Configuring NFS 4.0

Use this procedure to configure NFS 4.0 on delegate hosts if the operating system release is 7.4. There may be a file locking defect in NFS 4.1 with RHEL/CentOS 7.4.
  1. Log in to the host as root, or as a user with superuser privileges.
  2. Determine which release is installed.
    cat /etc/redhat-release
    • If the result includes 7.4, perform the remaining steps of this procedure.
    • If the result includes 7.2 or 7.3, continue to the next procedure.
  3. Change the NFS configuration file.
    1. Open /etc/nfsmount.conf with a text editor.
    2. Locate the Defaultvers directive.
    3. Remove the number sign character (#) from the beginning of the line.
    4. Change the value from 4 to 4.0.
      The line should appear as follows:
      Defaultvers=4.0
    5. Save the file, and then close the editor.
  4. Restart the NFS server.
    systemctl restart nfs-server