mirror of
https://github.com/flatcar/scripts.git
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23b1b01f1a
Already cleaned up the contrived cat/dd combo for the pvgrub configs, do the same for the syslinux configs.
129 lines
3.7 KiB
Bash
Executable File
129 lines
3.7 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 GRUB bootloader configuration files for
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# x86 platforms.
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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 arch "x86" \
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"The boot architecture: arm or x86. (Default: x86)"
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DEFINE_string to "/tmp/boot" \
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"Path to populate with bootloader templates (Default: /tmp/boot)"
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DEFINE_string boot_args "" \
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"Additional boot arguments to pass to the commandline (Default: '')"
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DEFINE_boolean enable_rootfs_verification ${FLAGS_FALSE} \
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"Controls if verity is used for root filesystem checking (Default: false)"
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# Parse flags
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FLAGS "$@" || exit 1
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eval set -- "${FLAGS_ARGV}"
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switch_to_strict_mode
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# Useful for getting partition UUID values
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. "${BUILD_LIBRARY_DIR}/disk_layout_util.sh" || exit 1
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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} ${FLAGS_boot_args}"
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# Populate the x86 rootfs to support legacy and EFI bios config templates.
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# The templates are used by the installer to populate partition 12 with
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# the correct bootloader configuration.
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if [[ "${FLAGS_arch}" = "x86" || "${FLAGS_arch}" = "amd64" ]]; then
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sudo mkdir -p ${FLAGS_to}
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# Get partition UUIDs from the json config
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ROOTA="PARTUUID=$(get_uuid base ROOT-A)"
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ROOTB="PARTUUID=$(get_uuid base ROOT-B)"
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# Build configuration files for pygrub/pvgrub
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GRUB_DIR="${FLAGS_to}/boot/grub"
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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 ${grub_args} root=${ROOTA}
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title CoreOS B Root
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root (hd0,0)
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kernel /syslinux/vmlinuz.B ${grub_args} root=${ROOTB}
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EOF
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info "Emitted ${GRUB_DIR}/menu.lst.A"
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sudo_clobber "${GRUB_DIR}/menu.lst.B" <<EOF
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default 1
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EOF
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sudo_append "${GRUB_DIR}/menu.lst.B" <"${GRUB_DIR}/menu.lst.A"
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info "Emitted ${GRUB_DIR}/menu.lst.B"
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sudo cp ${GRUB_DIR}/menu.lst.A ${GRUB_DIR}/menu.lst
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SYSLINUX_DIR="${FLAGS_to}/syslinux"
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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}/syslinux.cfg" <<EOF
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SERIAL 0 115200
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PROMPT 0
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TIMEOUT 0
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DEFAULT boot_kernel
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include /syslinux/boot_kernel.cfg
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# coreos.A
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include /syslinux/root.A.cfg
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# coreos.B
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include /syslinux/root.B.cfg
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EOF
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info "Emitted ${SYSLINUX_DIR}/syslinux.cfg"
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# Different files are used so that the updater can only touch the file it
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# needs to for a given change. This will minimize any potential accidental
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# updates issues, hopefully.
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sudo_clobber "${SYSLINUX_DIR}/boot_kernel.cfg" <<EOF
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label boot_kernel
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menu label boot_kernel
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kernel vmlinuz-boot_kernel
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append ${syslinux_args} root=gptprio:
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EOF
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info "Emitted ${SYSLINUX_DIR}/boot_kernel.cfg"
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sudo_clobber "${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 ${syslinux_args} root=${ROOTA}
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EOF
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info "Emitted ${SYSLINUX_DIR}/root.A.cfg"
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sudo_clobber "${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 ${syslinux_args} root=${ROOTB}
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EOF
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info "Emitted ${SYSLINUX_DIR}/root.B.cfg"
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exit 0
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fi
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info "The target platform does not use bootloader templates."
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