@rlaager ref for "long time ago"? (Looking for release notes and
specific version)
I've been reasonably diligent in monitoring my pool scrub activity, I
would "guess" that maybe in the last 2-3 months I may have lost track.
But also I only upgraded from Ubuntu 16.04 LTS sometime late-2019 Fall
(iirc) - couldn't find a way to precisely determine when. -- the below
details suggest in Sept 2019.
So "LONG time ago", certainly possible, but many users might not pick
this up until an upgrade from 16.04 LTS to 18.04 LTS.
Here's the history of the package. (only have so much detail due to log
rotation)
```
/var/log/apt$ for file in $(ls -1 | grep history.log | grep gz | sort -V); do
echo "==="; echo; echo $file; ls -al $file | awk '{print $6, $7, $8}'; zgrep
zfsutils-linux $file | tr ", " "\n" | grep -A1 zfsutils-linux; done
===
history.log.1.gz
Jan 1 00:00
===
history.log.2.gz
Nov 28 06:53
===
history.log.3.gz
Oct 31 06:39
===
history.log.4.gz
Sep 30 06:20
zfsutils-linux:amd64
(0.7.5-1ubuntu16.4
===
history.log.5.gz
Aug 30 06:57
===
history.log.6.gz
Jul 31 06:27
===
history.log.7.gz
Jun 30 2019
===
history.log.8.gz
May 31 2019
===
history.log.9.gz
Apr 30 2019
===
history.log.10.gz
Mar 30 2019
zfsutils-linux:amd64
(0.6.5.6-0ubuntu25
===
history.log.11.gz
Mar 1 2019
===
history.log.12.gz
Feb 1 2019
```
The above at least definitely proves that I was previously on 0.6.5.6
(likely while on Ubuntu 16.04) - where the zfsutils-linux cron scrub was
NOT present to my knowledge -- then in Sep 2019 we jump to 0.7.5 (likely
when I upgraded the server to Ubuntu 18.04).
To be clear, I've never deleted it, nor edited it, as only this week I
uncovered the "problem".
I agree that deletion of the file may be ill-advised ... since the next time
dpkg updates it would probably to re-add it?
The suggestion to edit the file and comment out the scrub command is
likely safest, however then all future upgrades will complain about the
conflict.
It would be preferable if there was a configuration to enable/disable
it.
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to zfs-linux in Ubuntu.
https://bugs.launchpad.net/bugs/1860228
Title:
addition of zfsutils-linux scrib every 2nd sunday
Status in zfs-linux package in Ubuntu:
New
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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