ganeti.storage.filestorage.FileDeviceHelper

class documentation

class FileDeviceHelper(object):

Undocumented

Class Method	`CreateFile`	Create a new file and its file device helper.
Method	`__init__`	Create a new file device helper.
Method	`Exists`	Check for the existence of the given file.
Method	`Grow`	Grow the file
Method	`Move`	Move file to a location inside the file storage dir.
Method	`Remove`	Remove the file backing the block device.
Method	`Size`	Return the actual disk size in bytes.
Instance Variable	`file_path_acceptance_fn`	Undocumented
Instance Variable	`path`	Undocumented

@classmethod
def CreateFile(cls, path, size, create_folders=False, _file_path_acceptance_fn=None): ¶

Create a new file and its file device helper.

Parameters
path	Undocumented
size	the size in MiBs the file should be truncated to.
create_folders	create the directories for the path if necessary (using `ganeti.utils.io.Makedirs`)
_file_path_acceptance_fn	Undocumented
Returns
FileDeviceHelper	The FileDeviceHelper object representing the object.
Raises
`errors.FileStoragePathError`	if the file path is disallowed by policy

def __init__(self, path, _file_path_acceptance_fn=None): ¶

Create a new file device helper.

Raises
`errors.FileStoragePathError`	if the file path is disallowed by policy

def Exists(self, assert_exists=None): ¶

Check for the existence of the given file.

Parameters
assert_exists	creates an assertion on the result value: if true, raise errors.BlockDeviceError if the file doesn't exist if false, raise errors.BlockDeviceError if the file does exist
Returns
boolean	True if the file exists

def Grow(self, amount, dryrun, backingstore, _excl_stor): ¶

Grow the file

Parameters
amount	the amount (in mebibytes) to grow by.
dryrun	Undocumented
backingstore	Undocumented
_excl_stor	Undocumented

def Move(self, new_path): ¶

Move file to a location inside the file storage dir.

def Remove(self): ¶

Remove the file backing the block device.

Returns
boolean	True if the removal was successful

def Size(self): ¶

Return the actual disk size in bytes.

Returns
int	The file size in bytes.

file_path_acceptance_fn = ¶

Undocumented

path = ¶

Undocumented