I started to work on nethserver-nfs, the first think I saw that it was really well integrated to nethserver-samba in Nethgui, for cockpit I think I need to clone nethserver-samba and duplicate the code. Obviously I will clean and remove all specific stuffs relative to shared folders, but I feel like Formagick way, you want to add one option to the core, you need to fork the whole code.
Well I am sad 