mirror of
https://github.com/flatcar/scripts.git
synced 2025-11-04 02:01:22 +01:00
92 lines
2.5 KiB
Bash
Executable File
92 lines
2.5 KiB
Bash
Executable File
#!/bin/bash
|
|
|
|
# Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
|
|
# Use of this source code is governed by a BSD-style license that can be
|
|
# found in the LICENSE file.
|
|
|
|
# Helper script to generate bootloader configuration files for systems
|
|
# that predate our new GRUB2 based gptprio bootloader.
|
|
|
|
SCRIPT_ROOT=$(readlink -f $(dirname "$0")/..)
|
|
. "${SCRIPT_ROOT}/common.sh" || exit 1
|
|
|
|
# We're invoked only by build_image, which runs in the chroot
|
|
assert_inside_chroot
|
|
|
|
# Flags.
|
|
DEFINE_string boot_dir "/tmp/boot" \
|
|
"Path to boot directory in root filesystem (Default: /tmp/boot)"
|
|
|
|
# Parse flags
|
|
FLAGS "$@" || exit 1
|
|
eval set -- "${FLAGS_ARGV}"
|
|
switch_to_strict_mode
|
|
|
|
# Common kernel command-line args
|
|
common_args="console=tty0 ro noswap cros_legacy"
|
|
common_args="${common_args} ${FLAGS_boot_args}"
|
|
|
|
# Filesystem command line args.
|
|
root_args="root=LABEL=ROOT rootflags=subvol=root"
|
|
slot_a_args="${root_args} usr=PARTLABEL=USR-A"
|
|
slot_b_args="${root_args} usr=PARTLABEL=USR-B"
|
|
|
|
GRUB_DIR="${FLAGS_boot_dir}/grub"
|
|
SYSLINUX_DIR="${FLAGS_boot_dir}/syslinux"
|
|
|
|
# Build configuration files for pygrub/pvgrub
|
|
configure_pvgrub() {
|
|
info "Installing legacy PV-GRUB configuration"
|
|
sudo mkdir -p "${GRUB_DIR}"
|
|
|
|
# Add hvc0 for hypervisors
|
|
grub_args="${common_args} console=hvc0"
|
|
|
|
sudo_clobber "${GRUB_DIR}/menu.lst.A" <<EOF
|
|
timeout 0
|
|
|
|
title Flatcar A Root
|
|
root (hd0,0)
|
|
kernel /syslinux/vmlinuz.A ${grub_args} ${slot_a_args}
|
|
|
|
title Flatcar B Root
|
|
root (hd0,0)
|
|
kernel /syslinux/vmlinuz.B ${grub_args} ${slot_b_args}
|
|
EOF
|
|
|
|
sudo_clobber "${GRUB_DIR}/menu.lst.B" <<EOF
|
|
default 1
|
|
$(< "${GRUB_DIR}/menu.lst.A")
|
|
EOF
|
|
}
|
|
|
|
# Build configuration files for syslinux
|
|
configure_syslinux() {
|
|
info "Installing legacy SYSLINUX configuration"
|
|
sudo mkdir -p "${SYSLINUX_DIR}"
|
|
|
|
# Add ttyS0 as a secondary console, useful for qemu -nographic
|
|
# This leaves /dev/console mapped to tty0 (vga) which is reasonable default.
|
|
syslinux_args="console=ttyS0,115200n8 ${common_args}"
|
|
|
|
sudo_clobber "${SYSLINUX_DIR}/default.cfg.A" <<<"DEFAULT coreos.A"
|
|
sudo_clobber "${SYSLINUX_DIR}/default.cfg.B" <<<"DEFAULT coreos.B"
|
|
|
|
sudo_clobber "${SYSLINUX_DIR}/root.A.cfg" <<EOF
|
|
label coreos.A
|
|
menu label coreos.A
|
|
kernel vmlinuz.A
|
|
append ${syslinux_args} ${slot_a_args}
|
|
EOF
|
|
|
|
sudo_clobber "${SYSLINUX_DIR}/root.B.cfg" <<EOF
|
|
label coreos.B
|
|
menu label coreos.B
|
|
kernel vmlinuz.B
|
|
append ${syslinux_args} ${slot_b_args}
|
|
EOF
|
|
}
|
|
|
|
configure_pvgrub
|
|
configure_syslinux
|