Comment 12 for bug 1958230

Reviewed: https://review.opendev.org/c/openstack/tripleo-common/+/838804
Committed: https://opendev.org/openstack/tripleo-common/commit/2bd026b72f46887282840d98d740a04ffb52c1b3
Submitter: "Zuul (22348)"
Branch: stable/wallaby

commit 2bd026b72f46887282840d98d740a04ffb52c1b3
Author: Steve Baker <email address hidden>
Date: Tue Jan 25 13:12:25 2022 +1300

    Switch from grub2 to bootloader element for overcloud-full

    A lot of effort has gone into the bootloader element doing the right
    thing in all cases, managing the transition to BLS, and handling
    legacy boot with UEFI boot.

    overcloud-full and other partition images have not received the
    benefit of this work because they use the much simpler grub2 element.
    Now that overcloud-hardened-uefi-full is the default, overcloud-full
    may become harder to support over time. Switching to the bootloader
    element will reduce the support matrix for the boot handling of this
    image.

    This changes fixes an issue where the kernel args root option is
    incorrect, because the bootloader element does a full kernel options
    regeneration.

    Depends-On: https://review.opendev.org/c/openstack/diskimage-builder/+/826976
    Closes-Bug: #1958230
    Change-Id: I9a0936c415485166962194104c7c54ee520e9516
    (cherry picked from commit 29324699829354575e58ea2bac37165943acd6f1)