librenms-librenms/doc/Extensions/Varnish.md

Setting up Varnish

This document will explain how to setup Varnish for LibreNMS.

Varnish installation

This example is based on a fresh LibreNMS install, on a minimimal CentOS installation. In this example, we'll use the default package available through yum.

• Install Varnish

yum install varnish
chkconfig varnish on

• Confirm that Varnish has been installed

varnishd -V
varnishd (varnish-2.1.5 SVN )

• Change the webservers port to 8080, since we'll put Varnish in front(Or whatever you prefer)

• Point Varnish towards the webserver by editing the default.vcl

vi /etc/varnish/default.vcl

backend default {
  .host = "127.0.0.1";
  .port = "8080";
}

• Change the default port Varnish listens on

vi /etc/sysconfig/varnish

VARNISH_LISTEN_PORT=80

• Restart webserver(Apache in this case) and start Varnish afterwards

service httpd restart
service varnish start

• Browse around the webui to build up the cache, verify that the cache is working afterwards

varnishstat