@Sunile ManjeeEven if you were to use NiFi's file based authorizer instead of Ranger the same limitation exists with maintaining authorizations when moving templates from one NiFi environment to another. Templates were never intended or designed to be the answer to the SDLC. Although they represent the closest thing to it for now.
Templates are nothing more the a snippet of a NiFi components that can be reused within the same NiFi or downloaded and shared with user of other NiFi instances. They cannot be hardcoded to use specific component uuids nor would be want to because that what hinder there reusability within the same NiFi instance. We also can't include any authorizations with a template since there is no way of knowing that other NiFi instances in which the template is loaded will contain the same set of users. Nor can we set authorizations based on PG names. What if another PG is created with that same name in another process group? What is a user happens to use a PG name that has policies associated to it? The results could present a security issue.
There is on going work towards a better SDLC model with NIFi.
That being said, the default behavior when adding a template to a graph is that all components inherit the policies from the parent process group. So if at the root level you create several process groups with a specific set of authorizations for each, instantiating your templates in a given process group will establish a controlled set of authorizations. Not the ideal solution, but helps some until future work is done to make SDLC better.
Thanks,
Matt
