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manager/qubesmanager/restore.py
Marta Marczykowska-Górecka 7a4e4b35d5
Initial backup-and-restore GUI restoration 
Initial restoration: basic backup-and-restore works, but
- progress bar in backup does not work
- selecting only some VMs to restore does not work
- various miscellaneous enhancements are not yet in place
2017-12-10 21:14:14 +01:00

373 lines
14 KiB
Python
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#!/usr/bin/python2
# pylint: skip-file
#
# The Qubes OS Project, http://www.qubes-os.org
#
# Copyright (C) 2012 Agnieszka Kostrzewa <agnieszka.kostrzewa@gmail.com>
# Copyright (C) 2012 Marek Marczykowski <marmarek@mimuw.edu.pl>
#
# 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.
#
# You should have received a copy of the GNU Lesser General Public License along
# with this program; if not, see <http://www.gnu.org/licenses/>.
#
#
import sys
import os
import shutil
from PyQt4.QtCore import *
from PyQt4.QtGui import *
from .thread_monitor import *
import time
import os.path
import traceback
import qubesmanager.resources_rc
import signal
from qubes import backup
from .ui_restoredlg import *
from .multiselectwidget import *
from .backup_utils import *
from multiprocessing import Queue, Event
from multiprocessing.queues import Empty
from qubesadmin import Qubes, events, exc
from qubesadmin import utils as admin_utils
from qubesadmin.backup import restore
class RestoreVMsWindow(Ui_Restore, QWizard):
__pyqtSignals__ = ("restore_progress(int)", "backup_progress(int)")
def __init__(self, app, qvm_collection, parent=None):
super(RestoreVMsWindow, self).__init__(parent)
self.app = app
self.qvm_collection = qvm_collection
self.restore_options = None
self.vms_to_restore = None
self.func_output = []
self.feedback_queue = Queue()
self.canceled = False
self.tmpdir_to_remove = None
self.error_detected = Event()
self.excluded = {}
self.setupUi(self)
self.select_vms_widget = MultiSelectWidget(self)
self.select_vms_layout.insertWidget(1, self.select_vms_widget)
self.connect(self,
SIGNAL("currentIdChanged(int)"), self.current_page_changed)
self.connect(self,
SIGNAL("restore_progress(QString)"),
self.commit_text_edit.append)
self.connect(self,
SIGNAL("backup_progress(int)"), self.progress_bar.setValue)
self.dir_line_edit.connect(self.dir_line_edit,
SIGNAL("textChanged(QString)"),
self.backup_location_changed)
self.connect(self.verify_only, SIGNAL("stateChanged(int)"),
self.on_verify_only_toogled)
self.select_dir_page.isComplete = self.has_selected_dir
self.select_vms_page.isComplete = self.has_selected_vms
self.confirm_page.isComplete = self.all_vms_good
# FIXME
# this causes to run isComplete() twice, I don't know why
self.select_vms_page.connect(
self.select_vms_widget,
SIGNAL("selected_changed()"),
SIGNAL("completeChanged()"))
fill_appvms_list(self)
# self.__init_restore_options__()
@pyqtSlot(name='on_select_path_button_clicked')
def select_path_button_clicked(self):
select_path_button_clicked(self, True)
def on_ignore_missing_toggled(self, checked):
self.restore_options['use-default-template'] = checked
self.restore_options['use-default-netvm'] = checked
def on_ignore_uname_mismatch_toggled(self, checked):
self.restore_options['ignore-username-mismatch'] = checked
def on_verify_only_toogled(self, checked):
self.restore_options['verify-only'] = bool(checked)
def cleanupPage(self, p_int):
if self.page(p_int) is self.select_vms_page:
self.vms_to_restore = None
else:
super(RestoreVMsWindow, self).cleanupPage(p_int)
def __fill_vms_list__(self):
if self.vms_to_restore is not None:
return
self.select_vms_widget.selected_list.clear()
self.select_vms_widget.available_list.clear()
self.target_appvm = None # TODO: what is the purpose of this
if self.appvm_combobox.currentIndex() != 0: # An existing appvm chosen
self.target_appvm = self.qvm_collection.domains[
str(self.appvm_combobox.currentText())]
try:
self.backup_restore = restore.BackupRestore(
self.qvm_collection,
self.dir_line_edit.text(),
self.target_appvm,
self.passphrase_line_edit.text()
)
# TODO: change text of ignore missing to ignore
# missing templates and netvms
if self.ignore_missing.isChecked():
self.backup_restore.options.use_default_template = True
self.backup_restore.options.use_default_netvm = True
if self.ignore_uname_mismatch.isChecked():
self.backup_restore.options.ignore_username_mismatch = True
if self.verify_only.isChecked():
self.backup_restore.options.verify_only = True
self.vms_to_restore = self.backup_restore.get_restore_info()
for vmname in self.vms_to_restore:
if vmname.startswith('$'):
# Internal info
continue
self.select_vms_widget.available_list.addItem(vmname)
except exc.QubesException as ex:
QMessageBox.warning(None, self.tr("Restore error!"), str(ex))
def gather_output(self, s):
self.func_output.append(s)
def restore_error_output(self, s):
self.error_detected.set()
self.feedback_queue.put((SIGNAL("restore_progress(QString)"),
u'<font color="red">{0}</font>'.format(s)))
def restore_output(self, s):
self.feedback_queue.put((SIGNAL("restore_progress(QString)"),
u'<font color="black">{0}</font>'.format(s)))
def update_progress_bar(self, value):
self.feedback_queue.put((SIGNAL("backup_progress(int)"), value))
def __do_restore__(self, thread_monitor):
err_msg = []
try:
self.backup_restore.progress_callback = self.update_progress_bar
self.backup_restore.restore_do(self.vms_to_restore)
except backup.BackupCanceledError as ex:
self.canceled = True
self.tmpdir_to_remove = ex.tmpdir
err_msg.append(str(ex))
except Exception as ex:
err_msg.append(str(ex))
err_msg.append(
self.tr("Partially restored files left in /var/tmp/restore_*, "
"investigate them and/or clean them up"))
if self.canceled:
self.emit(SIGNAL("restore_progress(QString)"),
'<b><font color="red">{0}</font></b>'
.format(self.tr("Restore aborted!")))
elif len(err_msg) > 0 or self.error_detected.is_set():
if len(err_msg) > 0:
thread_monitor.set_error_msg('\n'.join(err_msg))
self.emit(SIGNAL("restore_progress(QString)"),
'<b><font color="red">{0}</font></b>'
.format(self.tr("Finished with errors!")))
else:
self.emit(SIGNAL("restore_progress(QString)"),
'<font color="green">{0}</font>'
.format(self.tr("Finished successfully!")))
thread_monitor.set_finished()
def current_page_changed(self, id):
old_sigchld_handler = signal.signal(signal.SIGCHLD, signal.SIG_DFL)
if self.currentPage() is self.select_vms_page:
self.__fill_vms_list__()
elif self.currentPage() is self.confirm_page:
for v in self.excluded:
self.vms_to_restore[v] = self.excluded[v]
self.excluded = {}
for i in range(self.select_vms_widget.available_list.count()):
vmname = self.select_vms_widget.available_list.item(i).text()
self.excluded[str(vmname)] = self.vms_to_restore[str(vmname)]
del self.vms_to_restore[str(vmname)]
del self.func_output[:]
# TODO: am I ignoring changes made by user?
self.vms_to_restore = self.backup_restore.restore_info_verify(
self.backup_restore.get_restore_info())
self.func_output = self.backup_restore.get_restore_summary(
self.backup_restore.get_restore_info()
)
self.confirm_text_edit.setReadOnly(True)
self.confirm_text_edit.setFontFamily("Monospace")
self.confirm_text_edit.setText(self.func_output)
self.confirm_page.emit(SIGNAL("completeChanged()"))
elif self.currentPage() is self.commit_page:
self.button(self.FinishButton).setDisabled(True)
self.showFileDialog.setEnabled(True)
self.showFileDialog.setChecked(self.showFileDialog.isEnabled()
and str(self.dir_line_edit.text())
.count("media/") > 0)
self.thread_monitor = ThreadMonitor()
thread = threading.Thread (target= self.__do_restore__ , args=(self.thread_monitor,))
thread.daemon = True
thread.start()
while not self.thread_monitor.is_finished():
self.app.processEvents()
time.sleep (0.1)
try:
for (signal_to_emit,data) in iter(self.feedback_queue.get_nowait,None):
self.emit(signal_to_emit,data)
except Empty:
pass
if not self.thread_monitor.success:
if self.canceled:
if self.tmpdir_to_remove and \
QMessageBox.warning(None, self.tr("Restore aborted"),
self.tr("Do you want to remove temporary files "
"from %s?") % self.tmpdir_to_remove,
QMessageBox.Yes, QMessageBox.No) == \
QMessageBox.Yes:
shutil.rmtree(self.tmpdir_to_remove)
else:
QMessageBox.warning(None,
self.tr("Backup error!"), self.tr("ERROR: {0}")
.format(self.thread_monitor.error_msg))
if self.showFileDialog.isChecked(): # TODO: this is not working
self.emit(SIGNAL("restore_progress(QString)"),
'<b><font color="black">{0}</font></b>'.format(
self.tr(
"Please unmount your backup volume and cancel"
" the file selection dialog.")))
if self.target_appvm: # TODO does this work at all?
self.target_appvm.run("QUBESRPC %s dom0" %
"qubes.SelectDirectory")
else:
file_dialog = QFileDialog()
file_dialog.setReadOnly(True)
file_dialog.getExistingDirectory(
self, self.tr("Detach backup device"),
os.path.dirname(self.dir_line_edit.text()))
self.progress_bar.setValue(100)
self.button(self.FinishButton).setEnabled(True)
self.button(self.CancelButton).setEnabled(False)
self.showFileDialog.setEnabled(False)
signal.signal(signal.SIGCHLD, old_sigchld_handler)
def all_vms_good(self):
for vm_info in self.vms_to_restore.values():
if not vm_info.vm:
continue
if not vm_info.good_to_go:
return False
return True
def reject(self): # TODO: probably not working too
if self.currentPage() is self.commit_page:
if self.backup_restore.canceled:
self.emit(SIGNAL("restore_progress(QString)"),
'<font color="red">{0}</font>'
.format(self.tr("Aborting the operation...")))
self.button(self.CancelButton).setDisabled(True)
else:
self.done(0)
def has_selected_dir(self):
backup_location = self.dir_line_edit.text()
if not backup_location:
return False
if self.appvm_combobox.currentIndex() == 0:
if os.path.isfile(backup_location) or \
os.path.isfile(os.path.join(backup_location, 'qubes.xml')):
return True
else:
return True
return False
def has_selected_vms(self):
return self.select_vms_widget.selected_list.count() > 0
def backup_location_changed(self, new_dir=None):
self.select_dir_page.emit(SIGNAL("completeChanged()"))
# Bases on the original code by:
# Copyright (c) 2002-2007 Pascal Varet <p.varet@gmail.com>
def handle_exception(exc_type, exc_value, exc_traceback):
filename, line, dummy, dummy = traceback.extract_tb(exc_traceback).pop()
filename = os.path.basename(filename)
error = "%s: %s" % (exc_type.__name__, exc_value)
QMessageBox.critical(None, "Houston, we have a problem...",
"Whoops. A critical error has occured. "
"This is most likely a bug "
"in Qubes Restore VMs application.<br><br>"
"<b><i>%s</i></b>" % error +
"at <b>line %d</b> of file <b>%s</b>.<br/><br/>"
% (line, filename))
def main():
qtapp = QApplication(sys.argv)
qtapp.setOrganizationName("The Qubes Project")
qtapp.setOrganizationDomain("http://qubes-os.org")
qtapp.setApplicationName("Qubes Restore VMs")
sys.excepthook = handle_exception
app = Qubes()
restore_window = RestoreVMsWindow(qtapp, app)
restore_window.show()
qtapp.exec_()
qtapp.exit()
if __name__ == "__main__":
main()
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