Kubectl kustomize

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Revision as of 17:28, 23 August 2019 by Ovidiu (talk | contribs) (→‎Overview)
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External

Internal

Overview

The "kustomize" logic reads a series of source API resource manifests, 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 ---. The output can be further processed by other tools or streamed directly into kubectl for deployment to a cluster.

kubectl kustomize <dirname> > output.yaml

The directory specified as argument must contain kustomization.yaml.

A kustomization.yaml example follows:

# add the specified labels to all resources
commonLabels:
  app: hello
# add the specified annotations to all resources
commonAnnotations:
  ...
# add the specified common prefix to all resource names
namePrefix:
resources:
- deployment.yaml
- configMap.yaml
- service.yaml

kustomization.yaml Example

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

TODO

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