I have 2 separate properties files which contain secrets. I would like to use secretGenerator and merge them into a single property (i.e. app_properties).

Here’s the code I’m using but it’s not working:

apiVersion: kustomize.config.k8s.io/v1beta1
kind: Kustomization
secretGenerator:
- name: my-secret
  files:
  - app_properties=app-default.properties
  - app_properties=app-dev.properties
generatorOptions:
  disableNameSuffixHash: true

This obviously fails with an error:

error: configmap my-secret illegally repeats the key `app_properties`

I seem to be missing something, but not sure what. Looking at the docs it does sound like I could use mergeBehavior and have the secretGenerator create two secrets (one that creates and one that merges), but that did not work as well.

Not sure if what I’m trying to do is possible and if I’m in the right direction. Any ideas?