Using Kustomization for hierarchical cluster structures

This is not a typo. Kubectl recently incorporated the functionality of kustomize (https://kustomize.io/). It is a way to configure Kubernetes without templates. There was a lot of drama about the way the kustomize functionality was integrated into kubectl itself, since there are other options and it was an open question if kubectl should be that opinionated. But, that’s all in the past. The bottom line is that kubectl apply -k unlocks a treasure trove of configuration options. Let’s understand what problem it helps us to solve and take advantage of it to help us manage Hue.

Understanding the basics of kustomize

Kustomize was created as a response to template-heavy approaches like Helm to configure and customize Kubernetes clusters. It is designed around the principle of declarative application management. It takes a valid Kubernetes YAML manifest (base) and specialize it or extend it by overlaying additional YAML patches...