/usr/lib/python3/dist-packages/backup2swift/backup.py is in python3-backup2swift 0.8-1.
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"""
Copyright (C) 2013 Kouhei Maeda <mkouhei@palmtb.net>
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 3 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 General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
"""
import os.path
import glob
import sys
from datetime import datetime
from swiftsc import client
from backup2swift import utils
ROTATE_LIMIT = 10
class Backup(object):
def __init__(self, auth_url, username, password, rotate_limit=ROTATE_LIMIT,
verify=True, tenant_id=None, container_name=utils.FQDN):
self.verify = verify
(self.token,
self.storage_url) = client.retrieve_token(auth_url,
username,
password,
tenant_id,
verify=self.verify)
if isinstance(rotate_limit, str):
self.rotate_limit = int(rotate_limit)
else:
self.rotate_limit = rotate_limit
self.container_name = container_name
def backup(self, target_path):
"""
Argument:
target_path: path of backup target file or directory
"""
if isinstance(target_path, list):
# for multiple arguments
[utils.multiprocess(self.backup, path) for path in target_path]
elif os.path.isdir(target_path):
[utils.multiprocess(self.backup_file, f)
for f in glob.glob(os.path.join(target_path, '*'))]
elif os.path.isfile(target_path):
self.backup_file(target_path)
return True
def backup_file(self, filename, data=None):
"""
Argument:
filename: path of backup target file
data: backup target file content from stdin pipe
"""
object_name = os.path.basename(filename)
if not client.is_container(self.token, self.storage_url,
self.container_name, verify=self.verify):
# False is no container
rc = client.create_container(self.token,
self.storage_url,
self.container_name,
verify=self.verify)
if not (rc == 201 or rc == 202):
# 201; Created, 202; Accepted
raise RuntimeError('Failed to create the container "%s"'
% self.container_name, verify=self.verify)
objects_list = [object.get('name') for object in
client.list_objects(self.token,
self.storage_url,
self.container_name,
verify=self.verify)]
if filename and data:
# from stdin pipe
object_name = filename
filename = data
if object_name in objects_list:
self.rotate(filename, object_name, objects_list)
else:
rc = client.create_object(self.token,
self.storage_url,
self.container_name,
filename,
object_name=object_name,
verify=self.verify)
if not (rc == 201 or rc == 202):
raise RuntimeError('Failed to create the object "%s"'
% object_name)
return True
def rotate(self, filename, object_name, objects_list):
"""
Arguments:
filename: filename of backup target
object_name: name of object on Swift
objects_list: list of objects on Swift
"""
# copy current object to new object
timestamp = datetime.now().strftime("%Y%m%d-%H%M%S")
new_object_name = object_name + '_' + timestamp
rc = client.copy_object(self.token, self.storage_url,
self.container_name, object_name,
new_object_name, verify=self.verify)
if rc != 201:
raise RuntimeError('Failed to copy object "%s"' % new_object_name)
# create new object
rc = client.create_object(self.token, self.storage_url,
self.container_name, filename,
object_name=object_name,
verify=self.verify)
if rc != 201:
raise RuntimeError('Failed to create the object "%s"'
% object_name)
# delete old objects
archive_list = [obj for obj in objects_list
if obj.startswith(object_name + '_')]
archive_list.reverse()
[utils.multiprocess(client.delete_object, self.token,
self.storage_url, self.container_name,
obj, verify=self.verify)
for i, obj in enumerate(archive_list)
if i + 1 > self.rotate_limit - 1]
return True
def retrieve_backup_data_list(self, verbose=False):
"""
Argument:
verbose: boolean flag of listing objects
"""
if not client.is_container(self.token, self.storage_url,
self.container_name, verify=self.verify):
return []
if verbose:
backup_l = [i for i in client.list_objects(self.token,
self.storage_url,
self.container_name,
verify=self.verify)]
else:
backup_l = [i.get('name') for i
in client.list_objects(self.token,
self.storage_url,
self.container_name,
verify=self.verify)]
return backup_l
def retrieve_backup_data(self, object_name, output_filepath=None):
"""
Argument:
object_name: delete target object name
"""
if isinstance(object_name, list):
# for retrieve multiple objects
output_filepath = None
[utils.multiprocess(self.retrieve_backup_data, obj)
for obj in object_name]
elif (client.is_container(self.token, self.storage_url,
self.container_name, verify=self.verify) and
client.is_object(self.token, self.storage_url,
self.container_name, object_name,
verify=self.verify)):
rc, content = client.retrieve_object(self.token,
self.storage_url,
self.container_name,
object_name,
verify=self.verify)
if not rc:
raise RuntimeError('Failed to retrieve the object "%s"'
% object_name)
if output_filepath:
fpath = os.path.abspath(output_filepath)
dpath = os.path.dirname(fpath)
if not os.path.isdir(dpath):
raise IOError('No such directory "%s"' % dpath)
else:
dpath = os.path.abspath(os.curdir)
fpath = os.path.join(dpath, object_name)
if sys.version_info > (3, 0) and isinstance(content, bytes):
mode = 'bw'
else:
mode = 'w'
with open(fpath, mode) as f:
f.write(content)
else:
raise RuntimeError('No such object "%s"' % object_name)
def delete_backup_data(self, object_name):
"""
Argument:
object_name: delete target object name
"""
if isinstance(object_name, list):
# for multiple arguments
[self.delete_backup_data(obj) for obj in object_name]
elif (client.is_container(self.token, self.storage_url,
self.container_name, verify=self.verify) and
client.is_object(self.token, self.storage_url,
self.container_name, object_name,
verify=self.verify)):
rc = client.delete_object(self.token,
self.storage_url,
self.container_name,
object_name,
verify=self.verify)
if not rc == 204:
raise RuntimeError('Failed to delete the object "%s"'
% object_name)
return True
else:
raise RuntimeError('No such object "%s"' % object_name)
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