set-annotations: Advanced Example #

Overview #

This example demonstrates how to declaratively run set-annotations function to upsert annotations to the .metadata.annotations field on all resources.

We use the following Kptfile and fn-config.yaml to configure the function.

apiVersion: kpt.dev/v1
kind: Kptfile
metadata:
  name: example
pipeline:
  mutators:
    - image: ghcr.io/kptdev/krm-functions-catalog/set-annotations:latest
      configPath: fn-config.yaml

# fn-config.yaml
apiVersion: fn.kpt.dev/v1alpha1
kind: SetAnnotations
metadata:
  name: my-func-config
annotations:
  fruit: apple
  color: orange
additionalAnnotationFields:
  - kind: MyResource
    group: dev.example.com
    version: v1
    create: true
    path: spec/selector/annotations

The desired annotations are provided using the annotations field. We have a CRD with group dev.example.com, version v1 and kind MyResource. We want the annotations to be added to field .spec.selector.annotations as well. We specify it in field additionalAnnotationFields.

Function invocation #

Invoke the function by running the following commands:

$ kpt pkg get https://github.com/kptdev/krm-functions-catalog/tree/master/examples/set-annotations-advanced
$ kpt fn render set-annotations-advanced

Expected result #

Check all resources have 2 annotations: color: orange and fruit: apple. And the resource of kind MyResource also has these 2 annotations in spec.selector.annotations.