zfs-linux (0.6.5.6-2) unstable; urgency=medium
...
* Scrub all healthy pools monthly from Richard Laager
So Debian stretch, but not Ubuntu 16.04.
Deleting the file should be safe, as dpkg should retain that. It sounds
like you never deleted it, as you didn’t have it before this upgrade. So
it wasn’t an issue of the file coming back, just appearing for the first
time. Deleting and editing conffiles is a standard thing in Debian
systems.
These days, we may want to convert this to a system timer/service pair
instead, which you could then disable/mask if you don’t want. Of course,
the initial conversion will cause the same complaint you have here:
something changed on upgrade and enabled a job you don’t want.
** Changed in: zfs-linux (Ubuntu)
Status: New => Invalid
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https://bugs.launchpad.net/bugs/1860228
Title:
addition of zfsutils-linux scrib every 2nd sunday
Status in zfs-linux package in Ubuntu:
Invalid
Bug description:
FULL REF: https://github.com/zfsonlinux/zfs/issues/9858 (initially
submitted there mistakenly)
==System information==
{{{
Type Version/Name
Distribution Name Ubuntu
Distribution Version 18.04.3 LTS
Linux Kernel 4.15.0-73-generic
Architecture x86_64
ZFS Version 0.7.5-1ubuntu16.6
SPL Version 0.7.5-1ubuntu2
Describe the problem you're observing
}}}
==When did this file get added into zfsonlinux ecosystem?==
{{{
# cat /etc/cron.d/zfsutils-linux
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
# Scrub the second Sunday of every month.
24 0 8-14 * * root [ $(date +\%w) -eq 0 ] && [ -x /usr/lib/zfs-linux/scrub ]
&& /usr/lib/zfs-linux/scrub
}}}
I've been a ZoL user for many years now, and have had my own cron setup
tailored to distribute pool scrubs once per month, spread across the month to
avoid system I/O overload on any one day of the month, like this:
{{{
# zfsmain scrub: 2:30AM 7th of every month
30 02 7 * * /sbin/zpool scrub zfsmain
# zstorage scrub: 2:30AM 5th of every month
30 02 5 * * /sbin/zpool scrub zstorage
# zmedia scrub: 1:00AM 14th of every month
00 01 14 * * /sbin/zpool scrub zmedia
# zstorage scrub: 2:30AM 21st of every month
30 02 21 * * /sbin/zpool scrub ztank
}}}
However suddenly I noticed in an adhoc check of zpool status that ALL my
pools were scrubbed on Sunday January 12th 2020!
{{{
# zpool status | grep -i "scrub"
scan: scrub repaired 0B in 0h13m with 0 errors on Sun Jan 12 00:37:31 2020
scan: scrub repaired 0B in 11h24m with 0 errors on Tue Jan 14 12:24:33 2020
<-- (one of my own since the Jan12 mega scrub)
scan: scrub repaired 0B in 0h45m with 0 errors on Sun Jan 12 01:09:40 2020
scan: scrub repaired 0B in 7h10m with 0 errors on Sun Jan 12 07:34:11 2020
}}}
this is NOT what I had configured, so I went digging and found that zfsutil
cron file :(
{{{
# cat /usr/lib/zfs-linux/scrub
#!/bin/sh -eu
# Scrub all healthy pools.
zpool list -H -o health,name 2>&1 | \
awk 'BEGIN {FS="\t"} {if ($1 ~ /^ONLINE/) print $2}' | \
while read pool
do
zpool scrub "$pool"
done
# cat /etc/cron.d/zfsutils-linux
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
# Scrub the second Sunday of every month.
24 0 8-14 * * root [ $(date +\%w) -eq 0 ] && [ -x /usr/lib/zfs-linux/scrub ]
&& /usr/lib/zfs-linux/scrub
}}}
This MAY be a desirable default for some system admins, but having it
suddenly appear IMO is at the same time undesirable for many.
==Describe how to reproduce the problem==
* Having been a ZoL user sys admin for many years.
* Be a decent sys admin and know the basics, you've configured your own
cron/schedule for pool scrubbing per guidelines and individual needs.
* Follow stable upgrade channels. (for me this is Ubuntu LTS 16.04, then
18.04)
* Suddenly after some upgrade version XX(?) your pools start scrubbing on the
2nd Sunday of every month without your having configured it or asked for that.
==Expectations==
Hoping we can:
1. Confirm when and why this was rolled out to all systems by default (does
the explanation make sense? is it really OK to do this? how was it
communicated?)
2. Ensure "how to disable" is documented and supported (i.e. if I just
delete that cron file, will some future upgrade replace and re-enable it?)
----
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: zfsutils-linux 0.7.5-1ubuntu16.7
ProcVersionSignature: Ubuntu 4.15.0-73.82-generic 4.15.18
Uname: Linux 4.15.0-73-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.9-0ubuntu7.10
Architecture: amd64
Date: Sat Jan 18 13:41:29 2020
InstallationDate: Installed on 2015-06-28 (1664 days ago)
InstallationMedia: Ubuntu-Server 14.04.2 LTS "Trusty Tahr" - Release amd64
(20150218.1)
SourcePackage: zfs-linux
UpgradeStatus: Upgraded to bionic on 2019-05-10 (253 days ago)
modified.conffile..etc.sudoers.d.zfs: [inaccessible: [Errno 13] Permission
denied: '/etc/sudoers.d/zfs']
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