This bug was fixed in the package zfs-linux - 0.6.5.6-0ubuntu14
---------------
zfs-linux (0.6.5.6-0ubuntu14) xenial; urgency=medium
* Fix zfs services to fail on first boot due to zfs services starting up
before /etc/mtab has a chance to be symlinked to /proc/mounts. (LP:
#1607920)
(upstream commit 792517389fad5c495a2738b61c2e9c65dedaaa9a)
* Symlink utilities in /usr/sbin to remove suffix as per policy 10.4 Scripts
(LP: #1628279)
Users can rely on the new names, but relying on the old names won't break
before
release upgrade.
-- Eric Desrochers <eric.desroch...@canonical.com> Tue, 04 Oct 2016
15:07:52 +0200
** Changed in: zfs-linux (Ubuntu Xenial)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1607920
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:
Fix Released
Status in sysvinit source package in Xenial:
Won't Fix
Status in zfs-linux source package in Xenial:
Fix Released
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]
* The "reading" is redirected to /proc/self/mounts.
The writing to /etc/mtab. Some distros still need that. The current hope is
to replace the writing (and maybe reading) with libmount, in a second phase.
* 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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