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How to install Varnish Cache - TeknikDATA Hosting Hizmetleri

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How to install Varnish Cache

Varnish Cache is a web accelerator, sometimes referred to as a HTTP accelerator or a reverse HTTP proxy, that will significantly enhance your web performance.

Varnish speeds up a website by storing a copy of the page served by the web server the first time a user visits that page. The next time a user requests the same page, Varnish will serve the copy instead of requesting the page from the web server.

This means that your web server needs to handle less traffic and your website’s performance and scalability go through the roof. In fact Varnish Cache is often the single most critical piece of software in a web based business.

How to install varnish cache on cpanel

First, you need to change Apache listening port to another port 82 or anything else.

vi /etc/httpd/conf/httpd.conf

or you can change via WHM -> Tweak Settings -> set value of field Apache non-SSL IP/port to 82.

You can install varnish through YUM or manually download varnish RPM.

yum install varnish


for EL6


rpm ivh varnish-release-3.0-1.el6.noarch.rpm

Once installation completed, Edit configuration file and change listening port to 80

vi /etc/sysconfig/varnish


Edit proxy settings in varnish

vi /etc/varnish/default.vcl or check with /usr/local/varnish/etc/varnish/vhost.vcl

backend default {
.host = "";
.port = "82";

sub vcl_recv {
if (req.url ~ "\.(png|gif|jpg|swf|css|js)$") {

# strip the cookie before the image is inserted into cache.

sub vcl_fetch {
if (req.url ~ "\.(png|gif|jpg|swf|css|js)$") {
unset beresp.http.set-cookie;

Enable chkconfig  and restart varnish service

chkconfig varnish on
service varnish start

Thats all… You can monitor varnish cache through this monitoring tool.


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