Did you know  45Drives offers free  public and private  webinars ? Click here to learn more  & register! Build & Price

KB450415 – NFS Mounting with Incorrect File Ownership

You are here:

Scope/Description

  • This article will cover resolving an issue when mounting NFS shares that are not honoring the permissions when mounted on a NFS client.

Prerequisites

  • Storinator or Cluster with a configured storage pool
  • SSH access to the server or cluster
  • Configured and accessible NFS share(s)

Diagnosis

  • On the NFS client we can see the issue with the ownership by running a ls -al on the mounted directory. There will also be error messages located in /var/log/messages.

 

  • To diagnose this issue, on the client, run the following command:
cat /var/log/messages | grep nss_getpwnam

The output from this command should be something similar to:
nfsidmap[11441]: nss_getpwnam: name ‘user@exampledomain.com’ does not map into domain ‘localdomain’

This tells us there is an issue with the NFS share not mapping the proper domain credentials when mounted.

Resolution

  • To resolve this issue, we need to modify the /etc/idmapd.conf file with the proper domain(FQDN). This change needs to be made on both the client and the server.

  • We need to change the #Domain variable to:

Be sure to uncomment(remove the #) before Domain.

  • From here, we need to restart the idmap service and clear the cache.

  • Restart the service

systemctl restart nfs-idmapd.service

Clear the cache

nfsidmap -c

Remount the share

mount -o remount /nfs/mount/point

 

Verification

Running a ls -al command should now list the shared files with the proper ownership users and groups.

Was this article helpful?
Dislike 0
Views: 35
Unboxing Racking Storage Drives Cable Setup Power UPS Sizing Remote Access