Requirements:
I need to have a working backup of the complete System, what in case of catastrophe I will be able to easily reinstall in another server.
I'm not sure what's the best practice to backup this particular system, but for the time being I'll just do an old fashion file backup (I'll backup the /opt/idempiere/ folder) and then will backup the database.
Will create a script to automate this an offload offline to a NAS Server.
The next task (which is probably as critical as the backup itself, and were most backups fail) is to try to restore this on a new server and verify if it's able to run. Will post the update...