Package ganeti :: Module bdev :: Class FileStorage

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Class FileStorage

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File device.

This class represents the a file storage backend device.

The unique_id for the file device is a (file_driver, file_path) tuple.

Instance Methods

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__init__(self, unique_id, children, size)
Initalizes a file device backend.

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Assemble(self)
Assemble the device.

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Shutdown(self)
Shutdown the device.

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Open(self, force=False)
Make the device ready for I/O.

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Close(self)
Notifies that the device will no longer be used for I/O.

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boolean

Remove(self)
Remove the file backing the block device.

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Rename(self, new_id)
Renames the file.

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Grow(self, amount)
Grow the file

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boolean

Attach(self)
Attach to an existing file.

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GetActualSize(self)
Return the actual disk size.

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Inherited from BlockDev: CombinedSyncStatus, GetSyncStatus, SetInfo, SetSyncSpeed, __repr__

Inherited from object: __delattr__, __format__, __getattribute__, __hash__, __new__, __reduce__, __reduce_ex__, __setattr__, __sizeof__, __str__, __subclasshook__

Class Methods

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bdev.FileStorage

Create(cls, unique_id, children, size)
Create a new file.

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Properties

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Inherited from object: __class__

Method Details

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init(self, unique_id, children, size)
(Constructor)

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Initalizes a file device backend.

Overrides: object.__init__

Assemble(self)

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Assemble the device.

Checks whether the file device exists, raises BlockDeviceError otherwise.

Overrides: BlockDev.Assemble

Shutdown(self)

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Shutdown the device.

This is a no-op for the file type, as we don't deactivate the file on shutdown.

Overrides: BlockDev.Shutdown

Open(self, force=False)

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Make the device ready for I/O.

This is a no-op for the file type.

Overrides: BlockDev.Open

Close(self)

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Notifies that the device will no longer be used for I/O.

This is a no-op for the file type.

Overrides: BlockDev.Close

Remove(self)

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Remove the file backing the block device.

Returns: boolean: True if the removal was successful
Overrides: BlockDev.Remove

Rename(self, new_id)

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Renames the file.

Overrides: BlockDev.Rename

Grow(self, amount)

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Grow the file

Parameters:

amount - the amount (in mebibytes) to grow with

Overrides: BlockDev.Grow

Attach(self)

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Attach to an existing file.

Check if this file already exists.

Returns: boolean: True if file exists
Overrides: BlockDev.Attach

GetActualSize(self)

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Return the actual disk size.

Overrides: BlockDev.GetActualSize

Note: the device needs to be active when this is called

Create(cls, unique_id, children, size)
Class Method

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Create a new file.

Parameters:

size - the size of file in MiB

Returns: bdev.FileStorage

an instance of FileStorage

Overrides: BlockDev.Create

Class FileStorage

__init__(self, unique_id, children, size) (Constructor)

Assemble(self)

Shutdown(self)

Open(self, force=False)

Close(self)

Remove(self)

Rename(self, new_id)

Grow(self, amount)

Attach(self)

GetActualSize(self)

Create(cls, unique_id, children, size) Class Method

init(self, unique_id, children, size)
(Constructor)

Create(cls, unique_id, children, size)
Class Method