[Bug 2027857] Re: package initramfs-tools 0.142ubuntu2 failed to install/upgrade due to boot zpool space consumption (snapshots)

[Benjamin Drung]

Thank you for taking the time to report this bug and helping to make
Ubuntu better. Your df log says:

Filesystem                         1K-blocks     Used  Available Use% Mounted on
rpool/ROOT/ubuntu_jrhcdu            52991360 13630720   39360640  26% /
bpool/BOOT/ubuntu_jrhcdu              594304   594048        256 100% /boot

That are only 580 MiB for the /boot partition.

I did a test installation of ubuntu-22.04.2-desktop-amd64.iso in a VM
with a 20 GiB disk. I left everything as default except selecting to use
ZFS. That resulted in:

Filesystem                   1K-blocks    Used Available Use% Mounted on
rpool/ROOT/ubuntu_0uy6cf      15004928 4374912  10630016  30% /
bpool/BOOT/ubuntu_0uy6cf        851200  285184    566016  34% /boot

So 831 MiB is still less than 1 GiB. Re-assigning to the installer.

** Package changed: initramfs-tools (Ubuntu) => ubiquity (Ubuntu)

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Title:
  package initramfs-tools 0.142ubuntu2 failed to install/upgrade due to
  boot zpool space consumption (snapshots)

Status in ubiquity package in Ubuntu:
  New

Bug description:
  Using ZFS on Ubuntu, configured with the default options for bpool in
  the installer for (I think 22.04) the kernel upgrade process often
  seems to fail building initrd due to running out of space. This is due
  to zfs snapshots.

  I'm not sure this is a bug in itself, however I think it is a problem
  that the process fails quite regularly with this configuration which
  does seem like something that could be handled better to avoid this
  situation.

  I do think the installer should create a larger bpool and I would do
  that manually if I re-installed. Only allocating ~2G given the size of
  modern drives seems much too small to me.

  No LSB modules are available.
  Description:	Ubuntu 23.04
  Release:	23.04

  initramfs-tools:
    Installed: 0.142ubuntu2
    Candidate: 0.142ubuntu2
    Version table:
   *** 0.142ubuntu2 500
          500 http://gb.archive.ubuntu.com/ubuntu lunar/main amd64 Packages
          500 http://gb.archive.ubuntu.com/ubuntu lunar/main i386 Packages
          100 /var/lib/dpkg/status

  ProblemType: Package
  DistroRelease: Ubuntu 23.04
  Package: initramfs-tools 0.142ubuntu2
  ProcVersionSignature: Ubuntu 6.2.0-24.24-generic 6.2.12
  Uname: Linux 6.2.0-24-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia zfs zunicode zavl icp zcommon znvpair
  ApportVersion: 2.26.1-0ubuntu2
  Architecture: amd64
  CasperMD5CheckResult: pass
  Date: Sat Jul 15 15:20:21 2023
  ErrorMessage: installed initramfs-tools package post-installation script subprocess returned error exit status 1
  InstallationDate: Installed on 2022-12-23 (204 days ago)
  InstallationMedia: Ubuntu 22.04.1 LTS "Jammy Jellyfish" - Release amd64 (20220809.1)
  PackageArchitecture: all
  Python3Details: /usr/bin/python3.11, Python 3.11.2, python3-minimal, 3.11.2-1
  PythonDetails: N/A
  RebootRequiredPkgs: Error: path contained symlinks.
  RelatedPackageVersions:
   dpkg 1.21.21ubuntu1
   apt  2.6.0
  SourcePackage: initramfs-tools
  Title: package initramfs-tools 0.142ubuntu2 failed to install/upgrade: installed initramfs-tools package post-installation script subprocess returned error exit status 1
  UpgradeStatus: Upgraded to lunar on 2023-06-24 (21 days ago)

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