I could not stop thinking of the NFS problems that arose while moving the home directory out of the Xen server, so I googled, tried something and restarted services and machines countless times.
Turns out that it is a bad idea to mix host and wildcard declarations on shares in /etc/exports, as the damn thing internally still does not cope with this case …
I am not willing to blog anymore about his and will try to use unionfs next time to set up diskless nodes …
Me is off to frag his brains out …