Varnish/Nginx Proxy CachingWordPress Plugin

complete wordpress varnish cache 3.x/4.x/5.x and Nginx Proxy Cache integration.

This plugin handles all integration with Varnish Cache and Nginx Proxy Cache. It was designed for high traffic websites.

Main features

• admin interface, see screenshots
• console for manual purges, supports regular expressions so you can purge an entire folder or just a single file
• supports every type of varnish cache implementation, see screenshots for examples
• unlimited number of Varnish Cache servers
• use of custom headers when communicating with Varnish Cache does not interfere with other caching plugins, cloudflare, etc
• Varnish Cache configuration generator
• purge key method so you don’t need to setup ACLs
• debugging
• actively maintained

You can control the following from the varnish caching admin panel :

• Enable/Disable caching
• Homepage cache TTL
• Cache TTL (for every other page)
• IPs/Hosts to clear cache to support every type of Varnish Cache implementation
• Override default TTL in posts/pages
• Purge key based PURGE
• Logged in cookie
• Debugging option
• console for precise manual purges

This plugin also auto purges varnish cache / Nginx Proxy Cache when your site is modified.

varnish caching sends a PURGE request to Varnish Cache / Nginx Proxy Cache when a page or post is modified. This occurs when editing, publishing, commenting or deleting an item, and when changing themes.

Not all pages are purged every time, depending on your Varnish / nginx proxy cache configuration. When a post, page, or custom post type is edited, or a new comment is added, only the following pages will purge:

• The front page
• The post/page edited
• Any categories or tags associated with the page

Varnish Cache / Nginx Proxy Cache is a web application accelerator also known as a caching http reverse proxy. You install it in front of any server that speaks HTTP and configure it to cache the contents. This plugin does not install Varnish/Nginx for you, nor does it configure Varnish/Nginx for WordPress. It’s expected you already did that on your own using the provided config files.

Inspired from the following :

• https://wordpress.org/plugins/varnish-http-purge/
• https://github.com/dreamhost/varnish-vcl-collection/

• You must install Varnish Cache/Nginx Proxy Cache on your server(s)
• Go to the configuration generator. Fill in the backends/ACLs then download the configuration files
• Use these configuration files to configure Varnish Cache server(s). Usualy the configuration files are in /etc/varnish. In most cases you must put the downloaded configuration files in /etc/varnish and restart Varnish Cache
• The configuration generator does not support Nginx for now. Read the Nginx documentation on how to enable proxy cache

Or use the provided Varnish Cache configuration files located in /wp-content/plugins/vcaching/varnish-conf folder.

You can also use the purge key method if you can’t setup ACLs. You must fill in lib/purge.vcl the purge key.