[Bug 2008110] [NEW] Installer crashes when installing into a btrfs mirror

[Dainius 'GreatEmerald' Masiliūnas]

Public bug reported:

When attempting to install Ubuntu 22.04 into a system that has a pre-
created btrfs with drive mirroring (or multiple devices in general - the
logs here show the case when I was using merged drives without any raid
settings), Ubiquity crashes because at the bootloader installation step,
for some reason it assumes that I am running ZFS and tries to run zsys
finalize, which of course causes a crash, because I am not using ZFS. So
it seems that the installer somewhere does an assumption "multiple
devices = ZFS", which is not true. Installation succeeds on the same
system as soon as I unlink the drives (i.e. do a btrfs dev remove on one
of the drives).

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: ubiquity 22.04.17
ProcVersionSignature: Ubuntu 5.15.0-43.46-generic 5.15.39
Uname: Linux 5.15.0-43-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu82.1
Architecture: amd64
CasperMD5CheckResult: pass
CasperVersion: 1.470
Date: Wed Feb 22 16:46:23 2023
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed maybe-ubiquity quiet splash ---
LiveMediaBuild: Ubuntu 22.04.1 LTS "Jammy Jellyfish" - Release amd64 (20220809.1)
RebootRequiredPkgs: Error: path contained symlinks.
SourcePackage: grub-installer
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: grub-installer (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug jammy ubiquity-22.04.17 ubuntu

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https://bugs.launchpad.net/bugs/2008110

Title:
  Installer crashes when installing into a btrfs mirror

Status in grub-installer package in Ubuntu:
  New

Bug description:
  When attempting to install Ubuntu 22.04 into a system that has a pre-
  created btrfs with drive mirroring (or multiple devices in general -
  the logs here show the case when I was using merged drives without any
  raid settings), Ubiquity crashes because at the bootloader
  installation step, for some reason it assumes that I am running ZFS
  and tries to run zsys finalize, which of course causes a crash,
  because I am not using ZFS. So it seems that the installer somewhere
  does an assumption "multiple devices = ZFS", which is not true.
  Installation succeeds on the same system as soon as I unlink the
  drives (i.e. do a btrfs dev remove on one of the drives).

  ProblemType: Bug
  DistroRelease: Ubuntu 22.04
  Package: ubiquity 22.04.17
  ProcVersionSignature: Ubuntu 5.15.0-43.46-generic 5.15.39
  Uname: Linux 5.15.0-43-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  ApportVersion: 2.20.11-0ubuntu82.1
  Architecture: amd64
  CasperMD5CheckResult: pass
  CasperVersion: 1.470
  Date: Wed Feb 22 16:46:23 2023
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed maybe-ubiquity quiet splash ---
  LiveMediaBuild: Ubuntu 22.04.1 LTS "Jammy Jellyfish" - Release amd64 (20220809.1)
  RebootRequiredPkgs: Error: path contained symlinks.
  SourcePackage: grub-installer
  UpgradeStatus: No upgrade log present (probably fresh install)

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