Public bug reported: Description: Ubuntu 20.04.1 LTS Release: 20.04 grub-common: 2.04-1ubuntu26.4
I expect grub-update to create grub.cfg with Linux entries for ZFS. Instead I am left with an empty list and an unbootable OS. The output from update-grub: Sourcing file `/etc/default/grub' Sourcing file `/etc/default/grub.d/init-select.cfg' Sourcing file `/etc/default/grub.d/kdump-tools.cfg' Generating grub configuration file ... /etc/grub.d/10_linux_zfs: 404: .: Can't open /tmp/zfsmnt.stGSQC/etc/os-release Found memtest86+ image: /memtest86+.elf Found memtest86+ image: /memtest86+.bin done This is failing because I have a separate ZFS filesystem for /usr. The 10_linux_zfs script is gathering information from /etc/os-release which is a symlink to ../usr/lib/os-release. The first issue I see in 10_linux_zfs is under function get_dataset_info() at line 382: mount -o noatime,zfsutil -t zfs "${base_dataset}" "${mntdir}" Since /usr is under a separate filesystem, the symlink would be broken and the script fails. This should mount /usr as well if it is a separate filesystem. The next issue I see is when the script iterates the zsys snapshots at line 514: for snapshot_dataset in $(zfs list -H -o name -t snapshot "${dataset}"); do boot_list="${boot_list}$(get_dataset_info ${snapshot_dataset} ${mntdir})\n" done You would get a similar error message about os-release. /etc/grub.d/10_linux_zfs: 410: .: Can't open /.zfs/snapshot/autozsys_oiimb5/etc/os-release Again, the script should consider reading the /usr snapshot as well if it is a separate filesystem. ** Affects: grub2 (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1899372 Title: update-grub 10_linux_zfs fails when /usr is a separate filesystem To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1899372/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs