diskimage-builder/diskimage_builder/elements/centos/pre-install.d/03-reset-bls-entries

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#!/bin/bash
if [ ${DIB_DEBUG_TRACE:-0} -gt 0 ]; then
set -x
fi
set -eu
set -o pipefail
if [[ ! '9-stream' =~ ${DIB_RELEASE} ]]; then
exit 0
fi
# This is a workaround for the grub issue reported upstream with
# https://bugzilla.redhat.com/show_bug.cgi?id=2032680
# This clears out and recreates the BLS entries from the upstream
# .qcow2 image in /boot/loader/entries with the current machine-id.
# This means that in the bootloader setup, grub2-mkconfig will update
# config options as required.
# All grub2-switch-to-blscfg really does is call "kernel-install" with
# the kernels installed in /lib/modules -- this is another option for
# recreating the BLS entries. You can also re-install the kernel
# packages to do this. Another option again would be just to rename
# the exsiting .conf files.
# If this is already set, grub2-switch-to-blscfg will abort
sed -i 's/GRUB_ENABLE_BLSCFG=true//' /etc/default/grub
echo "--- /etc/default/grub dump ---"
cat /etc/default/grub
# Clear out the entries that came with the qcow2 image
echo "--- Clearing BLS entries ---"
ls /boot/loader/entries/*.conf
rm /boot/loader/entries/*.conf
# This will regenerate /boot/loader/entries for the current
# machine-id. After this, grub2-mkconfig works as usual.
#
grub2-switch-to-blscfg
echo "--- Show kernels ---"
grubby --info=ALL
# Local variables:
# mode: sh
# End: