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Troubleshoot - by Hostrare

Update On: 23 Jul 2021How to install Varnish Cache

Varnish Cache is a web accelerator, sometimes attributed to as an HTTP accelerator or a reversed HTTP proxy, that will significantly enhance your web performance.
Varnish speeds up a website by saving a copy of the page served by the webserver 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 webserver.
This means that your web server requires to handle less traffic and your website’s administration and scalability go through the roof. 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 the Apache listening port to a different 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 over YUM or manually download varnish RPM.

yum install varnish

or

for EL6

wget https://repo.varnish-cache.org/redhat/varnish-3.0/el6/noarch/varnish-release/varnish-release-3.0-1.el6.noarch.rpm

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

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

vi /etc/sysconfig/varnish

VARNISH_LISTEN_PORT=80

Edit proxy settings in varnish

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

backend default {.host = "184.82.165.4";.port = "82";}sub vcl_recv {if (req.url ~ "\.(png|gif|jpg|swf|css|js)$") {return(lookup);}}# strip the cookie before the image is inserted into cache.sub vcl_fetch {if (req.url ~ "\.(png|gif|jpg|swf|css|js)$") {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.

varnishstat

Solution 2

Varnish Cache Integration in cPanel

This opensource w3tools will switch previous varnish installation. Please backup your apache configuration file httpd.conf before proceed.

Installation:

# cd /usr/local/src# wget "https://raw.githubusercontent.com/itseasy21/w3tools-varnish/master/install.sh" -O /usr/local/src/varnish-install.sh# chmod +x varnish-install.sh# ./varnish-install.sh