An approach to reusable stack modules

What we have seen up to now are more or less standard and mainstream Puppet documentation and usage patterns. I have surely forgotten valuable alternatives and I may have been subjective on some solutions, but they are all common and existing ones, nothing has been invented.

In this section, I'm going to discuss something that is not mainstream, has not been validated in the field, and is definitely a personal idea on a possible approach to higher abstraction modules.

It's not completely new or revolutionary, I'd rather call it evolutionary, in the line of established patterns like parameterized classes, growing usage of PuppetDB, roles and profiles, with a particular focus on reusability.

I call stack here a module that has classes with parameters, files, and templates that allow the configuration of a complete application stack, either on a single all-in-one node or on separated nodes.

It is supposed to be used by all the nodes that concur to define our...