def rotate(self, filename, object_name, objects_list,
rotate_limit=ROTATE_LIMIT):
"""
Arguments:
filename: filename of backup target
object_name: name of object on Swift
objects_list: list of objects on Swift
rotate_limit: limitation of backup rotation
"""
# 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,
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()
[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 > rotate_limit - 1]
return True
def backup_file(self, filename):
"""
Argument:
filename: path of backup target file
"""
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 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,
verify=self.verify)
if not (rc == 201 or rc == 202):
raise RuntimeError('Failed to create the object "%s"'
% object_name)
return True
