[Bug 1607920] Re: zfs services fail on firstboot if zfs-utils is integrated into the deployment image

[Eric Desrochers]

I removed the Xenial debdiff attached to this bug and I will re-do it
when current zfs-linux SRU for Xenial by cking will be completed.

Until then, the Yakkety debdiff is still fine and can be sponsored.

Eric

** Patch removed: "lp1607920_xenial.debdiff"
   https://bugs.launchpad.net/ubuntu/xenial/+source/zfs-linux/+bug/1607920/+attachment/4750120/+files/lp1607920_xenial.debdiff

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Title:
  zfs services fail on firstboot if zfs-utils is integrated into the
  deployment image

Status in sysvinit package in Ubuntu:
  Won't Fix
Status in zfs-linux package in Ubuntu:
  In Progress
Status in sysvinit source package in Xenial:
  Won't Fix
Status in zfs-linux source package in Xenial:
  In Progress

Bug description:
  [Impact]

   * zfs services fail on firstboot if zfs-utils is integrated into the
  deployment image.

   * Output from systemd -
  sudo systemctl --failed
  UNIT LOAD ACTIVE SUB DESCRIPTION
  ● zfs-import-scan.service loaded failed failed Import ZFS pools by device scanning
  ● zfs-mount.service loaded failed failed Mount ZFS filesystems

   * This is particularly frustrating for users who use automated
  monitoring as it means virtual machines must always be restarted
  before showing as clean.

   * This failure is due to zfs services starting up before /etc/mtab
  has a chance to be symlinked to /proc/mounts.

  [Test Case]

   1. Grab a stock xenial image, and unpack it and add zfs-utils to it.  Repack it.
   2. Boot machine
   3. Check systemctl --failed.

  [Regression Potential]

   * none expected, patch has been intensively tested by the upsteam zfs
  test script suite.

   * This is a upstream commit merge in 0.7.0.

   * A ubuntu package has been tested (including the upstream commit) by
  a user of the community facing this bug, and confirmed it addresses
  the problem (see comment #7).

  [Other Info]

   * Upstream commit :
  https://github.com/zfsonlinux/zfs/commit/792517389fad5c495a2738b61c2e9c65dedaaa9a

   * Upstream bug: https://github.com/zfsonlinux/zfs/issues/4680

   
   * Debian bug : https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=839071

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