#Varnish Flush

We are going to be using primarily the bancommand within the varnishadm tool. You want to run this command, while connecting to the server running Varnish.

#Flushing the entire Cache

varnishadm "ban req.http.host ~ .*"

#Flushing A Single Varnish Page

If we want to flush a single page from varnish, we can filter on req.url which will be the URI of the page. For example if we want to purge the contact page, we could run the following

varnishadm "ban req.url == /contact"

Now if we want to purge all pages starting with the word test- we could run

varnishadm "ban req.url ~ /test-"

If we want to target a single store / storefront, we can also include a filter on req.http.host

varnishadm "ban req.url == /contact && req.http.host == www.example.com"

#Flushing an entire Storefront / Site

If we want to flush an entire storefront / site, we can run the ban command, specifying just the req.http.host

varnishadm "ban req.http.host == www.example.com"

#Flushing Singular Products

Getting a bit more complex / Magento specific, we can flush singular products and all the category / CMS pages that product is referenced in. Todo this we can use the X-Magento-Tags-Pattern tag and the product ID. For example if we want to flush product ID 512, we would use the following CURL Command

curl -XPURGE -H 'X-Magento-Tags-Pattern: (^|,)cat_p_512(,|$)' localhost:6081