Public bug reported:
https://askubuntu.com/questions/1405231/unable-to-mount-nfs-on-
ubuntu-22-04
I've installed Ubuntu 22.04 on a machine and I am trying to mount an NFS
share which has no problems mounting on an array of other Linux Ubuntu
machines (21.04, 20.04, 18.04, etc.).
The command we use is:
```
sudo apt install nfs-common # Only required once for installation
sudo mount -t nfs 10.234.123.11:/bfx_share1 /bfx_share1
```
If I do a:
```
sudo showmount -e 10.234.123.11
```
It shows the list of possible mounts, so everything is kosher in that respect.
It's just stuck there, not doing anything. Any ideas? Anything I can do
or add to debug the situation? Any other clients not `nfs-common`?
I've installed `nfstrace` and while trying to mount the nfs folder, I
kicked it off in another terminal, to obtain the prompt below:
```
## On one terminal
(base) user@LS6-MS-7D04:~$ ping 10.234.123.11
PING 10.234.123.11 (10.234.123.11) 56(84) bytes of data.
64 bytes from 10.234.123.11: icmp_seq=1 ttl=64 time=0.202 ms
64 bytes from 10.234.123.11: icmp_seq=2 ttl=64 time=0.122 ms
64 bytes from 10.234.123.11: icmp_seq=3 ttl=64 time=0.172 ms
^C
--- 10.234.123.11 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2027ms
rtt min/avg/max/mdev = 0.122/0.165/0.202/0.033 ms
(base) user@LS6-MS-7D04:~$ sudo mount 10.234.123.11:/bfx_share1 /bfx_share1
## In the other terminal with nfstrace running
root@LS6-MS-7D04:/home/user# nfstrace -Z user
Log file: nfstrace.log
Read from interface: enp111s0
BPF filter : port 2049 or port 445
snapshot len: 65535 bytes
read timeout: 100 ms
buffer size : 20971520 bytes
promiscuous mode: on
capture traffic : inout
Processing packets. Press CTRL-C to quit and view results.
Detect session 10.234.123.8:902 --> 10.234.123.11:2049 [TCP]
Detect session 10.234.123.8:772 --> 10.234.123.11:2049 [TCP]
10.234.123.8:772 --> 10.234.123.11:2049 [TCP]NULL
CALL []
REPLY []
Detect session 10.234.123.8:947 --> 10.234.123.11:2049 [TCP]
10.234.123.8:947 --> 10.234.123.11:2049 [TCP]NULL
CALL []
REPLY []
```
Looking at the release notes of Ubuntu 22.04 (Jammy Jellyfish Release Notes):
https://discourse.ubuntu.com/t/jammy-jellyfish-release-notes/24668?_ga=2.137381111.630065420.1651222708-2033241278.1650531954
There is a section:
```
UDP disabled for NFS mounts
Since Ubuntu 20.10 (“Groovy Gorilla”), the kernel option
CONFIG_NFS_DISABLE_UDP_SUPPORT=y is set and this disables using UDP as the
transport for NFS mounts, regardless of NFS version.
In practice, if you try to use udp, you will get this error:
$ sudo mount f1:/storage /mnt -o udp
mount.nfs: an incorrect mount option was specified
###
NFS server
The NFS server and client packages have finally been updated to the latest
upstream version.
All NFS services now read their configuration from /etc/nfs.conf and
/etc/nfs.conf.d/*.conf, which is an INI-style configuration file, where
each section is about one daemon or aspect of the NFS service. The old
/etc/defaults/nfs-* configuration files are still left around, but are
unused.
During upgrade, a conversion script is run if the package detects that
the /etc/default/nfs-* files have been changed. This script is
/usr/share/nfs-common/nfsconvert.py and it will read the options from
/etc/defaults/nfs-* and generate /etc/nfs.conf.d/local.conf, which
overrides the defaults in /etc/nfs.conf.
If the conversion script fails for some reason, the package installation
or upgrade will fail, and the issue will have to be resolved. Please
file a bug against nfs-utils in Launchpad 2 if you encounter such a
scenario.
A new tool called nfsconf(8) can be used to query the configuration
settings of /etc/nfs.conf and /etc/nfs.conf.d/*.conf.
##
the CTDB package was adjusted to work with the new NFS server version
shipped in this Ubuntu 22.04
```
** Affects: nfs-utils (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1970898
Title:
unable to use nfs client to mount nfs in Ubuntu 22.04
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