[Bug 1616123] Re: rpc-svcgssd.service uses incorrrect variable SVCGSSDARGS

[Brian Murray]

Hello Jochen, or anyone else affected,

Accepted nfs-utils into cosmic-proposed. The package will build now and
be available at https://launchpad.net/ubuntu/+source/nfs-
utils/1:1.3.4-2.2ubuntu3.2 in a few hours, and then in the -proposed
repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.  Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested and change the tag from
verification-needed-cosmic to verification-done-cosmic. If it does not
fix the bug for you, please add a comment stating that, and change the
tag to verification-failed-cosmic. In either case, without details of
your testing we will not be able to proceed.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance for helping!

N.B. The updated package will be released to -updates after the bug(s)
fixed by this package have been verified and the package has been in
-proposed for a minimum of 7 days.

** Changed in: nfs-utils (Ubuntu Cosmic)
       Status: In Progress => Fix Committed

** Tags added: verification-needed verification-needed-cosmic

** Changed in: nfs-utils (Ubuntu Bionic)
       Status: In Progress => Fix Committed

** Tags added: verification-needed-bionic

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https://bugs.launchpad.net/bugs/1616123

Title:
  rpc-svcgssd.service uses incorrrect variable SVCGSSDARGS

Status in nfs-utils package in Ubuntu:
  Fix Released
Status in nfs-utils source package in Xenial:
  Fix Committed
Status in nfs-utils source package in Bionic:
  Fix Committed
Status in nfs-utils source package in Cosmic:
  Fix Committed
Status in nfs-utils package in Debian:
  Fix Committed

Bug description:
  [Impact]
  Command line options set for rpc.svcgssd in the /etc/default/nfs-kernel-server file are not passed on to the service, being ignored.

  [Test Case]
  * In a VM (LXD won't work), install nfs-server and a kerberos server. Use "EXAMPLE.LOCAL" for the realm, and "localhost" for the servers, when prompted:
  sudo apt install nfs-server krb5-kdc krb5-user krb5-admin-server

  * create the EXAMPLE.LOCAL realm. Use any password you want for the database master key, it won't be requested again:
  sudo krb5_newrealm

  * create a principal for the nfs service:
  sudo kadmin.local -q "addprinc -randkey nfs/$(hostname -f)"

  * extract the key into the system wide keytab:
  sudo kadmin.local -q "ktadd -k /etc/krb5.keytab nfs/$(hostname -f)"

  * edit /etc/default/nfs-common and enable gssd:
  NEED_GSSD=y

  * edit /etc/default/nfs-kernel-server and add an option to RPCSVCGSSDOPTS:
  RPCSVCGSSDOPTS="-v"

  * restart nfs-server
  sudo systemctl restart nfs-server

  * on xenial, you also have to restart nfs-config:
  sudo systemctl restart nfs-config

  * verify if /run/sysconfig/nfs-utils has the option we added above:
  $ cat /run/sysconfig/nfs-utils
  PIPEFS_MOUNTPOINT=/run/rpc_pipefs
  RPCNFSDARGS=" 8"
  RPCMOUNTDARGS="--manage-gids"
  STATDARGS=""
  RPCSVCGSSDARGS="-v"

  * Verify the running rpc.gssd process. Without the fix, it won't have the "-v" option:
  ps axw|grep svcgssd|grep -v grep
   4285 ? Ss 0:00 /usr/sbin/rpc.svcgssd

  With the fix, right after installing the udpated packages, the option we added to /etc/default/nfs-kernel-server will show up:
  ps axw|grep svcgssd|grep -v grep
   5656 ? Ss 0:00 /usr/sbin/rpc.svcgssd -v

  [Regression Potential]
  This is an old bug and whoever was affected by it probably worked around the problem by now. I tried to cope with one such scenario by not just renaming the variable we export, but exporting the correct one in addition to the old incorrect one, but that's it. I hope this, and the explanation added to the shell script wrapper nfs-utils.sh, is enough to help people with corner cases.
  idance to testers in regression-testing the SRU.

  [Other Info]
  This patch was accepted in debian: https://salsa.debian.org/debian/nfs-utils/merge_requests/2

  [Original Description]
  In /etc/default/nfs-kernel-server you can specify parameters for rpc.svcgssd:

  # Options for rpc.svcgssd.
  RPCSVCGSSDOPTS="-n"

  But the variable is named incorrectly in /lib/systemd/system/rpc-
  svcgssd.service:

  ExecStart=/usr/sbin/rpc.svcgssd $SVCGSSDARGS

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