Varnish can be a good solution for a faster Apache, Nginx server. It will act like a cache and proxy in your server once installed. Can be a good option for high load server with lot of traffic.

First install the epel respository in your Centos 7 server since it is part of non-standart packages.

[code]yum install -y epel-release[/code]

Update the Centos system with thw following command:

[code]yum -y update[/code]

Install varnish

[code]yum -y install varnish[/code]

Configure Varnish to run at server start up

[code]systemctl enable varnish[/code]

Start Varnish

[code]systemctl start varnish[/code]

In order to be sure the service started successfully please type the following command

[code]systemctl status varnish[/code]

Check the Varnish version installed in your server

[code]varnishd -V[/code]

After checked successfully please check the following file for the basic configuration

[code]nano /etc/varnish/default.vcl[/code]

Edit the following lines into default.vcl

[code]change VARNISH_LISTEN_POR to 80[/code]

Change the following lines as followed

[code]backend default {
.host = “”;
.port = “8080”;
} [/code]

change the apache configuration as well to work with Varnish

[code]nano /etc/httpd/conf/httpd.conf[/code]

Change listen port from 80 to 8080

[code]Listen 8080[/code]

Restart Apache and Varnish

[code]sudo apachectl restart
systemctl restart varnish[/code]

If you will open your ip from the browser and check the apache log after you will see logs like this:

[code]HTTP/1.1 200 OK
Date: Wed, 04 Nov 2015 10:21:07 GMT
Server: Apache/2.4.6 (CentOS)
Last-Modified: Fri, 02 Oct 2015 10:36:53 GMT
ETag: “6c-5211cdbf61c14”
Content-Length: 108
Content-Type: text/html; charset=UTF-8
X-Varnish: 32770
Age: 0
Via: 1.1 varnish-v4
Connection: keep-alive[/code]



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