I don't think it's Kerberos related. The manual reproducer is a plain mount
localhost, without Kerberos.

The same simple localhost setup was working in mantic. I then dist upgraded
the VM to noble, and it started failing.

On Sun, 7 Apr 2024, 18:10 Bryce Harrington, <email address hidden>
wrote:

> Does running `mount -vvv ...` provide more information?
>
> I notice of the 3 test cases in the dep8 that it's the 2 NFSv4 w/
> kerberos ones failing, and the simple nfsv3 one passes.  Could it be
> something to do with kerberos or its configuration?  Like, could it be
> authorizing a network IP other than 127.0.0.1?
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/2060217
>
> Title:
>   NFSv4 fails to mount in noble/s390x
>
> Status in nfs-utils package in Ubuntu:
>   Triaged
>
> Bug description:
>   Just filing the bug now to keep track of it. No troubleshooting done
>   yet.
>
>   https://autopkgtest.ubuntu.com/packages/n/nfs-utils/noble/s390x
>
>   Looks like it has been failing for a long time already.
>
>   Log: https://autopkgtest.ubuntu.com/results/autopkgtest-
>   noble/noble/s390x/n/nfs-utils/20240404_145924_ef255@/log.gz
>
>   339s autopkgtest [14:41:04]: test local-server-client:
> [-----------------------
>   340s Killed
>   340s autopkgtest [14:41:05]: test process requested reboot with marker
> boot1
>   364s autopkgtest-virt-ssh: WARNING: ssh connection failed. Retrying in 3
> seconds...
>   372s FAIL: nfs_home not mounted
>   373s autopkgtest [14:41:38]: test local-server-client:
> -----------------------]
>   373s local-server-client  FAIL non-zero exit status 1
>
>
>   and
>
>
>   934s autopkgtest [14:50:59]: test kerberos-mount:
> [-----------------------
>   935s Initializing database '/var/lib/krb5kdc/principal' for realm 'DEP8',
>   935s master key name 'K/M@DEP8'
>   935s Authenticating as principal root/admin@DEP8 with password.
>   935s Principal "nfs/nfs-server.dep8@DEP8" created.
>   935s Authenticating as principal root/admin@DEP8 with password.
>   935s Entry for principal nfs/nfs-server.dep8 with kvno 2, encryption
> type aes256-cts-hmac-sha1-96 added to keytab FILE:/etc/krb5.keytab.
>   935s Entry for principal nfs/nfs-server.dep8 with kvno 2, encryption
> type aes128-cts-hmac-sha1-96 added to keytab FILE:/etc/krb5.keytab.
>   935s Authenticating as principal root/admin@DEP8 with password.
>   935s Principal "host/nfs-server.dep8@DEP8" created.
>   935s Authenticating as principal root/admin@DEP8 with password.
>   935s Entry for principal host/nfs-server.dep8 with kvno 2, encryption
> type aes256-cts-hmac-sha1-96 added to keytab FILE:/etc/krb5.keytab.
>   935s Entry for principal host/nfs-server.dep8 with kvno 2, encryption
> type aes128-cts-hmac-sha1-96 added to keytab FILE:/etc/krb5.keytab.
>   936s exporting *:/storage
>   938s mount.nfs: mount system call failed for /mnt
>   938s umount: /mnt: not mounted.
>   938s autopkgtest [14:51:02]: test kerberos-mount:
> -----------------------]
>   939s kerberos-mount       FAIL non-zero exit status 32
>
> To manage notifications about this bug go to:
>
> https://bugs.launchpad.net/ubuntu/+source/nfs-utils/+bug/2060217/+subscriptions
>
> Launchpad-Notification-Type: bug
> Launchpad-Bug: distribution=ubuntu; sourcepackage=nfs-utils;
> component=main; status=Triaged; importance=High; assignee=None;
> Launchpad-Bug-Information-Type: Public
> Launchpad-Bug-Private: no
> Launchpad-Bug-Security-Vulnerability: no
> Launchpad-Bug-Commenters: ahasenack bryce
> Launchpad-Bug-Reporter: Andreas Hasenack (ahasenack)
> Launchpad-Bug-Modifier: Bryce Harrington (bryce)
> Launchpad-Message-Rationale: Subscriber
> Launchpad-Message-For: ahasenack
>
>