[Bug 1970257] Re: GRUB error on RHEL 8.5 with custom partitioning

[Heather Lemon]

This is a problem in packer-maas, will make a new PR there. Thanks!

** Changed in: curtin
       Status: New => Invalid

** Changed in: maas
       Status: Incomplete => Invalid

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https://bugs.launchpad.net/bugs/1970257

Title:
  GRUB error on RHEL 8.5 with custom partitioning

Status in curtin:
  Invalid
Status in MAAS:
  Invalid

Bug description:
  I've got an issue where a client is deploying a RHEL 8.5 instance with
  custom partitioning. After provisioning, the instance won't boot.

  We ran through the exercise of manually booting from GRUB, which
  worked.

  Followup investigation reveals the error; GRUB calls
  ($root)/boot/vmlinuz|initrd..., however rather than containing the
  /boot folder, $root is the partition which would mount on /boot.

  Layout is defined in MAAS > Machine > storage, and is structured like:
  sdb-part1     511.7MB   fat32   /boot/efi
  sdb-part2     1.99GB      xfs       /boot
  vg00-lvhome   .....
  ...
  ....
  vg00-root       14.99GB   xfs     /
  ...

  Image was created with default packer-maas settings, using the latest commit (fcc4d5c):
  cd packer-maas/rhel8;
  sudo -Es CHECKPOINT_DISABLE=1 PACKER_LOG=1 packer build -on-error=abort -force -var 'rhel8_iso_path=/home/maasuser/iso/rhel8.iso' rhel8.json

  Issue has been independently reproduced twice outside the client's environment.
  I've attached install logs from my local reproducer (less complicated than the client's environment), but don't think they reveal anything.

  Best regards,
  ~ Nate

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