[Bug 2060217] Re: NFSv4 fails to mount in noble/s390x

[Bryce Harrington]

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?

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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 at DEP8'
  935s Authenticating as principal root/admin at DEP8 with password.
  935s Principal "nfs/nfs-server.dep8 at DEP8" created.
  935s Authenticating as principal root/admin at 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 at DEP8 with password.
  935s Principal "host/nfs-server.dep8 at DEP8" created.
  935s Authenticating as principal root/admin at 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

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