How to Automate Coubernets Cluster Upgrades

A simple reason you might want to upgrade is you know your application has had a new version. The interesting thing about the way coubernettis works is, because it's declarative, one particular perimeter might get injected into 15 or 20 different coubernetts objects. There's no separation of concerns between configuration and operational information. And so some things might come out differently if you're running a different version of coubernetes.