[Bug 1875045] Re: Ubiquity 20.04 exports existing ZFS pools

[Jean-Baptiste Lallement]

I'm working on a patch to only unmount pools that we've mounted as part
of the installation to prevent unmounting pools that don't belong to us.

Regarding your other issue, it is possible that using /dev/sdX for vdev
causes it. Depending on the type of block device these names are not
stable and may change on boot or when udev runs. It's more reliable to
use /dev/disk/by-uuid or /dev/disk/by-partuuid which are persistent.

** Changed in: ubiquity (Ubuntu)
       Status: Triaged => In Progress

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https://bugs.launchpad.net/bugs/1875045

Title:
  Ubiquity 20.04 exports existing ZFS pools

Status in ubiquity package in Ubuntu:
  In Progress

Bug description:
  For unclear reasons (18.04 didn't have this issue), Ubiquity on 20.04
  exports existing ZFS pools, (very) shortly after execution.

  To repeat (assumes a `/dev/sda` disk):

  - start a 20.04 Ubuntu Desktop live media
  - open a terminal
  - create a zfs pool: `zpool create test /dev/sda`
  - verify that it's been created: `zpool list`
  - launch ubiquity: `ubiquity`
  - open a separate terminal
  - list the ZFS pools: `zpool list`

  no pools are now listed.

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: ubiquity 20.04.15
  ProcVersionSignature: Ubuntu 5.4.0-26.30-generic 5.4.30
  Uname: Linux 5.4.0-26-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  ApportVersion: 2.20.11-0ubuntu27
  Architecture: amd64
  CasperMD5CheckMismatches: ./casper/vmlinuz
  CasperMD5CheckResult: skip
  CasperVersion: 1.445
  CurrentDesktop: MATE
  Date: Sat Apr 25 15:21:25 2020
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu-mate.seed quiet splash ---
  LiveMediaBuild: Ubuntu-MATE 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=C.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubiquity
  UpgradeStatus: No upgrade log present (probably fresh install)

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