[Bug 1510137] Re: Cannot start nfs server, get errors about "nfsd" filesystem being unknown

[Steve Langasek]

>(1) The Wily installer has bugs that occur when you install to /dev/sdb1, resulting in kernels not
> being setup properly,
>OR
>(2) If the Wily installer sees any kernels, it doesn't install the latest one.

Neither of these things are true.  However, if you are installing over
an existing install and did not format the partition where your /boot
directory is located, the kernel configuration logic *will* configure
the bootloader to use the kernel available there that has the highest
version number.  If you have a non-Ubuntu kernel with a later version
number, that will be configured as the default boot option.  And that
non-Ubuntu kernel may not have been configured in the way Ubuntu
services expect.

You will want to remove any unowned /boot/vmlinuz-* files from your
system along with the corresponding /boot/initrd.img- files and run
'sudo update-grub'; or you may wish to simply reinstall with a clean
format.

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

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https://bugs.launchpad.net/bugs/1510137

Title:
  Cannot start nfs server, get errors about "nfsd" filesystem being
  unknown

Status in nfs-utils package in Ubuntu:
  Invalid

Bug description:
  When I installed this 15.10 system (clean install), I selected that I
  wanted to install an NFS server, so it should have had all of the
  packages installed, and it should have been a simple matter of editing
  /etc/exports and restarting the service, but not only was nfs-kernel-
  server NOT installed, but after installing, I can't get it to start.

  First, I get this:
  # service nfs-kernel-server restart
  A dependency job for nfs-server.service failed. See 'journalctl -xe' for details.

  So I do 'journalctl -xe', and I see stuff about missing dependencies.
  Initially, I got errors about "nfsd" being an unknown filesystem, and
  Googling that didn't get me terribly far.  Here's the meat of what I
  see:

  Oct 26 10:48:17 thing1 systemd[1]: nfs-idmapd.service: Job nfs-idmapd.service/start failed with result 'dependency'.
  Oct 26 10:48:17 thing1 systemd[1]: run-rpc_pipefs.mount: Unit entered failed state.
  Oct 26 10:48:17 thing1 mount[1587]: mount: unknown filesystem type 'nfsd'
  Oct 26 10:48:17 thing1 systemd[1]: proc-fs-nfsd.mount: Mount process exited, code=exited status=32
  Oct 26 10:48:17 thing1 systemd[1]: Failed to mount NFSD configuration filesystem.

  I did an apt-get update and upgrade, and then I got an error about
  nfs-common having an error while being configured, so I tried to
  configure it with "sudo dpkg --configure -a", and I get errors about
  both nfs-common and nfs-kernel-server not being configured.
  Configuring nfs-common again, I'm told once again to look at
  'journalctl -xe', and the main errors I see are all about unmet
  dependencies and this one:

  Oct 26 10:38:32 thing1 mount[5635]: mount: unknown filesystem type 'rpc_pipefs'
  Oct 26 10:38:32 thing1 systemd[1]: run-rpc_pipefs.mount: Mount process exited, code=exited status=32
  Oct 26 10:38:32 thing1 systemd[1]: Failed to mount RPC Pipe File System.

  Googling this, someone suggested a reboot, so I did that, but all that
  happened was that the "nfsd" error game back.

  Note that in no instructions I've seen is mentioned to do anything
  with "nfsd", nor do I know of any place that it is specified.  It
  appears that 15.10 nfs support is pretty badly broken.  I would mark
  this bug as CRITICAL since it's taken me out of commission completely.

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