Public bug reported:
## 1. Symptoms, `update-grub` fails with "no such pool"
### output
benjamin@x250:~$ sudo update-grub
Sourcing file `/etc/default/grub'
Sourcing file `/etc/default/grub.d/init-select.cfg'
Generating grub configuration file ...
cannot open 'This': no such pool
### debug output
benjamin@x250:~$ sudo update-grub
Sourcing file `/etc/default/grub'
Sourcing file `/etc/default/grub.d/init-select.cfg'
Generating grub configuration file ...
+ set -u
+ which zfs
+
+ imported_pools=
+ mktemp -d /tmp/zfsmnt.XXXXXX
+ MNTDIR=/tmp/zfsmnt.bunqET
+ mktemp -d /tmp/zfstmp.XXXXXX
+ ZFSTMP=/tmp/zfstmp.X21h0R
+ RC=0
+ trap on_exit EXIT INT QUIT ABRT PIPE TERM
+ GRUB_LINUX_ZFS_TEST=
+ import_pools
+ zpool list
+ awk {if (NR>1) print $1}
+ local initial_pools=x250
+ local all_pools=
+ local imported_pools=
+ zpool import -f -a -o cachefile=none -N
+ imported_pools=This pool uses the following feature(s) not supported
by this system:
com.delphix:spacemap_v2 (Space maps representing large segments
are more efficient.)
org.zfsonlinux:project_quota (space/object accounting based on
project ID.)
All unsupported features are only required for writing to the pool.
The pool can be imported using '-o readonly=on'.
This pool uses the following feature(s) not supported by this system:
com.delphix:spacemap_v2 (Space maps representing large segments
are more efficient.)
All unsupported features are only required for writing to the pool.
The pool can be imported using '-o readonly=on'.
+ on_exit
+ zpool export This
cannot open 'This': no such pool
## 2. Cause
Only the stderr of `zpool import -f -a -o cachefile=none -N` is sent to
/dev/null so when the
command outputs on stdout everything ends up in the `imported_pools`
variable
## 3. Quick fix
in /etc/grub.d/10_linux_zfs:67, replace:
zpool import -f -a -o cachefile=none -N 2>/dev/null
by
zpool import -f -a -o cachefile=none -N >/dev/null 2>&1
ProblemType: Bug
DistroRelease: Ubuntu 19.10
Package: grub-common 2.04-1ubuntu12
ProcVersionSignature: Ubuntu 5.3.0-19.20-generic 5.3.1
Uname: Linux 5.3.0-19-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu8
Architecture: amd64
CurrentDesktop: XFCE
Date: Sat Oct 26 17:17:20 2019
SourcePackage: grub2
UpgradeStatus: Upgraded to eoan on 2019-10-26 (0 days ago)
modified.conffile..etc.grub.d.10_linux_zfs: [modified]
mtime.conffile..etc.grub.d.10_linux_zfs: 2019-10-26T17:14:38.665289
** Affects: grub2 (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug eoan
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https://bugs.launchpad.net/bugs/1850002
Title:
/etc/grub.d/10_linux_zfs fail when zpool import output to stdout
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