class RestorationController(ProcessController):
""" The controller used to manage a complete Restoration procedure """
def __init__(self, disk, backup_id, config):
super(RestorationController, self).__init__(disk, backup_id, config)
self.backupset = self._load_backupset()
self._disk_layout = DiskLayout.with_config(self.disk, self.backup_dir, config,
self.backupset.disk_layout)
self._imager = PartitionImage.with_config(self.disk, self.backup_dir,
self.backupset, config)
def _load_backupset(self):
self.backupset = Backupset.load(self.backup_id)
if self.backupset.node == ConfigHelper.config['node']['name']:
return self.backupset
else:
raise Exception('This backup resides on another node, terminating.')
def run(self):
"""
Starts the execution of the backup restoration procedure on a separate thread.
:return: None
"""
self._thread = Thread(target=self._restore)
self._thread.start()
def _init_status(self):
self._status['status'] = constants.STATUS_RUNNING
self._status['operation'] = 'Restoration'
self._status['start_time'] = datetime.today().strftime(constants.DATE_FORMAT)
self._status['path'] = self.backupset.backup_path
self._status['layout'] = self.backupset.disk_layout
def _restore(self):
try:
self._init_status()
if self.backupset.compressed:
self._mount_sqfs()
self._disk_layout.restore_layout()
self._imager.restore()
self._status['status'] = constants.STATUS_FINISHED
except Exception as e:
self._set_error(e)
if self.backupset.compressed:
self._imager.kill()
finally:
self._status['end_time'] = datetime.today().strftime(constants.DATE_FORMAT)
if self.backupset.compressed:
self._umount_sqfs()
def _mount_sqfs(self):
self.squash_wrapper = SquashfsWrapper(self.backupset)
self.squash_wrapper.mount()
def _umount_sqfs(self):
if self.squash_wrapper:
if self.squash_wrapper.mounted:
self.squash_wrapper.umount()
def _squashfs_mount(self):
if not self.squash_wrapper and self.backupset.compressed:
self.squash_wrapper = SquashfsWrapper(self.backupset)
self.squash_wrapper.mount()
class MountController(BasicController):
""" The controller used to manage mounting and unmounting procedures """
NODE_POOL = NBDPool
def __init__(self, backup_id):
super(MountController, self).__init__(backup_id)
self.nodes = []
self.backupset = Backupset.load(backup_id)
self.squash_wrapper = None
self.mount_path = ConfigHelper.config['node']['mount_path'] + self.backupset.id + '/'
def mount(self):
"""
Creates the necessary directory structures and system links,
followed by mounting of the backup.
:return: None
"""
try:
self._squashfs_mount()
create_dir(self.mount_path)
self._mount_partitions()
self._status['status'] = constants.STATUS_RUNNING
if not self._is_mounted_correctly():
self._release_nodes()
delete_dir(self.mount_path)
self._squashfs_umount()
except:
self._squashfs_umount()
raise
def unmount(self):
"""
Unmounts the backup followed by clean up of the directories
and system links created by backup function.
:return: None
"""
try:
self._release_nodes()
delete_dir(self.mount_path)
except:
raise
finally:
self._squashfs_umount()
def _squashfs_mount(self):
if not self.squash_wrapper and self.backupset.compressed:
self.squash_wrapper = SquashfsWrapper(self.backupset)
self.squash_wrapper.mount()
def _squashfs_umount(self):
if self.backupset.compressed and self.squash_wrapper and self.squash_wrapper.mounted:
self.squash_wrapper.umount()
def _mount_partitions(self):
for partition in self.backupset.partitions:
node = self.NODE_POOL.acquire()
image_path = self._get_image_path(partition)
image_mount_path = self._get_image_mount_path(partition)
create_dir(image_mount_path)
node.mount(image_path, partition.file_system, image_mount_path)
self.nodes.append(node)
def _get_image_path(self, partition):
return self.backupset.backup_path + constants.PARTITION_FILE_PREFIX + partition.id + \
constants.PARTITION_FILE_SUFFIX
def _get_image_mount_path(self, partition):
return self.mount_path + constants.PARTITION_FILE_PREFIX + partition.id + '/'
def _is_mounted_correctly(self):
error_detected = False
for node in self.nodes:
if node.error and not error_detected:
error_detected = True
self._set_error("Error detected duirng the mount operation on backup " +
str(self.backupset.id))
return not error_detected
def _release_nodes(self):
for node in self.nodes:
node.unmount()
self.NODE_POOL.release(node)
del self.nodes[:]
def _mount_sqfs(self):
self.squash_wrapper = SquashfsWrapper(self.backupset)
self.squash_wrapper.mount()
def _squashfs_mount(self):
if not self.squash_wrapper and self.backupset.compressed:
self.squash_wrapper = SquashfsWrapper(self.backupset)
self.squash_wrapper.mount()
class MountController(BasicController):
""" The controller used to manage mounting and unmounting procedures """
NODE_POOL = NBDPool
def __init__(self, backup_id):
super(MountController, self).__init__(backup_id)
self.nodes = []
self.backupset = Backupset.load(backup_id)
self.squash_wrapper = None
self.mount_path = ConfigHelper.config['node'][
'mount_path'] + self.backupset.id + '/'
def mount(self):
"""
Creates the necessary directory structures and system links,
followed by mounting of the backup.
:return: None
"""
try:
self._squashfs_mount()
create_dir(self.mount_path)
self._mount_partitions()
self._status['status'] = constants.STATUS_RUNNING
if not self._is_mounted_correctly():
self._release_nodes()
delete_dir(self.mount_path)
self._squashfs_umount()
except:
self._squashfs_umount()
raise
def unmount(self):
"""
Unmounts the backup followed by clean up of the directories
and system links created by backup function.
:return: None
"""
try:
self._release_nodes()
delete_dir(self.mount_path)
except:
raise
finally:
self._squashfs_umount()
def _squashfs_mount(self):
if not self.squash_wrapper and self.backupset.compressed:
self.squash_wrapper = SquashfsWrapper(self.backupset)
self.squash_wrapper.mount()
def _squashfs_umount(self):
if self.backupset.compressed and self.squash_wrapper and self.squash_wrapper.mounted:
self.squash_wrapper.umount()
def _mount_partitions(self):
for partition in self.backupset.partitions:
node = self.NODE_POOL.acquire()
image_path = self._get_image_path(partition)
image_mount_path = self._get_image_mount_path(partition)
create_dir(image_mount_path)
node.mount(image_path, partition.file_system, image_mount_path)
self.nodes.append(node)
def _get_image_path(self, partition):
return self.backupset.backup_path + constants.PARTITION_FILE_PREFIX + partition.id + \
constants.PARTITION_FILE_SUFFIX
def _get_image_mount_path(self, partition):
return self.mount_path + constants.PARTITION_FILE_PREFIX + partition.id + '/'
def _is_mounted_correctly(self):
error_detected = False
for node in self.nodes:
if node.error and not error_detected:
error_detected = True
self._set_error(
"Error detected duirng the mount operation on backup " +
str(self.backupset.id))
return not error_detected
def _release_nodes(self):
for node in self.nodes:
node.unmount()
self.NODE_POOL.release(node)
del self.nodes[:]
def _mount_sqfs(self):
self.squash_wrapper = SquashfsWrapper(self.backupset)
self.squash_wrapper.mount()
class RestorationController(ProcessController):
""" The controller used to manage a complete Restoration procedure """
def __init__(self, disk, backup_id, config):
super(RestorationController, self).__init__(disk, backup_id, config)
self.backupset = self._load_backupset()
self._disk_layout = DiskLayout.with_config(self.disk, self.backup_dir,
config,
self.backupset.disk_layout)
self._imager = PartitionImage.with_config(self.disk, self.backup_dir,
self.backupset, config)
def _load_backupset(self):
self.backupset = Backupset.load(self.backup_id)
if self.backupset.node == ConfigHelper.config['node']['name']:
return self.backupset
else:
raise Exception(
'This backup resides on another node, terminating.')
def run(self):
"""
Starts the execution of the backup restoration procedure on a separate thread.
:return: None
"""
self._thread = Thread(target=self._restore)
self._thread.start()
def _init_status(self):
self._status['status'] = constants.STATUS_RUNNING
self._status['operation'] = 'Restoration'
self._status['start_time'] = datetime.today().strftime(
constants.DATE_FORMAT)
self._status['path'] = self.backupset.backup_path
self._status['layout'] = self.backupset.disk_layout
def _restore(self):
try:
self._init_status()
if self.backupset.compressed:
self._mount_sqfs()
self._disk_layout.restore_layout()
self._imager.restore()
self._status['status'] = constants.STATUS_FINISHED
except Exception as e:
self._set_error(e)
if self.backupset.compressed:
self._imager.kill()
finally:
self._status['end_time'] = datetime.today().strftime(
constants.DATE_FORMAT)
if self.backupset.compressed:
self._umount_sqfs()
def _mount_sqfs(self):
self.squash_wrapper = SquashfsWrapper(self.backupset)
self.squash_wrapper.mount()
def _umount_sqfs(self):
if self.squash_wrapper:
if self.squash_wrapper.mounted:
self.squash_wrapper.umount()
