“A month or two ago, I decided to remove Varnish from my site and replace it with Nginx’s built-in caching system. I was already using Nginx to proxy to my Python sites, so getting rid of Varnish meant one less thing to fiddle with. I spent a few days reading up on how to configure Nginx’s cache and overhauling the various config files for my Python sites (yes, irony). In the course of my reading I bookmarked a number of interesting Nginx modules to return to, among them the Image Filter module.
I thought it would be neat to combine Nginx’s reverse proxying, caching, and image filtering to create a thumbnailing server for my images hosted on S3. If you look closely at the
<img> tag below (and throughout this site), you can see Nginx in action…”