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

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

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

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
★ 
★ }

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

客户端访问http://127.0.0.1/    #varnish服务器会根据算法分配流量

# This is an example VCL file for Varnish. 
# 
# It does not do anything by default, delegating control to the 
# builtin VCL. The builtin VCL is called when there is no explicit 
# return statement. 
# 
# See the VCL chapters in the Users Guide at https://www.varnish-cache.org/docs/ 
# and http://varnish-cache.org/trac/wiki/VCLExamples for more examples. 
# Marker to tell the VCL compiler that this VCL has been adapted to the 
# new 4.0 format. 
vcl 4.0; 
import directors;

probe check {                           #定义健康状态检测
.url = "/";                             #检测的路径URL
.window = 5;                            #检测次数
.threshold = 4;                         #检测次数中成功多少次才算健康
.interval = 2s;                         #两次健康状态检测之间的时间间隔
.timeout = 1s;                          #检测超时时长
}

backend websrv1 {                       #添加后端主机websrv1
.host = "10.1.10.66";                   #后端主机IP地址
.port = "80";                           #后端主机监听的端口
.probe = check;                         #调用健康状态机制
}

backend websrv2 { 
.host = "10.1.10.67"; 
.port = "80"; 
.probe = check; 
}

 
sub vcl_init {                          #创建后端主机组
new websrv = directors.round_robin();   #设置主机组的调度算法，有两种，另一种为random
websrv.add_backend(websrv1);            #将后端主机加入到组中
websrv.add_backend(websrv2);            #将后端主机加入到组中
}

sub vcl_recv { 
# Happens before we check if we have this in cache already. 
# 
# Typically you clean up the request here, removing cookies you don't need, 
# rewriting the request, etc.


if (req.url ~ "(?i)\.php$") {           #将.php结尾的文件发往websrv1
set req.backend_hint = websrv1; 
} else { 
set req.backend_hint = websrv2;         #将其他结尾的文件发往websrv1 
}


if (req.url ~"(?i)^/login") {           #设置/login目录不检测缓存直接送达后端主机 
return(pass); 
}

if ( req.method == "PURGE") {           #自定义purge方法 
return(purge); 
}
}

 

sub vcl_purge {                         #调用purge方法，返回你想返回的状态码及其信息
return(synth(200,"Pugred.")); 
}


sub vcl_backend_response { 
# Happens after we have read the response headers from the backend. 
# 
# Here you clean the response headers, removing silly Set-Cookie headers 
# and other mistakes your backend does.

if (beresp.http.cache.control !~ "s-maxage") { 
if (bereq.url ~ "(?i)\.jpg$") {? 
set beresp.ttl = 3600s;                  #设置.jpg结尾的图片TTL时长，加长其缓存时长 
unset beresp.http.Set-Cookie;            #取消追踪图片的cookie信息 
} 
}

if (beresp.http.cache.control !~ "s-maxage") { 
if (bereq.url ~ "(?i)\.css$") { 
set beresp.ttl = 3600s; 
unset beresp.http.Set-Cookie; 
}
}
}


sub vcl_deliver { 
# Happens when we have all the pieces we need, and are about to send the 
# response to the client. 
# 
# You can do accounting or modifying the final object here. 
if (obj.hits>0) {                        #自定义响应报文的首部信息
set resp.http.X-Cache = "Hit via "+ server.ip; 
}else { 
set resp.http.X-Cache = "Miss via "+ server.ip; 
}
}