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Varnish实现Web站点加速

Varnish 是一款高性能的开源HTTP加速器


◆编译安装Varnish◆

1.安装依赖包

#yum install -y libtool ncurses-devel pcre-devel libxslt libedit python-imaging python-docutils

yum install -y pcre-devel python-docutils libedit-dev*

2.编译安装Varnish

wget http://varnish-cache.org/_downloads/varnish-6.0.0.tgz

tar -xzvf varnish-6.0.0.tgz

cd varnish-6.0.0/

./configure --prefix=/usr/local/varnish6

make && make install

ln -s /usr/local/varnish6/sbin/* /usr/sbin/
ln -s /usr/local/varnish6/bin/* /usr/local/bin/

cp -a /usr/local/varnish6/share/doc/varnish/example.vcl /usr/local/varnish6/default.vcl

◆Varnish实现负载均衡并实现页面缓存◆

1.编辑Varnish主配置文件,在相应的区域追加写入以下标★语句

vim /usr/local/varnish/default.vcl

15 # Default backend definition. Set this to point to your content server.
16 backend default {
17 .host = "127.0.0.1";
18 .port = "8080";
19 }
20
★ backend web1 { #均衡web主机1
★ .host="192.168.1.13";
★ .port="80"; #指定端口
★ .probe = { #开启健康检查
★ .url = "/"; #请求的URL路径
★ .interval = 5s; #查询间隔时间
★ .timeout = 1s; #超时时间
★ .window = 5; #滑动窗
★ .threshold = 3; #上次检查.window数量的多少
★ }
★ }
★ backend web2 {
★ .host="192.168.1.14"; #均衡web主机2
★ .port="80"; #指定端口
★ .probe = { #开启健康检查
★ .url = "/"; #请求的URL路径
★ .interval = 5s; #查询间隔时间
★ .timeout = 1s; #超时时间
★ .window = 5; #滑动窗
★ .threshold = 3; #上次检查.window数量的多少,
★ }
★ }

★ import directors; #加载directors模块

★ sub vcl_init { #缓存及加速-03单-高性能缓存服务器

★ new bar = directors.round_robin();
★ bar.add_backend(web1);
★ bar.add_backend(web2);

★ }

★ sub vcl_recv {

★ set req.backend_hint = bar.backend(); #指定backend

★ }

2.检查配置文件,并启动Varnish

varnishd -C -f /usr/local/varnish6/default.vcl    #检查语法

varnishd -f /usr/local/varnish6/default.vcl #启动

pkill varnishd #关闭Varnish

varnishlog #查看Varnish日志

netstat -anpt | grep varnishd #检查是否启动

3.验证环节

elinks http://127.0.0.1/        #varnish服务器会根据算法分配流量

版权声明:本博客文章与代码均为学习时整理的笔记,文章 [均为原创] 作品,转载请 [添加出处] ,您添加出处是我创作的动力!





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