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

[Christian Ehrhardt ]

After confirming the issue and checking some of the code/background.

The .default file is part of the Debian packaging and there is no e.g. example file provided by upstream source to copy from. So it seems to me packaging and upstream got out of sync on this.
- RPCNFSDPRIORITY was always Debian/Ubuntu only but the .service is from upstream
- RPCNFSDOPTS/RPCNFSDARG was added by upstream on the .service, but never got into debian/nfs-kernel-server.default


A fix might IMHO look like:
https://git.launchpad.net/~paelzer/ubuntu/+source/nfs-utils/commit/?id=9266408ab22b88aa00aabd565733afe3799f81b9
https://git.launchpad.net/~paelzer/ubuntu/+source/nfs-utils/commit/?id=837c9b38b347994df7cab4ef482596abce4d5428
https://git.launchpad.net/~paelzer/ubuntu/+source/nfs-utils/commit/?id=07babeb94f8830de550c3147346023e872e406d6

As pushed to https://code.launchpad.net/~paelzer/ubuntu/+source/nfs-
utils/+git/nfs-utils/+ref/lp-1898778-opt-parsing

But as I said this isn't my home turf, I need to discuss this with some
people and the Debian maintainers. I mean from my naive POV why not go
for 2.x but OTOH that might have massive complexities and implications
...

** Changed in: nfs-utils (Ubuntu)
       Status: New => Triaged

** Changed in: nfs-utils (Ubuntu)
   Importance: Undecided => Medium

** Tags added: server-triage-discuss

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https://bugs.launchpad.net/bugs/1898778

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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