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Commit e5142069 authored by Peter Senna Tschudin's avatar Peter Senna Tschudin
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Signed-off-by: default avatarPeter Senna Tschudin <peter.senna@collabora.com>
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Valid-License-Identifier: GPL-2.0
Valid-License-Identifier: GPL-2.0-only
Valid-License-Identifier: GPL-2.0+
Valid-License-Identifier: GPL-2.0-or-later
SPDX-URL: https://spdx.org/licenses/GPL-2.0.html
Usage-Guide:
To use this license in source code, put one of the following SPDX
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For 'GNU General Public License (GPL) version 2 only' use:
SPDX-License-Identifier: GPL-2.0
or
SPDX-License-Identifier: GPL-2.0-only
For 'GNU General Public License (GPL) version 2 or any later version' use:
SPDX-License-Identifier: GPL-2.0+
or
SPDX-License-Identifier: GPL-2.0-or-later
License-Text:
GNU GENERAL PUBLIC LICENSE
Version 2, June 1991
Copyright (C) 1989, 1991 Free Software Foundation, Inc.
51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
Preamble
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How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
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convey the exclusion of warranty; and each file should have at least
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<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
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.
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Also add information on how to contact you by electronic and paper mail.
If the program is interactive, make it output a short notice like this
when it starts in an interactive mode:
Gnomovision version 69, Copyright (C) year name of author
Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, the commands you use may
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mouse-clicks or menu items--whatever suits your program.
You should also get your employer (if you work as a programmer) or your
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necessary. Here is a sample; alter the names:
Yoyodyne, Inc., hereby disclaims all copyright interest in the program
`Gnomovision' (which makes passes at compilers) written by James Hacker.
<signature of Ty Coon>, 1 April 1989
Ty Coon, President of Vice
This General Public License does not permit incorporating your program into
proprietary programs. If your program is a subroutine library, you may
consider it more useful to permit linking proprietary applications with the
library. If this is what you want to do, use the GNU Library General
Public License instead of this License.
README 0 → 100644
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# SDK PERSISTENT WORKSPACE
This package allow to use an external disk to store the workspace(/home and
/opt) and a convenient mechanism to overwrite configuration files
tools/prepare_persistent_disk.py 0 → 100755
+ 268
− 0
View file @ e5142069
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
#
# Copyright © 2019 Collabora Ltd.
#
# SPDX-License-Identifier: GPL-2.0
# SPDX-URL: https://spdx.org/licenses/GPL-2.0.html
"""Script to prepeare a new disk to be used as persistent storage"""
import os
import stat
import subprocess
import argparse
import time
import re
import tempfile
from string import Template
DISK_LABEL = "sdk-persistent"
MOUNT_POINT = "/run/media/persistent"
def _run(cmd):
""" Print the command and run it"""
print("\nRunning: " + ' '.join(cmd))
return subprocess.run(cmd, stdout=subprocess.PIPE)
class Disk:
"""Persistent disk with a single partation for /home filesystem. There are
two special directories:
- persistent/opt: bind mounted to /opt
- persistent/etc: files and directories found here are individually
bind mounted to /etc"""
directories = ["etc", "opt"]
def __init__(self, diskpath, label):
"""Initializer"""
self.diskpath = diskpath
# The disk contains only one partition
self.partpath = self.diskpath + "1"
self.label = label
self.is_valid = self.isvalid()
if not self.is_valid:
raise Exception(self.diskpath + " is not a valid path to a disk device node")
self.is_mount = self.ismount()
self.is_empty = self.isempty()
def _copy(self):
"""Create root directories and copy data to the persistent storage"""
for d in self.directories:
# sudo here is to create the directories as root
command = ["sudo", "mkdir", "-p", MOUNT_POINT + "/" + d]
_run(command)
# Copy contents of /home to MOUNT_POINT
command = ["sudo", "cp", "-axv", "/home/.", MOUNT_POINT]
result = _run(command)
print(result.stdout.decode())
# Copy /opt to MOUNT_POINT/opt
command = ["sudo", "cp", "-axv", "/opt", MOUNT_POINT]
result = _run(command)
print(result.stdout.decode())
def _format(self):
"""Format the partition using ext4"""
command = ["sudo", "mkfs.btrfs", "-f", "-L", DISK_LABEL, self.partpath]
result = _run(command)
print(result.stdout.decode())
def _mount(self):
"""Create mount point and mount the fs"""
command = ["sudo", "mkdir", "-p", MOUNT_POINT]
_run(command)
command = ["sudo", "mount", "-L", DISK_LABEL, MOUNT_POINT]
_run(command)
def _part(self):
"""Create a single Linux partition using all disk"""
# ,,L means start at 0, use all disk, Linux partition
command = "echo ',,L' | sudo sfdisk --label gpt " + self.diskpath
print("Running: " + command)
output = subprocess.check_output(command, shell=True)
#print(output.decode())
# Give the kernel a moment to update the partition table
time.sleep(3)
def _umount(self):
"""Unmount the fs"""
command = ["sudo", "umount", MOUNT_POINT]
_run(command)
def initialize(self):
"""Initialize a new disk to be used as persistent storage"""
if self.is_mount:
raise Exception("Cannot initialize a mounted disk")
if not self.is_empty:
raise Exception("Cannot initialize a disk that is not empty")
self._part()
self._format()
self._mount()
self._copy()
self._umount()
def isvalid(self):
"""Check if path is a valid disk"""
mode = os.stat(self.diskpath).st_mode
return stat.S_ISBLK(mode)
def isempty(self):
"""Call wipefs to check if the disk is clear"""
command = ["sudo", "/sbin/wipefs", self.diskpath]
result = _run(command)
if not result.stdout:
return True
return False
def ismount(self):
"""Check if the disk is mounted"""
result = subprocess.run(["mount"], stdout=subprocess.PIPE)
mounts = result.stdout.decode().split('\n')
for line in mounts:
if line[:len(self.partpath)] == self.partpath:
return True
return False
def update_fstab():
"""update fstab and return old-home UUID:
- Save old-home UUID
- Comment old-home based on UUID
- Add new home based on LABEL"""
#command = ["sudo", "cp", "-f", "/etc/fstab", "/tmp"]
#result = _run(command)
new_fstab = ""
old_home_uuid = ""
new_home_line = "LABEL=" + DISK_LABEL + "\t/home\tbtrfs\tdefaults\t0\t0"
with open("/etc/fstab", "rt") as fstab:
for line in fstab:
if "/home" in line:
# re.findall() returns a list of strings, get the first one
old_home_uuid = re.findall(r"UUID=([A-Za-z0-9\-]+)", line)[0]
new_fstab += "#" + line
new_fstab += new_home_line
else:
new_fstab += line
new_fstab += "\n"
# Save the new fstab to a tempfile and use sudo cp to overwrite /etc/fstab
fd, path = tempfile.mkstemp()
try:
with os.fdopen(fd, "wt") as tmp:
tmp.write(new_fstab)
finally:
command = ["sudo", "cp", "-f", path, "/etc/fstab"]
result = _run(command)
os.remove(path)
return old_home_uuid
class Mount:
"""Describe a mount with source, destination, and options"""
mount_template = \
Template("[Unit]\nDescription=Mount point for persistent workspace\n" +
"Before=local-fs.target\n\n[Mount]\nWhat=$what\n" +
"Where=$where\nType=$type\nOptions=$options\n\n[Install]\n" +
"WantedBy=default.target\n")
def __init__(self, source, destination, mtype, options, filename):
"""Initializer"""
self.source = source
self.destination = destination
self.mtype = mtype
self.options = options
# call systemd-escape --suffix mount -p self.destination
self.filename = filename
def get_mount_file(self):
return self.mount_template.substitute(what=self.source,
where=self.destination,
type=self.mtype,
options=self.options)
def systemd_mount_files(old_home_uuid):
"""Create systemd mount files and store them at systemd_path"""
systemd_path = "/etc/systemd/system"
old_opt = Mount("/OLDopt", "/run/media/root/opt", "none", "bind", "run-media-root-opt.mount")
old_home = Mount("UUID=" + old_home_uuid, "/run/media/root/home", "btrfs", "defaults", "run-media-root-home.mount")
new_opt = Mount("/home/opt", "/opt", "none", "rbind", "opt.mount")
for mount in old_opt, old_home, new_opt:
# Save to a tempfile and use sudo cp to move it to /etc/systemd
tmpfd, tmppath = tempfile.mkstemp()
try:
with os.fdopen(tmpfd, "wt") as tmp:
tmp.write(mount.get_mount_file())
finally:
mountpath = systemd_path + "/" + mount.filename
command = ["sudo", "cp", "-f", tmppath, mountpath]
result = _run(command)
os.remove(tmppath)
command = ["sudo", "systemctl", "enable", mount.filename]
result = _run(command)
def prepare_opt():
"""Move /opt to /OLDopt and make a new /opt"""
command = ["sudo", "mv", "/opt", "/OLDopt"]
result = _run(command)
command = ["sudo", "mkdir", "/opt"]
result = _run(command)
def main():
"""good old main"""
old_home_uuid = ""
parser = argparse.ArgumentParser()
parser.add_argument("-i", "--init",
help="Initialize a new disk for persistent workspace",
action="store_true")
parser.add_argument("disk", help="Path to disk device node, e.g. /dev/vdb", type=str)
args = parser.parse_args()
disk = Disk(args.disk, DISK_LABEL)
if args.init:
disk.initialize()
old_home_uuid = update_fstab()
systemd_mount_files(old_home_uuid)
prepare_opt()
print("\n\nPlease reboot the SDK for the changes to take effect.")
if __name__ == "__main__":
main()
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