009.vtc passed (0.256s)

#    top  TEST tests/a00010.vtc passed (0.002s)

#    top  TEST tests/b00000.vtc passed (0.757s)

#    top  TEST tests/b00001.vtc passed (0.675s)

#    top  TEST tests/b00002.vtc passed (0.683s)

...

#    top  TEST tests/v00023.vtc passed (0.575s)

#    top  TEST tests/v00024.vtc passed (0.587s)

#    top  TEST tests/v00025.vtc passed (0.673s)

#    top  TEST tests/v00026.vtc passed (0.590s)

#    top  TEST tests/v00028.vtc passed (0.581s)

#    top  TEST tests/v00029.vtc passed (1.310s)

#    top  TEST tests/v00030.vtc passed (0.585s)

#    top  Slowest test: tests/p00005.vtc 8.022s

#    top  Total tests run:   196

#    top  Total duration: 204.346s

[root@node18 varnishtest]#

[root@node18 varnishtest]# cd ../..

[root@node18 varnish-2.1.5]# make install

Making install in include

make[1]: Entering directory `/root/varnish_setup/varnish-2.1.5/include'

make[2]: Entering directory `/root/varnish_setup/varnish-2.1.5/include'

make[2]: Nothing to be done for `install-exec-am'.

test -z &/usr/include/varnish& || mkdir -p -- &/usr/include/varnish&

/usr/bin/install -c -m 644 'shmlog.h' '/usr/include/varnish/shmlog.h'

/usr/bin/install -c -m 644 'shmlog_tags.h' '/usr/include/varnish/shmlog_tags.h'

/usr/bin/install -c -m 644 'stat_field.h' '/usr/include/varnish/stat_field.h'

/usr/bin/install -c -m 644 'stats.h' '/usr/include/varnish/stats.h'

/usr/bin/install -c -m 644 'varnishapi.h' '/usr/include/varnish/varnishapi.h'

make[2]: Leaving directory `/root/varnish_setup/varnish-2.1.5/include'

make[1]: Leaving directory `/root/varnish_setup/varnish-2.1.5/include'

Making install in lib

...

Making install in redhat

make[1]: Entering directory `/root/varnish_setup/varnish-2.1.5/redhat'

make[2]: Entering directory `/root/varnish_setup/varnish-2.1.5/redhat'

make[2]: Nothing to be done for `install-exec-am'.

make[2]: Nothing to be done for `install-data-am'.

make[2]: Leaving directory `/root/varnish_setup/varnish-2.1.5/redhat'

make[1]: Leaving directory `/root/varnish_setup/varnish-2.1.5/redhat'

make[1]: Entering directory `/root/varnish_setup/varnish-2.1.5'

make[2]: Entering directory `/root/varnish_setup/varnish-2.1.5'

make[2]: Nothing to be done for `install-exec-am'.

/root/varnish_setup/varnish-2.1.5/install-sh -d -m 0755 /usr/var/varnish

test -z &/usr/lib/pkgconfig& || mkdir -p -- &/usr/lib/pkgconfig&

/usr/bin/install -c -m 644 'varnishapi.pc' '/usr/lib/pkgconfig/varnishapi.pc'

make[2]: Leaving directory `/root/varnish_setup/varnish-2.1.5'

make[1]: Leaving directory `/root/varnish_setup/varnish-2.1.5'

[root@node18 varnish-2.1.5]#

[root@node18 varnish-2.1.5]# whereis varnish

varnish: /usr/etc/varnish /usr/include/varnish

[root@node18 varnish-2.1.5]# whereis varnishd

varnishd: /usr/sbin/varnishd /usr/man/man1/varnishd.1

[root@node18 varnish-2.1.5]# ls /usr/etc/varnish/default.vcl

/usr/etc/varnish/default.vcl

[root@node18 varnish-2.1.5]#