[CentOS] NFS Client to Server User Mapping / how to configure for user-IDs

Fri Oct 16 05:27:14 UTC 2020
Ralf Prengel <ralf.prengel at rprengel.de>

we ve a central Cent7 system working as NFS server.
Everything works fine with simple configurations like one client is  
mapping  a share and several clients are mapping a share to edit one  
or more files wotling as root

The problem:
fpr a projekt we ve 4 elk-nodes sharing one share on this server to  
use the same files.
This doesn t work.
My guess is that the  reason is that elk is using an own user.
What ist the best way to solve the problem. We have no central  
user-managemnt for linux-logins.