We have an application that needs to read initialization parameters from a file. Now a configMap is used to store these as data and mounted as a volume.

However update the configMap will not trigger a rollout update of pods. So I am thinking create a custom resource that stores the parameters and create a configMap when it is created or updated and a custom controller to trigger a rollout of pods or somehow mount the custom resource as a volume.

Could anyone please point me to an example? Another question is that should I go further and define the whole app as a custom resource? This approach also has the issue of creating configMap with custom resources. Thanks.