params.yaml

params.yaml

spec:
  serviceClassName: user-provided-service
  planName: default
  parameters:
  - name: username               # easy name/value pair case
    value: root
  - name: password               # pull value from a secret's key
    valueFrom:
      secretKeyRef:
        name: mySecret1
        key: passwd
  - name: size                   # pull value from a configMap key
    valueFrom:
      configMapKeyRef:
        name: myConfigMap0
        key: length
  parametersFrom:
  - configMapRef: myConfigMap1    # pull in all the CM's key/value's   (string/string)
  - secretRef: mySecret2          # pull in all the secret key/value's (string/string)
  - configMapKeyBlobRef:
      name: myConfigMap2
      key: credentials            # "credentials" is a JSON object so we take it verbatim and we merge with the above
  - secretKeyBlobRef:
      name: mySecret3
      key: creds                  # "creds" is a JSON object so we take it verbatim and merge with the the above

This looks like a comprehensive solution for a variety of use cases, I like it.