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# Copyright (C) 2024 VyOS maintainers and contributors
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 or later as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
# File: raw_image.py
# Purpose: Helper functions for building raw images.
import os
import sys
import shutil
import traceback
import vyos.utils.process
SQUASHFS_FILE = 'live/filesystem.squashfs'
VERSION_FILE = 'version.json'
from utils import cmd
def mkdir(path):
os.makedirs(path, exist_ok=True)
class BuildContext:
def __init__(self, iso_path, work_dir, debug=False):
self.work_dir = work_dir
self.iso_path = iso_path
self.debug = debug
self.loop_device = None
def __enter__(self):
print(f"I: Setting up a raw image build directory in {self.work_dir}")
self.iso_dir = os.path.join(self.work_dir, "iso")
self.squash_dir = os.path.join(self.work_dir, "squash")
self.raw_dir = os.path.join(self.work_dir, "raw")
self.efi_dir = os.path.join(self.work_dir, "efi")
# Create mount point directories
mkdir(self.iso_dir)
mkdir(self.squash_dir)
mkdir(self.raw_dir)
mkdir(self.efi_dir)
# Mount the ISO image
cmd(f"""mount -t iso9660 -o ro,loop {self.iso_path} {self.iso_dir}""")
# Mount the SquashFS image
cmd(f"""mount -t squashfs -o ro,loop {self.iso_dir}/{SQUASHFS_FILE} {self.squash_dir}""")
return self
def __exit__(self, exc_type, exc_value, exc_tb):
print(f"I: Tearing down the raw image build environment in {self.work_dir}")
cmd(f"""umount {self.squash_dir}/dev/""")
cmd(f"""umount {self.squash_dir}/proc/""")
cmd(f"""umount {self.squash_dir}/sys/""")
cmd(f"umount {self.squash_dir}/boot/efi")
cmd(f"umount {self.squash_dir}/boot")
cmd(f"""umount {self.squash_dir}""")
cmd(f"""umount {self.iso_dir}""")
cmd(f"""umount {self.raw_dir}""")
cmd(f"""umount {self.efi_dir}""")
if self.loop_device:
cmd(f"""losetup -d {self.loop_device}""")
def create_disk(path, size):
cmd(f"""qemu-img create -f raw "{path}" {size}G""")
def read_version_data(iso_dir):
from json import load
with open(os.path.join(iso_dir, VERSION_FILE), 'r') as f:
data = load(f)
return data
def setup_loop_device(con, raw_file):
from subprocess import Popen, PIPE, STDOUT
from re import match
command = f'losetup --show -f {raw_file}'
p = Popen(command, stderr=PIPE, stdout=PIPE, stdin=PIPE, shell=True)
(stdout, stderr) = p.communicate()
if p.returncode > 0:
raise OSError(f"Could not set up a loop device: {stderr.decode()}")
con.loop_device = stdout.decode().strip()
if con.debug:
print(f"I: Using loop device {con.loop_device}")
def mount_image(con):
import vyos.system.disk
from subprocess import Popen, PIPE, STDOUT
from re import match
vyos.system.disk.filesystem_create(con.disk_details.partition['efi'], 'efi')
vyos.system.disk.filesystem_create(con.disk_details.partition['root'], 'ext4')
cmd(f"mount -t ext4 {con.disk_details.partition['root']} {con.raw_dir}")
cmd(f"mount -t vfat {con.disk_details.partition['efi']} {con.efi_dir}")
def install_image(con, version):
from glob import glob
vyos_dir = os.path.join(con.raw_dir, f'boot/{version}/')
mkdir(vyos_dir)
mkdir(os.path.join(vyos_dir, 'work/work'))
mkdir(os.path.join(vyos_dir, 'rw'))
shutil.copy(f"{con.iso_dir}/{SQUASHFS_FILE}", f"{vyos_dir}/{version}.squashfs")
boot_files = glob(f'{con.squash_dir}/boot/*')
boot_files = [f for f in boot_files if os.path.isfile(f)]
for f in boot_files:
print(f"I: Copying file {f}")
shutil.copy(f, vyos_dir)
with open(f"{con.raw_dir}/persistence.conf", 'w') as f:
f.write("/ union\n")
def setup_grub_configuration(build_config, root_dir) -> None:
"""Install GRUB configurations
Args:
root_dir (str): a path to the root of target filesystem
"""
from vyos.template import render
from vyos.system import grub
print('I: Installing GRUB configuration files')
grub_cfg_main = f'{root_dir}/{grub.GRUB_DIR_MAIN}/grub.cfg'
grub_cfg_vars = f'{root_dir}/{grub.CFG_VYOS_VARS}'
grub_cfg_modules = f'{root_dir}/{grub.CFG_VYOS_MODULES}'
grub_cfg_menu = f'{root_dir}/{grub.CFG_VYOS_MENU}'
grub_cfg_options = f'{root_dir}/{grub.CFG_VYOS_OPTIONS}'
# create new files
render(grub_cfg_main, grub.TMPL_GRUB_MAIN, {})
grub.common_write(root_dir)
grub.vars_write(grub_cfg_vars, build_config["boot_settings"])
grub.modules_write(grub_cfg_modules, [])
grub.write_cfg_ver(1, root_dir)
render(grub_cfg_menu, grub.TMPL_GRUB_MENU, {})
render(grub_cfg_options, grub.TMPL_GRUB_OPTS, {})
def install_grub(con, version):
from re import match
from vyos.system import disk, grub
# Mount the required virtual filesystems
os.makedirs(f"{con.raw_dir}/boot/efi", exist_ok=True)
cmd(f"mount --bind /dev {con.squash_dir}/dev")
cmd(f"mount --bind /proc {con.squash_dir}/proc")
cmd(f"mount --bind /sys {con.squash_dir}/sys")
cmd(f"mount --bind {con.raw_dir}/boot {con.squash_dir}/boot")
cmd(f"mount --bind {con.efi_dir} {con.squash_dir}/boot/efi")
DIR_DST_ROOT = con.raw_dir
setup_grub_configuration(con.build_config, DIR_DST_ROOT)
# add information about version
grub.create_structure(DIR_DST_ROOT)
grub.version_add(version, DIR_DST_ROOT)
grub.set_default(version, DIR_DST_ROOT)
grub.set_console_type(con.build_config["boot_settings"]["console_type"], DIR_DST_ROOT)
print('I: Installing GRUB to the disk image')
grub.install(con.loop_device, f'/boot/', f'/boot/efi', chroot=con.squash_dir)
# sort inodes (to make GRUB read config files in alphabetical order)
grub.sort_inodes(f'{DIR_DST_ROOT}/{grub.GRUB_DIR_VYOS}')
grub.sort_inodes(f'{DIR_DST_ROOT}/{grub.GRUB_DIR_VYOS_VERS}')
def create_raw_image(build_config, iso_file, work_dir):
from vyos.system.disk import parttable_create
if not os.path.exists(iso_file):
print(f"E: ISO file {iso_file} does not exist in the build directory")
sys.exit(1)
with BuildContext(iso_file, work_dir, debug=True) as con:
con.build_config = build_config
version_data = read_version_data(con.iso_dir)
version = version_data['version']
raw_file = f"vyos-{version}.raw"
print(f"I: Building raw file {raw_file}")
create_disk(raw_file, build_config["disk_size"])
setup_loop_device(con, raw_file)
disk_details = parttable_create(con.loop_device, (int(build_config["disk_size"]) - 1) * 1024 * 1024)
con.disk_details = disk_details
mount_image(con)
install_image(con, version)
install_grub(con, version)
return raw_file
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