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https://github.com/flatcar/scripts.git
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d443daa168
This uses our new GRUB2 features to handle GPT priority partition selection, terminal selection, OEM tweaks, etc. The old SYSLINUX and PV-GRUB configs are now unused except for maintaining compatibility with older installs. Of the old configs only the ones that coreos-postinst copies are needed. The new setup supports using GRUB2 under Xen, giving us automatic fallback support on all of our platforms for the very first time! Since grub.cfg is copied into place instead of generated, build_image's --boot_args option is no longer supported. It could be re-added later with some sed goo but for now it is easy enough to just edit grub.cfg.
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 CoreOS 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 CoreOS 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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