flatcar-scripts/build_library/prod_image_util.sh

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# Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
# Copyright (c) 2013 The CoreOS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
setup_prod_image() {
local image_name="$1"
local disk_layout="$2"
local au_key="$3"
info "Configuring production image ${image_name}"
local root_fs_dir="${BUILD_DIR}/rootfs"
local enable_rootfs_verification_flag=--noenable_rootfs_verification
if [[ ${FLAGS_enable_rootfs_verification} -eq ${FLAGS_TRUE} ]]; then
enable_rootfs_verification_flag=--enable_rootfs_verification
fi
"${BUILD_LIBRARY_DIR}/disk_util" --disk_layout="${disk_layout}" \
mount "${BUILD_DIR}/${image_name}" "${root_fs_dir}"
trap "cleanup_mounts '${root_fs_dir}' && delete_prompt" EXIT
# Install an auto update key on the root before sealing it off
local key_location=${root_fs_dir}"/usr/share/update_engine/"
sudo mkdir -p "${key_location}"
sudo cp "${au_key}" "$key_location/update-payload-key.pub.pem"
sudo chown root:root "$key_location/update-payload-key.pub.pem"
sudo chmod 644 "$key_location/update-payload-key.pub.pem"
# clean-ups of things we do not need
sudo rm ${root_fs_dir}/etc/csh.env
sudo rm -rf ${root_fs_dir}/var/db/pkg
sudo rm ${root_fs_dir}/var/db/Makefile
sudo rm ${root_fs_dir}/etc/locale.gen
sudo rm -rf ${root_fs_dir}/etc/lvm/
# clear them out explicitly, so this fails if something else gets dropped
# into xinetd.d
sudo rm ${root_fs_dir}/etc/xinetd.d/rsyncd
sudo rmdir ${root_fs_dir}/etc/xinetd.d
cleanup_mounts "${root_fs_dir}"
trap - EXIT
# Make the filesystem un-mountable as read-write.
if [ ${FLAGS_enable_rootfs_verification} -eq ${FLAGS_TRUE} ]; then
local ro_label="ROOT-A"
if [[ "${disk_layout}" == *-usr ]]; then
ro_label="USR-A"
fi
"${BUILD_LIBRARY_DIR}/disk_util" --disk_layout="${disk_layout}" \
tune --disable2fs_rw "${BUILD_DIR}/${image_name}" "${ro_label}"
fi
}