[Bug 1898778] Re: RPCNFSDARGS missing from /etc/default/nfs-kernel-server

[Christian Ehrhardt ]

@Foundations-Team
I don't yet know why this was in my inbox today :-) But I hope this initial triage run helps to consider this bug accordingly.

** Bug watch added: Debian Bug tracker #917706
   https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=917706

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Title:
  RPCNFSDARGS missing from /etc/default/nfs-kernel-server

Status in nfs-utils package in Ubuntu:
  Triaged

Bug description:
  The tl;dr: version:

  An RPCNFSARGS variable needs to be added to /etc/default/nfs-kernel-
  server file in order to facilitate turning off NFSv3, so that the
  rpcbind dependency goes away. Otherwise the user is forced to snoop
  through all the related systemd service files (as I did) in order to
  figure out how to turn off NFSv3.   Meanwhile, this does appear in
  /etc/default/nfs-kernel-server, but doesn't seem to be used anywhere
  in the systemd service file chain for nfsd:

    # Runtime priority of server (see nice(1))
    RPCNFSDPRIORITY=0

  I'll just repost what I wrote to the NFS developers list about this:

  The service file for the nfs server, /usr/lib/systemd/system/nfs-
  config.service

  includes this:

    Wants=nfs-config.service
    After=nfs-config.service

  All nfs-config does is run this script:

    ExecStart=/usr/lib/systemd/scripts/nfs-utils_env.sh

  and the script reads the /etc/default/nfs* files and then

    echo RPCNFSDARGS=\"$RPCNFSDOPTS ${RPCNFSDCOUNT:-8}\"

  which then goes on the command line in the nfs-server service file:

    ExecStart=/usr/sbin/rpc.nfsd $RPCNFSDARGS

  So the solution is to add this line to /etc/default/nfs-kernel-server:

    RPCNFSDOPTS="-N 2 -N 3"

  Still unaccounted for is this variable in /etc/default/nfs-kernel-
  server:

    # Runtime priority of server (see nice(1))
    RPCNFSDPRIORITY=0

  Which I can't find used anywhere in the service files.  But in any
  case, adding the RPCNFSDOPTS variable resolved the issue:

  root at helios:~# cat /proc/fs/nfsd/versions
  -2 -3 +4 +4.1 +4.2

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