Public bug reported: Note: the analysis was done with an AI assistant (Claude). I reviewed this report, and every claim is backed by the attached logs and package contents. Happy to answer questions or test fixes.
On a 24.04 system with the installer's encrypted ZFS root (LUKS keystore), do-release-upgrade to 26.04.1 died: right after a routine daemon-reload, PID 1 stopped every encrypted ZFS mount and everything depending on them (all sessions including the upgrader's, journald, gdm). /var/lib/dpkg and /var/lib/apt are separate datasets and stayed unmounted, so the package database was lost (recovered from ZFS snapshots). Cause: noble's Ubuntu shell zfs-mount-generator (2.2.2-0ubuntu9.5) binds mounts to zfs-load-key-rpool.service. resolute's zfsutils-linux 2.4.1-1ubuntu5.1 ships the upstream C generator (an ELF binary), which binds them to [email protected], even though debian/changelog lists ubuntu/0002-Revert-etc-systemd-zfs-mount-generator-rewrite-in-C.patch. After the first reload following the unpack, 16 of 17 mounts (including /) have After=+BindsTo= a never-started unit, so systemd stops them. To verify, run both generators against the same /etc/zfs/zfs-list.cache (attached: generator-output-diff.txt). Timeline (CET): 18:33:53 zfsutils-linux 2.2.2 -> 2.4.1-1ubuntu5.1 unpacked 18:34:44 tpm-udev postinst: systemctl daemon-reload (the first reload after that) 18:34:45 "-.mount: Failed to enqueue stop job", then every ZFS mount and dependent unit is stopped; the journal ends Affects: in-place upgrades of encrypted ZFS roots (unencrypted pools and fresh installs are not affected). Note that switching back to the shell generator in an SRU would hit resolute-installed systems with the reverse rename, so the fix needs a transition. Untested workaround: mask the generator (ln -s /dev/null /etc/systemd/system-generators/zfs-mount-generator) during the upgrade, then remove the mask before rebooting. Related: LP: #1958142. Attachments are redacted. ** Affects: ubuntu-release-upgrader (Ubuntu) Importance: Undecided Status: New ** Affects: zfs-linux (Ubuntu) Importance: Undecided Status: New ** Tags: dist-upgrade noble2resolute resolute ** Attachment added: "generator-comparison.txt" https://bugs.launchpad.net/bugs/2172540/+attachment/6013461/+files/generator-comparison.txt ** Attachment removed: "generator-comparison.txt" https://bugs.launchpad.net/ubuntu/+source/zfs-linux/+bug/2172540/+attachment/6013461/+files/generator-comparison.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2172540 Title: noble→resolute upgrade on encrypted ZFS root: renamed zfs-load-key unit makes daemon-reload stop all mounts and kill the upgrade To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/2172540/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
