Rundeck is a java web app, using (by default) embeddable database or file system for configuration and data (you could use mainstream databases, but I never nee

Rundeck is a java web app, using (by default) embeddable database or file system for configuration and data (you could use mainstream databases, but I never needed that). Regarding "Connection to the main database" as far as my use case is, all the settings could live in the file system json files or sqlite if that makes installation trivial for the use case of being very good job scheduler with options to create great jobs UI, logs and management of small number of users (which is a fairly common scenario).