[Bug 1880869] Re: Use persistent device name for vdevs

[Nicolay Doytchev]

Re: SRUing

I just got hit by this. I'm using a laptop that I added a second disk
to. That changed the root disk from /dev/sda to /dev/sdb. The rpool got
imported fine so boot succeeded. However silently bpool did not get
imported. A couple of kernel updates were done over /boot inside rpool
and were not reflected in grub. Effectively kernel became frozen at the
time when bpool failed to import. I dug through the zsys-setup file and
figured I'd add a couple of lines to convert partrpool and partbpool
from /dev/sdx to /dev/disk/by-partuuid. After I did that, I
opportunistically decided to check how the current source looks like and
I saw almost identical lines were added in
https://git.launchpad.net/ubiquity/commit/?id=36ea45160d00c9fd940b6d1b760e7a7b9b652625
by @jibel. :D

So yeah, even though this is an EXPERIMENTAL feature, it would be really
nice to avoid this gotcha.

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https://bugs.launchpad.net/bugs/1880869

Title:
  Use persistent device name for vdevs

Status in ubiquity:
  Unknown
Status in ubiquity package in Ubuntu:
  In Progress

Bug description:
  ZFS pools are currently created with device names such as /dev/sdX, /dev/vdX,... However, this name is not stable and may change on each reboot.
  "zpool create" must use persistent device names like UUID or PARTUUID instead.

  ProblemType: Bug
  DistroRelease: Ubuntu 20.10
  Package: ubiquity (not installed)
  ProcVersionSignature: Ubuntu 5.4.0-18.22-generic 5.4.24
  Uname: Linux 5.4.0-18-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  ApportVersion: 2.20.11-0ubuntu36
  Architecture: amd64
  CasperMD5CheckResult: skip
  CurrentDesktop: ubuntu:GNOME
  Date: Wed May 27 13:52:13 2020
  InstallCmdLine: file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd.lz quiet splash -- keyboard-configuration/layoutcode=fr keyboard-configuration/variantcode=oss
  InstallationDate: Installed on 2014-07-15 (2143 days ago)
  InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Alpha amd64 (20140520)
  SourcePackage: ubiquity
  UpgradeStatus: Upgraded to groovy on 2018-03-24 (794 days ago)

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