diskimage-builder/diskimage_builder/elements/dracut-regenerate/finalise.d/50-dracut-regenerate

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#!/usr/local/bin/dib-python
# Copyright 2017 Red Hat, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import os
import re
import subprocess
import yaml
def main():
dracut_env = os.getenv('DIB_DRACUT_ENABLED_MODULES')
dracut_objects = yaml.safe_load(dracut_env)
modules_to_boot = []
for dracut_object in dracut_objects:
# first, install dependent packages
packages = dracut_object.get('packages', [])
for package in packages:
cmdline = ["install-packages", package]
subp = subprocess.Popen(cmdline, stdout=subprocess.PIPE)
out = subp.communicate()[0]
if subp.returncode:
e = subprocess.CalledProcessError(subp.returncode, cmdline)
e.output = out
raise e
# second, compose the list of modules to boot
modules_to_boot.append(dracut_object.get('name', None))
# regenerate dracut with the list of installed modules
if len(modules_to_boot) > 0:
cmdline = ["select-boot-kernel-initrd"]
subp = subprocess.Popen(cmdline, stdout=subprocess.PIPE)
out, err = subp.communicate()
if subp.returncode:
e = subprocess.CalledProcessError(subp.returncode, cmdline)
e.output = out
raise e
kernel_set = out.decode().split(':')
kernel_search = re.match("vmlinuz-(.*)", kernel_set[0])
kernel_version = "%s" % kernel_search.groups(1)
ramdisk_path = "/boot/%s" % kernel_set[1].strip()
modules_to_boot = ' ' .join(modules_to_boot)
subp = subprocess.Popen(['dracut', '--force', '--add', modules_to_boot,
'-f', ramdisk_path, kernel_version],
stdout=subprocess.PIPE)
subp.wait()
if __name__ == '__main__':
main()