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How to build a CDN in CentOS7 system, for this problem, this article details the corresponding analysis and answer, hoping to help more small partners who want to solve this problem find a simpler and easier way.

1. Test requirements

CDN Basic Experiment 2---Caching Based on nginx+squid

Build two web services using nginx.

A source site (then domain name: www.cdntest.com) configured to implement functionality: providing accessible web services;

The other is a reverse proxy that receives user requests. The configuration implementation function is: proxy to squid of the backend.

2. Build a squid service and configure it to achieve the following functions:

1) txt cache 1 month, jpg file not cached

2) Configure the back-to-source function, and the source site is the backend web server (nginx)

The detailed structure is as follows

Fig. 1

II. Experimental environment

Fig. 2

III. Preparation for the test

centos7 software source settings

Backup the original.repo file

[root@localhost ~]# mkdir /etc/yum.repos.d/bacakup

[root@localhost~]# mv /etc/yum.repos.d/* /etc/yum.repos.d/bacakup

Download Ali's yum source

[root@localhost~]# wget -O /etc/yum.repos.d/Centos-7.repo http://mirrors.aliyun.com/repo/Centos-7.repo

[root@localhost~]# wget -O /etc/yum.repos.d/epel-7.repo http://mirrors.aliyun.com/repo/epel-7.repo

Clear and create metadata cache

[root@localhost~]# yum clean all

[root@localhost~]# yum makecache

IV. Service Configuration

Nginx-Proxy virtual machine configuration

install Nginx

[root@proxy ~]# yum install -y nginx

Configuration/etc/nginx/nginx.conf Other default (centos6.x system is edited/etc/nginx/conf.d/defualt.conf)

[root@proxy ~]# vim /etc/nginx/nginx.conf

server {

listen 80 default_server; #This port 80, the default is fine, can be changed according to actual needs

server_name www.cdntest.com; #This can be customized

location / {

proxy_pass http://192.168.56.5; #Fill in the IP of the squid server

}

}

Activate and activate nginx

[root@proxy ~]# systemctl enable nginx.service

[root@proxy ~]# systemctl start nginx.service

Squid cache server configuration

Install Squid

[root@squid ~]# yum install squid

Configure/etc/squid/squid.conf, save the rest as default

[root@squid ~]# vim /etc/squid/squid.conf

acl url_image url_regex -i ^http://.*\. jpg$

no_cache deny url_image

http_access allow deny#In the experiment, all (deny changed to allow) can be allowed, and the actual production environment can be configured according to the situation.

http_port 192.168.56.5:80 accel vhost #Configure squid local NIC and port 80. If dual NIC, you can select the one used to access the source server.

cache_peer 192.168.56.4 parent 80 0 originserver #This is the origin server for the reverse proxy

cache_dir ufs /var/spool/squid 100 16 256 #cache directory

The requested URL/log/squid/cache.log was not found on this server.

refresh_pattern -i \.txt $43200 100% 43200 #Cache rules, txt file saved for one month

Activate and start squid services

[root@squid ~]# systemctl enable squid.service

[root@squid ~]# systemctl start squid.service

Nginx-Web Server Configuration

Install nginx as above.

Configuration/etc/nginx/nginx.conf

[root@server ~]# vim /etc/nginx/nginx.conf

server {

server_name www.cdntest.com; #Configure domain name, others can be kept by default

}

Activation and activation services as above.

Note: In order to meet the requirements of the experiment, you must have.txt files and.jpg files on your nginx-web server.

5. Client access and validation cache

Edit the C:\Windows\System32\drivers\etc\hosts file on Windows

Add the following two lines

192.168.56.3 www.cdntest.com

192.168.56.3 cdntest.com #This enables Windows browsers to access this domain directly

Nginx-Proxy This reverse proxy server

Enter www.cdntest.com or cdntest.com in your browser and access the following

Fig. 3

Verify cache success

Executed under nginx-proxy server

[root@proxy ~]# curl -I http://192.168.56.5/txt/5.txt #view txt cache (Figure 4)

[root@proxy ~]# curl -I http://192.168.56.5/images/work-1.jpg #View image cache (Figure 5)

return results

Fig. 4

Fig. 5

About how to build a CDN in CentOS7 system, the answer to the question is shared here. I hope the above content can be of some help to everyone. If you still have a lot of doubts, you can pay attention to the industry information channel to learn more about it.

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