varnish加速网站

1、安装varnish， 安装epel源

yum install epel-release -y
yum install varnish

 

14.3.1 vcl置文件：
ls /etc/varnish/default.vcl
varnish主配置文件
vim /etc/varnish/varnish.params

启varnish服务：
systemctl rstart varnish

 

14.4.1 实战：配置 varnish服务器 本机ip为63

vi /etc/varnish/default.vcl

改：
7 backend default {
8 .host = "127.0.0.1";
9 .port = "80";
10 }
为：
backend web1 {
.host = "192.168.1.64";
.port = "80";
}

 

###查看缓存命中情况
在：
90 # sub vcl_deliver {
91 # return (deliver);
92 # }
追加：

sub vcl_deliver {
  if (obj.hits>0) {
  set resp.http.X-Cache = "HIT from xuegod cache";
  }
  else {
  set resp.http.X-Cache = "MISS from xuegod cache";
  }
  return (deliver);
}

或

sub vcl_deliver {
#定义缓存响应头部
if (obj.hits>0) {
set resp.http.X-Cache = "HIT via " + server.ip;
} else {
set resp.http.X-Cache = "MISS from " + server.ip;
}
}

 

注意：obj.hits>0 大于号前后无空格

14.4.2 配置varnish服务端口

 vi /etc/varnish/varnish.params
改：
66 VARNISH_LISTEN_PORT=6081
为：
VARNISH_LISTEN_PORT=80

 

14.4.3 启动varnish服务器

 systemctl restart varnish

 

命中测试
[root@web63 ~]# curl -I 192.168.1.63
HTTP/1.1 200 OK
Date: Wed, 21 Nov 2018 13:36:26 GMT
Server: Apache/2.4.6 (CentOS) PHP/5.4.16
X-Powered-By: PHP/5.4.16
Content-Type: text/html; charset=UTF-8
X-Varnish: 2
Age: 0
Via: 1.1 varnish-v4
X-Cache: MISS from 192.168.1.63 #没有命中
Connection: keep-alive

[root@web63 ~]# curl -I 192.168.1.63
HTTP/1.1 200 OK
Date: Wed, 21 Nov 2018 13:36:26 GMT
Server: Apache/2.4.6 (CentOS) PHP/5.4.16
X-Powered-By: PHP/5.4.16
Content-Type: text/html; charset=UTF-8
X-Varnish: 32770 3
Age: 14
Via: 1.1 varnish-v4
X-Cache: HIT via 192.168.1.63 #命中
Content-Length: 48050
Connection: keep-alive

 

14.5.2 配置xuegod62为web2服务器

yum install httpd -y
echo 192.168.1.62 > /var/www/html/index.html
hostnamectl set-hostname xuegod62.cn 
[root@xuegod62 ~]# vim /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.1.62 xuegod62.cn
systemctl start httpd

 
64web上也写入测试页面

echo 192.168.1.64 > /var/www/html/index.html

 

配置xuegod63 上的varnish服务器：

vim /etc/varnish/default.vcl
改：
backend web1 {
.host = "192.168.1.64";
.port = "80";
}
为：
backend web1 {
.host = "192.168.1.64";
.port = "80";
}
backend web2 {
.host = "192.168.1.62";
.port = "80";
}


[root@xuegod63 ~]# vim /etc/varnish/default.vcl #在sub vcl_deliver 处定义以下内容：
sub vcl_recv {
if (req.http.host ~ "(?i)^(www.)?xuegod.cn$") {
set req.http.host = "www.xuegod.cn";
set req.backend_hint = web1;
} elsif (req.http.host ~ "(?i)^bbs.xuegod.cn$") {
set req.backend_hint = web2;
return(hash);
}
}

 

 

systemctl reload varnish

 

在xuegod62上测试：
[root@xuegod62 ~]# vim /etc/hosts #添加hosts文件

127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.1.62 xuegod62.cn
192.168.1.63 www.xuegod.cn
192.168.1.63 bbs.xuegod.cn

[root@xuegod62 ~]# yum install elinks -y
[root@xuegod62 ~]# elinks www.xuegod.cn --dump
192.168.1.64
[root@xuegod62 ~]# elinks bbs.xuegod.cn --dump
192.168.1.62

 

varnish 参数说明

/usr/local/sbin/varnishd -f /usr/local/etc/varnish/default.vcl -a :6081 -P /var/run/varnish.pid -s malloc,256m

执行完毕后，Varnish将进入后台运行，同时返回命令行状态。需要注意的是，Varnish运行时会同时启动两个进程，一个主进程，一个是子进程，如果子进程出现问题，主进程将重新生成一个子进程。

Varnishd 的启动选项
-f : 指定配置文件位置

-a : varnish监听的本地地址和端口。

-P :PID文件位置，用来关闭Varnish

-s :cache配置。默认使用256M内存