I am running geonetwork 3.0 on tomcat. I want to put all configuration files to an external directory that is not affected by geonetwork undeploys or upgrades.

I started with this description but the entire process seems to be somewhat complex. Isn't there an easier way like copying the config files to an external dir and changing the directory link e.g. by setting a parameter in context.xml?

Or maybe I just didn't understand the workflow completely.