Varnish WordPress

Table of Contents

Description

This is a plugin for wordpress to intergrate the varnish cache for high performance websites.

This plugin will purge the cache on,

Post changes (new, edit, trash, delete).
Page changes (add, edit, remove)
Comment changes (add, edit, approve, unapprove, spam, trash, delete)
Theme changes

Features

At present some of the features are,

Multiple varnish backends
Manually purge the cache
Enable/Disable Feed Purging
Ability to purge entire cache on changes
Debug logging
Minimize number of purges and remove duplicate purges for speed on larger installations
Supports varnish 4 + 5
Support for Woocommerce

Speed

Our tests show that by utilizing varnish you gain a ~70x capacity increase over standard WordPress making you resistant to traffic floods (slashdot, digg, reddit, stumbleupon).

Installation

To install the WordPress plugin.

Get the latest version from https://www.admingeekz.com/files/varnish-wordpress.zip
Copy the varnish-wordpress folder to wp-content/plugins/
Login to wp-admin
Go to Plugins->Installed Plugins on the left menu
Under “Varnish WordPress” click “Activate”
You should now see the varnish menu under “Settings”

To install the varnish VCL.

Copy the file “default.vcl” provided with this plugin to your varnish installation path (/etc/varnish/default.vcl on most systems)
Configure the backend in the default.vcl to point to the ip and port your webserver(s) are running on
Restart varnish

To configure the WordPress plugin

In the varnish backends box input the backends we need to access to purge the cache. (Format: ip:port)
Check the enabled box
Click Save

The setup should be complete. You can enable Debug Logging temporarily to monitor what the plugin is doing. Test by enabling debug logging and adding a new post.