The nova.block_device
Module¶
-
class
BlockDeviceDict
(bdm_dict=None, do_not_default=None, **kwargs)¶ Bases:
dict
Represents a Block Device Mapping in Nova.
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classmethod
from_api
(api_dict, image_uuid_specified)¶ Transform the API format of data to the internally used one.
Only validate if the source_type field makes sense.
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classmethod
from_legacy
(legacy_bdm)¶
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get_image_mapping
()¶
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legacy
()¶
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classmethod
-
create_blank_bdm
(size, guest_format=None)¶
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create_image_bdm
(image_ref, boot_index=0)¶ Create a block device dict based on the image_ref.
This is useful in the API layer to keep the compatibility with having an image_ref as a field in the instance requests
-
ephemeral_num
(ephemeral_name)¶
-
from_legacy_mapping
(legacy_block_device_mapping, image_uuid='', root_device_name=None, no_root=False)¶ Transform a legacy list of block devices to the new data format.
-
get_bdm_ephemeral_disk_size
(block_device_mappings)¶
-
get_bdm_local_disk_num
(block_device_mappings)¶
-
get_bdm_swap_list
(block_device_mappings)¶
-
get_bdms_to_connect
(bdms, exclude_root_mapping=False)¶ Will return non-root mappings, when exclude_root_mapping is true. Otherwise all mappings will be returned.
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get_device_letter
(device_name)¶
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get_root_bdm
(bdms)¶
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instance_block_mapping
(instance, bdms)¶
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is_ephemeral
(device_name)¶
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is_safe_for_update
(block_device_dict)¶ Determine if passed dict is a safe subset for update.
Safe subset in this case means a safe subset of both legacy and new versions of data, that can be passed to an UPDATE query without any transformation.
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is_swap_or_ephemeral
(device_name)¶
-
legacy_mapping
(block_device_mapping)¶ Transform a list of block devices of an instance back to the legacy data format.
-
mappings_prepend_dev
(mappings)¶ Prepend ‘/dev/’ to ‘device’ entry of swap/ephemeral virtual type.
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match_device
(device)¶ Matches device name and returns prefix, suffix.
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new_format_is_ephemeral
(bdm)¶
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new_format_is_swap
(bdm)¶
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prepend_dev
(device_name)¶ Make sure there is a leading ‘/dev/’.
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properties_root_device_name
(properties)¶ get root device name from image meta data. If it isn’t specified, return None.
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snapshot_from_bdm
(snapshot_id, template)¶ Create a basic volume snapshot BDM from a given template bdm.
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strip_dev
(device_name)¶ remove leading ‘/dev/’.
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strip_prefix
(device_name)¶ remove both leading /dev/ and xvd or sd or vd or hd.
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validate_and_default_volume_size
(bdm)¶
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validate_device_name
(value)¶
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volume_in_mapping
(mount_device, block_device_info)¶