Varnish实现动静分离（三）

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实验环境（Centos7）

主机名            IP                版本
varnish        192.168.14.210    4.0.5
web1(nginx)    192.168.14.211    nginx/1.12.2
tomcat         192.168.14.213    
client         192.168.14.212

注意：本篇文章是在第二篇文章基础上稍作修改

一、varnish：192.168.14.210

1、配置静态页面后端主机和动态页面后端主机IP和端口

backend websrv1 {.host = "192.168.14.211";    #后端主机IP地址.port = "80";    #后端主机监听的端口
}
backend tomcat1 {.host = "192.168.14.213";.port = "8080";
}

backend websrv1 {.host = "192.168.14.211";    #后端主机IP地址.port = "80";    #后端主机监听的端口
}
backend tomcat1 {.host = "192.168.14.213";.port = "8080";
}

2、先判断是否是jsp动态页面内容，如果是就选择tomcat主机，否则就选择websrv主机

sub vcl_recv {if (req.url ~ "(?i)\.jsp$") {set req.backend_hint = tomcat1;}else{set req.backend_hint = websrv1;}
}

3、重载配置文件，并清除所有缓存以免影响实验

[root@varnish ~]# varnish_reload_vcl
[root@varnish ~]# varnishadm ban req.url "~" /

4、varnish配置详情

[root@varnish ~]# cat  /etc/varnish/default.vcl
#
# 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;
# Default backend definition. Set this to point to your content server.backend websrv1 {.host = "192.168.14.211";    #后端主机IP地址.port = "80";    #后端主机监听的端口
}
backend tomcat1 {.host = "192.168.14.213";.port = "8080";
}
#创建后端主机组
sub vcl_init {
#    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.
#        set req.backend_hint = websrv.backend();if (req.url ~ "(?i)\.jsp$") {set req.backend_hint = tomcat1;}else{set req.backend_hint = websrv1;}
}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.
}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) {set resp.http.X-Cache = "Hit via "+ server.ip;}else {set resp.http.X-Cache = "Miss via "+ server.ip;}
}

二、web1：192.168.14.211

1、具体配置查看第一篇文章，不需要改变

三、tomcat：192.168.14.213

tomcat官网https://tomcat.apache.org/

1、解压下载好的压缩包

[root@tomcat ~]# tar -zxvf apache-tomcat-9.0.8.tar.gz

2、下载java包解压，并配置环境变量

[root@tomcat ~]# tar -zxvf jdk-8u91-linux-x64.tar.gz -C /usr/local/
[root@tomcat ~]# vim /etc/profile
#在最下面添加
JAVA_HOME=/usr/local/jdk1.8.0_91
export JAVA_HOME
CLASSPATH=.:$JAVA_HOME/lib
export CLASSPATH
PATH=$PATH:$JAVA_HOME/bin:$CLASSPATH
export PATH
#保存退出
[root@tomcat ~]# source /etc/profile
[root@tomcat ~]# java -version
java version "1.8.0_91"
Java(TM) SE Runtime Environment (build 1.8.0_91-b14)
Java HotSpot(TM) 64-Bit Server VM (build 25.91-b14, mixed mode)

3、关闭防火墙和selinux

[root@tomcat ~]# systemctl stop firewalld
[root@tomcat ~]# systemctl disable firewalld
[root@tomcat ~]# sed -i 's/SELINUX=enforcing/SELINUX=disabled/' /etc/selinux/config

4、启动服务

[root@tomcat ~]# apache-tomcat-9.0.8/bin/startup.sh

5、查看8080端口是否开启

[root@tomcat ~]# netstat -ntlp|grep 80
tcp6       0      0 127.0.0.1:8005          :::*                    LISTEN      6930/java           
tcp6       0      0 :::8009                 :::*                    LISTEN      6930/java           
tcp6       0      0 :::8080                 :::*                    LISTEN      6930/java

四、客户端：192.168.14.212

1、看到不管是jsp还是html都能自动跳转到后端主机访问成功，然后缓存到varnish

[root@client ~]# curl -I http://192.168.14.210/index.jsp
HTTP/1.1 200 OK
Content-Type: text/html;charset=UTF-8
Date: Tue, 01 Oct 2019 15:54:34 GMT
X-Varnish: 33518
Age: 0
Via: 1.1 varnish-v4
X-Cache: Miss via 192.168.14.210
Content-Length: 11228
Connection: keep-alive[root@client ~]# curl -I http://192.168.14.210/index.jsp
HTTP/1.1 200 OK
Content-Type: text/html;charset=UTF-8
Date: Tue, 01 Oct 2019 15:54:34 GMT
X-Varnish: 98727 33519
Age: 2
Via: 1.1 varnish-v4
X-Cache: Hit via 192.168.14.210
Content-Length: 11228
Connection: keep-alive[root@client ~]# curl -I http://192.168.14.210/index.html
HTTP/1.1 200 OK
Server: nginx/1.12.2
Date: Wed, 24 Jan 2018 02:57:43 GMT
Content-Type: text/html
Content-Length: 17
Last-Modified: Tue, 23 Jan 2018 13:59:55 GMT
ETag: "5a673fdb-11"
X-Varnish: 98729
Age: 0
Via: 1.1 varnish-v4
X-Cache: Miss via 192.168.14.210
Connection: keep-alive[root@client ~]# curl -I http://192.168.14.210/index.html
HTTP/1.1 200 OK
Server: nginx/1.12.2
Date: Wed, 24 Jan 2018 02:57:43 GMT
Content-Type: text/html
Content-Length: 17
Last-Modified: Tue, 23 Jan 2018 13:59:55 GMT
ETag: "5a673fdb-11"
X-Varnish: 33521 98730
Age: 3
Via: 1.1 varnish-v4
X-Cache: Hit via 192.168.14.210
Connection: keep-alive[root@client ~]#