[Bug 1973101] Re: After upgrade to 22.04 NFS exports for vers 2 and 3 no longer work

[Andreas Hasenack]

The kernel we ship has nfs udp disabled, I missed that you were running
a custom kernel. But thanks for the feedback.

I think we need to remove or add a big fat comment to the obsolete
/etc/default/nfs-* files, and I filed a bug for it:

https://bugs.launchpad.net/ubuntu/+source/nfs-utils/+bug/1973630

That being said, the upgrade process should have migrated all the
/etc/default/nfs-* options to /etc/nfs.conf.d/local.conf, which gets
merged with /etc/nfs.conf at runtime. You can see the final merged
result with nfsconf --dump. If there was a problem in migrating some
option you had, that's something we will want to fix, and would
appreciate a bug about it. But fresh installs will have /etc/nfs.conf
only, with the defaults.

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Title:
  After upgrade to 22.04 NFS exports for vers 2 and 3 no longer work

Status in nfs-utils package in Ubuntu:
  Incomplete

Bug description:
  I upgraded from 20.04 to 22.04 a server which has NFS clients that are
  version 2 (SunOS 4.1.4), version 3 (Redhat 6.2) and version 4.2 (other
  modern Linux systems).

  After upgrading the version 2 and version 3 clients no longer can
  mount the file systems.

  A check with rpcinfo -p showed version 2 no longer being advertised, I
  checked the conf and found the update had disabled it, I re-enabled
  it.

  Version 3 was still advertised, but the mount still fails, and after
  re-enabling version 2, the mount still fails.

  I am also not at all appreciative of the unauthorized changes that the
  upgrade made to my exports file.

  ProblemType: Bug
  DistroRelease: Ubuntu 22.04
  Package: nfs-kernel-server 1:2.6.1-1ubuntu1
  Uname: Linux 5.17.6 x86_64
  .etc.request-key.d.id_resolver.conf: create	id_resolver	*	*	/usr/sbin/nfsidmap -t 600 %k %d
  ApportVersion: 2.20.11-0ubuntu82
  Architecture: amd64
  CasperMD5CheckResult: unknown
  CurrentDesktop: MATE
  Date: Wed May 11 18:44:54 2022
  NFSMounts:
   
  NFSv4Mounts:
   /bu    204.122.16.128:/mail.bu nfs4   rw,relatime,vers=4.2,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,clientaddr=204.122.16.222,local_lock=none,addr=204.122.16.128
   /misc  204.122.16.12:/misc     nfs4   rw,nosuid,nodev,relatime,vers=4.2,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,clientaddr=204.122.16.222,local_lock=none,addr=204.122.16.12
   /home  204.122.16.12:/home     nfs4   rw,nosuid,nodev,relatime,vers=4.2,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,clientaddr=204.122.16.222,local_lock=none,addr=204.122.16.12
  RebootRequiredPkgs: Error: path contained symlinks.
  SourcePackage: nfs-utils
  UpgradeStatus: Upgraded to jammy on 2022-05-10 (1 days ago)

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