Kubectl kustomize

External

• https://kubernetes.io/blog/2018/05/29/introducing-kustomize-template-free-configuration-customization-for-kubernetes/

Internal

• kubectl

Overview

Reads instructions from a kustomization.yaml file and generates syntactically valid and complete API resource manifests at stdout. The generated content may contain multiple resource representations, separated by ---.

kubectl kustomize <dirname>

The directory specified as argument must contain kustomization.yaml.

It seems to add prefixes to names, update image tags, adds namespace metadata, "yaml-cleans" according to rules that have yet to be elucidated.

kustomization.yaml Example

namePrefix:
images:
- name: something
  newTag: ...
namespace: ...   
resources:
- manifest-1.yaml
- manifest-2.yaml
patchesStrategicMerge:
- file1.yaml