In this tutorial I will guide, how to install Varnish 4 version on CentOS 7 / RHEL 7.Varnish is a frontend web proxy and cache, designed to improve performance for busy, dynamic web sites. By redirecting traffic to static pages whenever possible, varnish reduces the number of dynamic page calls, also reduce the load.
Add the EPEL Repository
First, we’ll install the EPEL repository:
rpm -iUvh http://dl.fedoraproject.org/pub/epel/7/x86_64/e/epel-release-7-5.noarch.rpm
Install Varnish
yum -y update yum -y install varnish
Start Varnish
To configure varnish to start at boot, run the following command:
systemctl enable varnish
To start varnish, run the following command as root:
systemctl start varnish
To check the status of varnish, run the command as root:
systemctl status varnish
To check the running version of Varnish:
varnishd –V
By default Varnish is configured to listen on port 6081 and it need your web server to be local, or on the same server and listening on port 8080.
Configuration File Locations
Default configuration file can be found at:
/etc/varnish/default.vcl
An example configuration can be found in example.vcl:
/usr/share/doc/varnish-4.0.1/example.vcl
That’s all there is to do and it is that simple to install Varnish on CentOS 7. Hopefully that helps and do comment below sharing your thoughts and experiences.