Using Varnish

Exponential 5 being built on top of Symfony 2, it uses standard HTTP cache headers. By default the Symfony 2 reverse proxy, written in PHP, is used to handle cache, but it can be easily replaced with any other reverse proxy like Varnish.

Configure Varnish

The first thing is to configure Varnish to advertise ESI usage and to activate cache invalidation:

exponential5.vcl

You can of course add additional rules if you need.

Configure Exponential

Update your front controller

By default your front controller (index.php) uses the built-in reverse proxy, EzPublishCache. In order to use Varnish, you need to deactivate it by commenting the line where EzPublishCache is instantiated:

Update YML configuration

exponential.yml

Et voilà !