Double Shot #1701

How to Create Custom Authentication Strategies with Devise and Warden - Don't throw the baby out with the bathwater just because you have unusual authentication requirements.
The Children's Illustrated Guide to Kubernetes - You probably still won't understand Kubernetes completely after reading this, but at least you'll not understand it with cute pictures.
Software Performance & Scalability: A Cheatsheet - Things to think about as you optimize large systems.