253 lines
9.4 KiB
Bash
Executable File
253 lines
9.4 KiB
Bash
Executable File
#!/bin/bash
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# Configure grub. Note that the various conditionals here are to handle
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# different distributions gracefully.
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if [ ${DIB_DEBUG_TRACE:-1} -gt 0 ]; then
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set -x
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fi
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set -eu
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set -o pipefail
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if [ ${DIB_EXTLINUX:-0} != "0" ]; then
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echo "DIB_EXTLINUX no longer supported"
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exit 1
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fi
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# Some distros have pre-installed grub in some other way, and want to
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# skip this.
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if [[ -f "/tmp/grub/install" ]]; then
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exit 0
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fi
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BOOT_DEV=$IMAGE_BLOCK_DEVICE
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# All available devices, handy for some bootloaders...
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declare -A DEVICES
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eval DEVICES=( $IMAGE_BLOCK_DEVICES )
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# Right now we can't use pkg-map to branch by arch, so tag an
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# architecture specific virtual package so we can install the
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# rigth thing based on distribution.
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if [[ "$ARCH" =~ "ppc" ]]; then
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install-packages -m bootloader grub-ppc64
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elif [[ "${DIB_BLOCK_DEVICE}" == "mbr" ||
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"${DIB_BLOCK_DEVICE}" == "gpt" ]]; then
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install-packages -m bootloader grub-pc
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elif [[ "${DIB_BLOCK_DEVICE}" == "efi" ]]; then
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install-packages -e -m bootloader grub-efi-$ARCH
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install-packages -m bootloader grub-efi grub-efi-$ARCH
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else
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echo "Failure: I'm not sure what bootloader to install"
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echo "Ensure you have included a block-device-* element"
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exit 1
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fi
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GRUBNAME=$(type -p grub-install) || echo "trying grub2-install"
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if [ -z "$GRUBNAME" ]; then
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GRUBNAME=$(type -p grub2-install)
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fi
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if type grub2-mkconfig >/dev/null; then
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GRUB_MKCONFIG="grub2-mkconfig"
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else
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GRUB_MKCONFIG="grub-mkconfig"
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fi
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echo "Installing GRUB2..."
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# This might be better factored out into a per-distro 'install-bootblock'
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# helper.
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if [ -d /boot/grub2 ]; then
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GRUB_CFG=/boot/grub2/grub.cfg
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GRUBENV=/boot/grub2/grubenv
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else
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# TODO(frickler): /boot/grub doesn't seem to exist for gentoo either
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# at this point, let's hope it gets created later
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GRUB_CFG=/boot/grub/grub.cfg
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GRUBENV=/boot/grub/grubenv
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fi
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# When using EFI image-based builds, particularly rhel element
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# based on RHEL>=8.2 .qcow2, we might have /boot/grub2/grubenv
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# as a dangling symlink to /boot/efi because we have extracted
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# it from the root fs, but we didn't populate the separate EFI
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# boot partition from the image. grub2-install calls rename()
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# on this file, so if it's a dangling symlink it errors. Just
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# remove it if it exists.
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if [[ -L $GRUBENV ]]; then
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rm -f $GRUBENV
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fi
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# We need --force so grub does not fail due to being installed on the
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# root partition of a block device.
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GRUB_OPTS=${GRUB_OPTS:-"--force"}
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# XXX: This is buggy:
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# - --target=i386-pc is invalid for non-i386/amd64 architectures
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# - and for UEFI too.
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# GRUB_OPTS="$GRUB_OPTS --target=i386-pc"
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if [[ ! $GRUB_OPTS == *--target* ]] && [[ $($GRUBNAME --version) =~ ' 2.' ]]; then
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# /sys/ comes from the host machine. If the host machine is using EFI
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# but the image being built doesn't have EFI boot-images installed we
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# should set the --target to use a BIOS-based boot-image.
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#
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# * --target tells grub what's the target platform
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# * the boot images are placed in /usr/lib/grub/<cpu>-<platform>
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# * i386-pc is used for BIOS-based machines
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# http://www.gnu.org/software/grub/manual/grub.html#Installation
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#
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if [ -d /sys/firmware/efi ]; then
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if [ ! -d /usr/lib/grub/*-efi ]; then
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case $ARCH in
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"x86_64"|"amd64")
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GRUB_OPTS="$GRUB_OPTS --target=i386-pc"
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;;
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"i386")
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target=i386-pc
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if [ -e /proc/device-tree ]; then
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for x in /proc/device-tree/*; do
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if [ -e "$x" ]; then
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target="i386-ieee1275"
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fi
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done
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fi
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GRUB_OPTS="$GRUB_OPTS --target=$target"
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;;
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esac
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fi
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fi
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fi
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if [[ "$ARCH" =~ "ppc" ]] ; then
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# For PPC (64-Bit regardless of Endian-ness), we use the "boot"
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# partition as the one to point grub-install to, not the loopback
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# device. ppc has a dedicated PReP boot partition.
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# For grub2 < 2.02~beta3 this needs to be a /dev/mapper/... node after
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# that a dev/loopXpN node will work fine.
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$GRUBNAME --modules="part_msdos" $GRUB_OPTS ${DEVICES[boot]} --no-nvram
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else
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# This set of modules is sufficient for all installs (mbr/gpt/efi)
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modules="part_msdos part_gpt lvm"
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if [[ ${DIB_BLOCK_DEVICE} == "mbr" || ${DIB_BLOCK_DEVICE} == "gpt" ]]; then
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$GRUBNAME --modules="$modules biosdisk" $GRUB_OPTS $BOOT_DEV
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elif [[ ${DIB_BLOCK_DEVICE} == "efi" ]]; then
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# We need to manually set the target if it's different to
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# the host. Setup for EFI
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case $ARCH in
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"x86_64"|"amd64")
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# This call installs grub for BIOS compatability
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# which makes portable EFI/BIOS images.
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$GRUBNAME --modules="$modules" --target=i386-pc $BOOT_DEV
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# Set the x86_64 specific efi target for the generic
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# installation below.
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GRUB_OPTS="--target=x86_64-efi"
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;;
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# At this point, we don't need to override the target
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# for any other architectures.
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esac
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# If we don't have a distro specific dir with presigned efi targets
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# we install a generic one.
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if [ ! -d /boot/efi/$EFI_BOOT_DIR ]; then
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echo "WARNING: /boot/efi/$EFI_BOOT_DIR does not exist, UEFI secure boot not supported"
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# This tells the EFI install to put the EFI binaries into
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# the generic /BOOT directory and avoids trying to update
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# nvram settings.
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extra_options="--removable"
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$GRUBNAME --modules="$modules" $extra_options $GRUB_OPTS $BOOT_DEV
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fi
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fi
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fi
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# Fedora 30 and RHEL-8.2 onwards support the Bootloader Spec and use grubby
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# to manage kernel menu entries and kernel arguments.
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# https://fedoraproject.org/wiki/Changes/BootLoaderSpecByDefault
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USE_GRUBBY=
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if grep -qe "^\s*GRUB_ENABLE_BLSCFG=true" /etc/default/grub; then
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USE_GRUBBY=true
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fi
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# When building CentOS9 with centos-minimal /etc/default/grub does not exist
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# after grub2-tools installation. However we need CS9 to use grubby.
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if [[ "$DISTRO_NAME" == "centos" ]] && [[ $DIB_RELEASE =~ 9 ]]; then
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USE_GRUBBY=true
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fi
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# Override the root device to the default label, and disable uuid
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# lookup.
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if [ -n "$USE_GRUBBY" ]; then
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grubby --update-kernel=ALL --args="root=LABEL=${DIB_ROOT_LABEL}"
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else
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echo "GRUB_DEVICE=LABEL=${DIB_ROOT_LABEL}" >> /etc/default/grub
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fi
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echo 'GRUB_DISABLE_LINUX_UUID=true' >> /etc/default/grub
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echo "GRUB_TIMEOUT=${DIB_GRUB_TIMEOUT:-5}" >>/etc/default/grub
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echo 'GRUB_TERMINAL="serial console"' >>/etc/default/grub
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echo 'GRUB_GFXPAYLOAD_LINUX=auto' >>/etc/default/grub
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if [[ -n "${DIB_BOOTLOADER_SERIAL_CONSOLE}" ]]; then
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SERIAL_CONSOLE="${DIB_BOOTLOADER_SERIAL_CONSOLE}"
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elif [[ "powerpc ppc64 ppc64le" =~ "$ARCH" ]]; then
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# Serial console on Power is hvc0
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SERIAL_CONSOLE="hvc0"
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elif [[ "arm64" =~ "$ARCH" ]]; then
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SERIAL_CONSOLE="ttyAMA0,115200"
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else
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SERIAL_CONSOLE="ttyS0,115200"
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fi
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GRUB_CMDLINE_LINUX_DEFAULT="console=tty0 console=${SERIAL_CONSOLE} no_timer_check"
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if [ -n "$USE_GRUBBY" ]; then
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grubby --update-kernel=ALL --args="${GRUB_CMDLINE_LINUX_DEFAULT} ${DIB_BOOTLOADER_DEFAULT_CMDLINE}"
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else
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echo "GRUB_CMDLINE_LINUX_DEFAULT=\"${GRUB_CMDLINE_LINUX_DEFAULT} ${DIB_BOOTLOADER_DEFAULT_CMDLINE}\"" >>/etc/default/grub
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fi
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echo 'GRUB_SERIAL_COMMAND="serial --speed=115200 --unit=0 --word=8 --parity=no --stop=1"' >>/etc/default/grub
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# os-prober leaks /dev/sda into config file in dual-boot host
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# Disable grub-os-prober to avoid the issue while running
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# grub-mkconfig
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# Setting a flag to track whether the entry is already there in grub config
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PROBER_DISABLED=
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if ! grep -qe "^\s*GRUB_DISABLE_OS_PROBER=true" /etc/default/grub; then
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PROBER_DISABLED=true
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echo 'GRUB_DISABLE_OS_PROBER=true' >> /etc/default/grub
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fi
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# GRUB_MKCONFIG call needs to happen after we configure
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# /etc/default/grub above. Without this we can set inappropriate
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# root device labels and then images don't boot.
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#
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# This produces a legacy config which both bios and uefi can boot
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# Later we copy the final config to an efi specific location to
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# support uefi specific functionality like secure boot.
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$GRUB_MKCONFIG -o $GRUB_CFG
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# Remove the fix to disable os_prober
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if [ -n "$PROBER_DISABLED" ]; then
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sed -i '$d' /etc/default/grub
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fi
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# Fix efi specific instructions in grub config file
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if [ -d /sys/firmware/efi ]; then
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sed -i 's%\(initrd\|linux\)efi /boot%\1 /boot%g' $GRUB_CFG
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fi
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# when using efi, and having linux16/initrd16, it needs to be replaced
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# by linuxefi/initrdefi. When building images on a non-efi system,
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# the 16 suffix is added to linux/initrd entries, but we need it to be
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# linuxefi/initrdefi for the image to boot under efi
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if [[ ${DIB_BLOCK_DEVICE} == "efi" ]]; then
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sed -i 's%\(linux\|initrd\)16 /boot%\1efi /boot%g' $GRUB_CFG
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# Finally copy the grub.cfg and grubenv to the EFI specific dir
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# to support functionality like secure boot. We make a copy because
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# /boot and /boot/efi may be different partitions and uefi looks
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# for a specific partition UUID preventing symlinks from working.
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if [ -d /boot/efi/$EFI_BOOT_DIR ] ; then
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cp $GRUB_CFG /boot/efi/$EFI_BOOT_DIR/grub.cfg
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if [ -a $GRUBENV ]; then
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cp $GRUBENV /boot/efi/$EFI_BOOT_DIR/grubenv
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fi
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fi
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fi
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