nfs export stopped working when I upgraded slave node from ubuntu 22.04 to ubuntu 24.04

[Ian A. Taylor]

I run a small cluster with one machine on internet & private network

hostnamectl
  Static hostname: spark
        Icon name: computer-server
          Chassis: server
       Machine ID: de74a40228044512959b964f1e409632
          Boot ID: 8ae6e72e279f41a5af35925637bd7bac
Operating System: Ubuntu 22.04.4 LTS
           Kernel: Linux 5.15.0-48-generic
     Architecture: x86-64

/etc/exports

/export/data       compute-0-0(rw,sync,no_subtree_check)
/export/data       compute-0-1(rw,sync,no_subtree_check)
/export/data       compute-0-2(rw,sync,no_subtree_check)
/export/data       10.1.1.252(rw,sync,no_subtree_check)

FYI 10.1.1.252 is compute-0-2

the other 3 are slave nodes on a private network

All the machines were installed as Ubuntu 22.04

I setup an nfs mount from head node and that worked fine

However I upgraded one of the slave nodes to Ubuntu 24.04

hostnamectl
  Static hostname: compute-0-2
        Icon name: computer-server
          Chassis: server 🖳
       Machine ID: ac363369938a46cca6331c3e3574bbda
          Boot ID: 5671d5f66e0a4c06b60aff9dc7558594
Operating System: Ubuntu 24.04 LTS
           Kernel: Linux 6.8.0-41-generic
     Architecture: x86-64
  Hardware Vendor: Supermicro
   Hardware Model: X11DPi-N_T_
Firmware Version: 3.3
    Firmware Date: Mon 2020-02-24
     Firmware Age: 4y 6month 3d

Now I cannot mount nfs exports

I get this message

mount spark.local:/export/data  /export/data
mount: /export/data: bad option; for several filesystems (e.g. nfs, 
cifs) you might need a /sbin/mount.<type> helper program.
        dmesg(1) may have more information after failed mount system call.


Any ideas what I am doing wrong


Thanking you

Yours sincerely


Ian Taylor
University of St.Andrews,
School of Physics & Astronomy,
North Haugh,
St.Andrews,
Fife  KY16 9SS,
Scotland.

e-Mail :- iat at st-and.ac.uk
Tel    :- (0)1334-463141
Fax    :- (0)1334-463104

The University of St Andrews
is a charity registered in
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