cinder.interface.backup_chunked_driver module¶
Backup driver with ‘chunked’ backup operations.
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class
BackupChunkedDriver
¶ Bases:
cinder.interface.backup_driver.BackupDriver
Backup driver that supports ‘chunked’ backups.
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delete_object
(container, object_name)¶ Delete object from container.
- Parameters
container – The container to modify.
object_name – The object name to delete.
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get_container_entries
(container, prefix)¶ Get container entry names.
- Parameters
container – The container from which to get entries.
prefix – The prefix used to match entries.
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get_extra_metadata
(backup, volume)¶ Return extra metadata to use in prepare_backup.
This method allows for collection of extra metadata in prepare_backup() which will be passed to get_object_reader() and get_object_writer(). Subclass extensions can use this extra information to optimize data transfers.
- returns
json serializable object
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get_object_reader
(container, object_name, extra_metadata=None)¶ Returns a reader object for the backed up chunk.
- Parameters
container – The container to read from.
object_name – The object name to read.
extra_metadata – Extra metadata to be included.
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get_object_writer
(container, object_name, extra_metadata=None)¶ Returns a writer which stores the chunk data in backup repository.
- Parameters
container – The container to write to.
object_name – The object name to write.
extra_metadata – Extra metadata to be included.
- Returns
A context handler that can be used in a “with” context.
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put_container
(container)¶ Create the container if needed. No failure if it pre-exists.
- Parameters
container – The container to write into.
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update_container_name
(backup, container)¶ Allows sub-classes to override container name.
This method exists so that sub-classes can override the container name as it comes in to the driver in the backup object. Implementations should return None if no change to the container name is desired.
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