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Support grubby and the Bootloader Spec

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Fedora 30 and RHEL-8.2 onwards support the Bootloader Spec and use grubby
to manage kernel menu entries and kernel arguments.
https://fedoraproject.org/wiki/Changes/BootLoaderSpecByDefault

This change detects if this is a BLS enabled environment, and uses
grubby to set kernel arguments on all kernel entries if it is.

Change-Id: I2701260d54cf6bc79f1ac765b512d99d799e8c43
This commit is contained in:
Steve Baker 2021-08-10 12:41:27 +12:00
parent b01aac9715
commit 97f940ace5
1 changed files with 18 additions and 28 deletions
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46
diskimage_builder/elements/bootloader/finalise.d/50-bootloader
View file

@ -155,39 +155,26 @@ else
fi
fi
# Fedora 30 and RHEL-8.2 onwards support the Bootloader Spec and use grubby
# to manage kernel menu entries and kernel arguments.
# https://fedoraproject.org/wiki/Changes/BootLoaderSpecByDefault
USE_GRUBBY=
if grep -qe "^\s*GRUB_ENABLE_BLSCFG=true" /etc/default/grub; then
USE_GRUBBY=true
fi
# Override the root device to the default label, and disable uuid
# lookup.
echo "GRUB_DEVICE=LABEL=${DIB_ROOT_LABEL}" >> /etc/default/grub
if [ -n "$USE_GRUBBY" ]; then
grubby --update-kernel=ALL --args="root=LABEL=${DIB_ROOT_LABEL}"
else
echo "GRUB_DEVICE=LABEL=${DIB_ROOT_LABEL}" >> /etc/default/grub
fi
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
# NOTE(ianw) : 2021-05-11
# On Fedora there has been a switch to BLS
# https://fedoraproject.org/wiki/Changes/BootLoaderSpecByDefault
# which means that kernel-install will have created entries in
# /boot/loader/entries/...
# and, as the wiki page says
#
# The main issue appears to be that a number of places document
# a way to pass kernel options that is no longer working with
# BLS, i.e. edit /etc/default/grub before running
# grub2-mkconfig.
#
# i.e. exactly what we're doing above to override the root device
# in particular. Override grub2 to use it's old config format and
# remove any BLS entries the kernel install made.
#
# I imagine at some point we will reworking things in a more
# general sense to support BLS if that's what everything is
# switching to.
#
if [[ ${DISTRO_NAME} = fedora ]]; then
echo 'GRUB_ENABLE_BLSCFG=false' >> /etc/default/grub
rm -rf /boot/loader/
fi
if [[ -n "${DIB_BOOTLOADER_SERIAL_CONSOLE}" ]]; then
SERIAL_CONSOLE="${DIB_BOOTLOADER_SERIAL_CONSOLE}"
elif [[ "powerpc ppc64 ppc64le" =~ "$ARCH" ]]; then
@ -200,8 +187,11 @@ else
fi
GRUB_CMDLINE_LINUX_DEFAULT="console=tty0 console=${SERIAL_CONSOLE} no_timer_check"
echo "GRUB_CMDLINE_LINUX_DEFAULT=\"${GRUB_CMDLINE_LINUX_DEFAULT} ${DIB_BOOTLOADER_DEFAULT_CMDLINE}\"" >>/etc/default/grub
if [ -n "$USE_GRUBBY" ]; then
grubby --update-kernel=ALL --args="$GRUB_CMDLINE_LINUX_DEFAULT"
else
echo "GRUB_CMDLINE_LINUX_DEFAULT=\"${GRUB_CMDLINE_LINUX_DEFAULT} ${DIB_BOOTLOADER_DEFAULT_CMDLINE}\"" >>/etc/default/grub
fi
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