kubed-krm 0.0.4

Python implementation of the Kubernetes KRM Function Interface

Kubed KRM

A python Implementation of KRM function by Kustomize and Google.

Random

Generate a random string or number and stamp it into target resource fields. Configure keepers and the value is deterministically derived from the keeper field values — same inputs, same output — like Terraform's random_string. Useful for getting a Job name that only changes when upstream values actually change (a workaround for Kustomize hashing ConfigMap names after all transformers have run).

apiVersion: krm.kubed.io
kind: Random
metadata:
  name: random-string
  annotations:
    config.kubernetes.io/function: |
      exec:
        path: kubectl-kubed
spec:
  type: string
  keepers:
  # explicit fieldPaths on the keeper
  - kind: Deployment
    fieldPaths:
    - /spec/template/spec/containers/0/image
  # inverted control: matched resources declare their own keeper paths via
  # `random.krm.kubed.io/keepers.fieldpaths`. Random falls back to the
  # annotation when the keeper has no explicit fieldPaths.
  - kind: ExternalSecret
    matchLabels:
      app: drupal
  # no fieldPaths and no annotation -> whole resource (annotations stripped)
  - kind: ConfigMap
    name: site-.*
  targets:
  - kind: Job
    fieldPath: /metadata/name
    options:
      delimiter: '-'
      index: 2

See examples/random and docs/transformers/random.md.