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