diskimage-builder/diskimage_builder/elements/bootloader/finalise.d/50-bootloader
Dr. Jens Harbott b774869c3b Fix grub setup on Gentoo
After some recent reordering[0], the /boot/grub directory isn't created
early enough on Gentoo any more, let us just ensure ourselves that it is
in place when we create the grub config.

[0] I8cb34914bbbfa05521bbb71cc6637368b980358f

Change-Id: I8a84d08c3090e46b00d1d626fb984f66ea33f256
2022-05-22 14:18:20 +02:00

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#!/bin/bash
# Configure grub. Note that the various conditionals here are to handle
# different distributions gracefully.
if [ ${DIB_DEBUG_TRACE:-1} -gt 0 ]; then
set -x
fi
set -eu
set -o pipefail
if [ ${DIB_EXTLINUX:-0} != "0" ]; then
echo "DIB_EXTLINUX no longer supported"
exit 1
fi
# Some distros have pre-installed grub in some other way, and want to
# skip this.
if [[ -f "/tmp/grub/install" ]]; then
exit 0
fi
BOOT_DEV=$IMAGE_BLOCK_DEVICE
# All available devices, handy for some bootloaders...
declare -A DEVICES
eval DEVICES=( $IMAGE_BLOCK_DEVICES )
DIB_BLOCK_DEVICE=${DIB_BLOCK_DEVICE:-}
# Right now we can't use pkg-map to branch by arch, so tag an
# architecture specific virtual package so we can install the
# rigth thing based on distribution.
if [[ "$ARCH" =~ "ppc" ]]; then
install-packages -m bootloader grub-ppc64
elif [[ "${DIB_BLOCK_DEVICE}" == "mbr" ||
"${DIB_BLOCK_DEVICE}" == "gpt" ]]; then
install-packages -m bootloader grub-pc
elif [[ "${DIB_BLOCK_DEVICE}" == "efi" ]]; then
install-packages -m bootloader grub-efi grub-efi-$ARCH
else
install-packages -m bootloader grub-pc grub-efi grub-efi-$ARCH
fi
GRUBNAME=$(type -p grub-install) || echo "trying grub2-install"
if [ -z "$GRUBNAME" ]; then
GRUBNAME=$(type -p grub2-install)
fi
if type grub2-mkconfig >/dev/null; then
GRUB_MKCONFIG="grub2-mkconfig"
else
GRUB_MKCONFIG="grub-mkconfig"
fi
if [[ ! $($GRUBNAME --version) =~ ' 2.' ]]; then
echo "Failure: not grub2"
exit 1
fi
# Some distros keep things in /boot/grub2, others in /boot/grub
if [ -d /boot/grub2 ]; then
GRUB_CFG=/boot/grub2/grub.cfg
GRUBENV=/boot/grub2/grubenv
else
# NOTE(ianw) This used to be behind a "-d /boot/grub" but this
# directory doesn't seem to exist for gentoo at this point;
# something creates it later. So we just fallback to this
# unconditionally.
GRUB_CFG=/boot/grub/grub.cfg
GRUBENV=/boot/grub/grubenv
mkdir -p /boot/grub
fi
# When using EFI image-based builds, particularly rhel element
# based on RHEL>=8.2 .qcow2, we might have /boot/grub2/grubenv
# as a dangling symlink to /boot/efi because we have extracted
# it from the root fs, but we didn't populate the separate EFI
# boot partition from the image. grub2-install calls rename()
# on this file, so if it's a dangling symlink it errors. Just
# remove it if it exists.
if [[ -L $GRUBENV ]]; then
rm -f $GRUBENV
fi
echo "GRUB_DEVICE=LABEL=${DIB_ROOT_LABEL}" >> /etc/default/grub
echo 'GRUB_DISABLE_LINUX_UUID=true' >> /etc/default/grub
echo "GRUB_TIMEOUT=${DIB_GRUB_TIMEOUT:-5}" >>/etc/default/grub
echo 'GRUB_TERMINAL="serial console"' >>/etc/default/grub
echo 'GRUB_GFXPAYLOAD_LINUX=auto' >>/etc/default/grub
if [[ -n "${DIB_BOOTLOADER_SERIAL_CONSOLE}" ]]; then
SERIAL_CONSOLE="${DIB_BOOTLOADER_SERIAL_CONSOLE}"
elif [[ "powerpc ppc64 ppc64le" =~ "$ARCH" ]]; then
# Serial console on Power is hvc0
SERIAL_CONSOLE="hvc0"
elif [[ "arm64" =~ "$ARCH" ]]; then
SERIAL_CONSOLE="ttyAMA0,115200"
else
SERIAL_CONSOLE="ttyS0,115200"
fi
GRUB_CMDLINE_LINUX_DEFAULT="console=tty0 console=${SERIAL_CONSOLE} no_timer_check"
echo "GRUB_CMDLINE_LINUX_DEFAULT=\"${GRUB_CMDLINE_LINUX_DEFAULT} ${DIB_BOOTLOADER_DEFAULT_CMDLINE}\"" >>/etc/default/grub
echo 'GRUB_SERIAL_COMMAND="serial --speed=115200 --unit=0 --word=8 --parity=no --stop=1"' >>/etc/default/grub
# os-prober leaks /dev/sda into config file in dual-boot host
# Disable grub-os-prober to avoid the issue while running
# grub-mkconfig
# Setting a flag to track whether the entry is already there in grub config
PROBER_DISABLED=
if ! grep -qe "^\s*GRUB_DISABLE_OS_PROBER=true" /etc/default/grub; then
PROBER_DISABLED=true
echo 'GRUB_DISABLE_OS_PROBER=true' >> /etc/default/grub
fi
# GRUB_MKCONFIG call needs to happen after we configure
# /etc/default/grub above. Without this we can set inappropriate
# root device labels and then images don't boot.
#
# This produces a legacy config which both bios and uefi can boot
# Later we copy the final config to an efi specific location to
# support uefi specific functionality like secure boot.
$GRUB_MKCONFIG -o $GRUB_CFG
# If we are using BLS, for debugging purposes dump out the kernel
if [[ -e /boot/loader/entries ]]; then
grubby --info=ALL
fi
# Remove the fix to disable os_prober
if [ -n "$PROBER_DISABLED" ]; then
sed -i '$d' /etc/default/grub
fi
# Fix efi specific instructions in grub config file
if [ -d /sys/firmware/efi ]; then
sed -i 's%\(initrd\|linux\)efi /boot%\1 /boot%g' $GRUB_CFG
fi
# when using efi, and having linux16/initrd16, it needs to be replaced
# by linuxefi/initrdefi. When building images on a non-efi system,
# the 16 suffix is added to linux/initrd entries, but we need it to be
# linuxefi/initrdefi for the image to boot under efi
if [[ ${DIB_BLOCK_DEVICE} == "efi" ]]; then
sed -i 's%\(linux\|initrd\)16 /boot%\1efi /boot%g' $GRUB_CFG
# Finally copy the grub.cfg and grubenv to the EFI specific dir
# to support functionality like secure boot. We make a copy because
# /boot and /boot/efi may be different partitions and uefi looks
# for a specific partition UUID preventing symlinks from working.
if [ -d /boot/efi/$EFI_BOOT_DIR ] ; then
cp $GRUB_CFG /boot/efi/$EFI_BOOT_DIR/grub.cfg
if [ -a $GRUBENV ]; then
cp $GRUBENV /boot/efi/$EFI_BOOT_DIR/grubenv
fi
fi
fi
if [[ ! "$ARCH" =~ "ppc" ]] && [[ -z "${DIB_BLOCK_DEVICE}" ]]; then
echo "WARNING: No bootloader installation will occur."
echo "To install a bootloader ensure you have included a block-device-* element"
exit 0
fi
echo "Installing GRUB2..."
# We need --force so grub does not fail due to being installed on the
# root partition of a block device.
GRUB_OPTS="--force "
if [[ "$ARCH" =~ "ppc" ]] ; then
# For PPC (64-Bit regardless of Endian-ness), we use the "boot"
# partition as the one to point grub-install to, not the loopback
# device. ppc has a dedicated PReP boot partition.
# For grub2 < 2.02~beta3 this needs to be a /dev/mapper/... node after
# that a dev/loopXpN node will work fine.
$GRUBNAME --modules="part_msdos" $GRUB_OPTS ${DEVICES[boot]} --no-nvram
else
# This set of modules is sufficient for all installs (mbr/gpt/efi)
modules="part_msdos part_gpt lvm"
if [[ ${DIB_BLOCK_DEVICE} == "mbr" || ${DIB_BLOCK_DEVICE} == "gpt" ]]; then
if [[ ! "x86_64 amd64" =~ ${ARCH} ]]; then
echo "*** ${ARCH} is not supported by mbr/gpt"
fi
$GRUBNAME --modules="$modules biosdisk" --target=i386-pc \
$GRUB_OPTS $BOOT_DEV
elif [[ ${DIB_BLOCK_DEVICE} == "efi" ]]; then
# We need to manually set the target if it's different to
# the host. Setup for EFI
case $ARCH in
"x86_64"|"amd64")
# This call installs grub for BIOS compatability
# which makes portable EFI/BIOS images.
$GRUBNAME --modules="$modules" --target=i386-pc $BOOT_DEV
# Set the x86_64 specific efi target for the generic
# installation below.
GRUB_OPTS="--target=x86_64-efi"
;;
# At this point, we don't need to override the target
# for any other architectures.
esac
# If we don't have a distro specific dir with presigned efi targets
# we install a generic one.
if [ ! -d /boot/efi/$EFI_BOOT_DIR ]; then
echo "WARNING: /boot/efi/$EFI_BOOT_DIR does not exist, UEFI secure boot not supported"
# This tells the EFI install to put the EFI binaries into
# the generic /BOOT directory and avoids trying to update
# nvram settings.
extra_options="--removable"
$GRUBNAME --modules="$modules" $extra_options $GRUB_OPTS $BOOT_DEV
fi
fi
fi