It may seem trivial to enable HTTP/2 support in Nginx, but there are some caveats you may face. Let's go through the ones I faced during the HTTP/2 configuration for our sites.

More and more companies have started utilising HTTP/2 to improve performance of their sites and user experience. It's quite easy to enable HTTP/2, but how can you enable HTTP/2 with SSL if you have Varnish cache in front of your infrastracture? As Varnish 4.* doesn't support SSL, we need to find a way to make all these components work together.