05827810ca
Currently, when creating an encrypted volume from an image, Cinder writes raw data to the encrypted volume. When Cinder uploads an encrypted volume to an image, it writes encrypted data to the image. As a result, Nova cannot use these images or volumes. To fix above problem, cinder needs to add encryptor attach/detach layers. As both Nova and Cinder needs to use the module, the fix is to move it to os-brick. It copies encryptors from Nova to os-brick, and keep all interfaces unchanged except initialization. Change-Id: I8044183ad02110c8b2468e20327d822c0437c772 Implements: blueprint improve-encrypted-volume Related-bug: #1482464 Related-bug: #1465656
100 lines
3.9 KiB
Python
100 lines
3.9 KiB
Python
# Copyright (c) 2013 The Johns Hopkins University/Applied Physics Laboratory
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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from os_brick.encryptors import nop
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from os_brick.i18n import _LE, _LW
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from oslo_log import log as logging
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from oslo_utils import importutils
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from oslo_utils import strutils
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LOG = logging.getLogger(__name__)
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def get_volume_encryptor(root_helper,
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connection_info,
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keymgr,
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execute=None,
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*args, **kwargs):
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"""Creates a VolumeEncryptor used to encrypt the specified volume.
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:param: the connection information used to attach the volume
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:returns VolumeEncryptor: the VolumeEncryptor for the volume
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"""
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encryptor = nop.NoOpEncryptor(root_helper=root_helper,
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connection_info=connection_info,
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keymgr=keymgr,
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execute=execute,
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*args, **kwargs)
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location = kwargs.get('control_location', None)
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if location and location.lower() == 'front-end': # case insensitive
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provider = kwargs.get('provider')
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if provider == 'LuksEncryptor' or 'LuksEncryptor' in provider:
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provider = 'os_brick.encryptors.luks.LuksEncryptor'
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elif (provider == 'CryptsetupEncryptor' or
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'CryptsetupEncryptor' in provider):
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provider = \
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'os_brick.encryptors.cryptsetup.CryptsetupEncryptor'
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elif (provider == 'NoOpEncryptor' or 'NoOpEncryptor' in provider):
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provider = 'os_brick.encryptors.nop.NoOpEncryptor'
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try:
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encryptor = importutils.import_object(
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provider,
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root_helper,
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connection_info,
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keymgr,
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execute,
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**kwargs)
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except Exception as e:
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LOG.error(_LE("Error instantiating %(provider)s: %(exception)s"),
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{'provider': provider, 'exception': e})
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raise
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msg = ("Using volume encryptor '%(encryptor)s' for connection: "
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"%(connection_info)s" %
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{'encryptor': encryptor, 'connection_info': connection_info})
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LOG.debug(strutils.mask_password(msg))
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return encryptor
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def get_encryption_metadata(context, volume_api, volume_id, connection_info):
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metadata = {}
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if ('data' in connection_info and
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connection_info['data'].get('encrypted', False)):
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try:
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metadata = volume_api.get_volume_encryption_metadata(context,
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volume_id)
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if not metadata:
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LOG.warning(_LW(
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'Volume %s should be encrypted but there is no '
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'encryption metadata.'), volume_id)
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except Exception as e:
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LOG.error(_LE("Failed to retrieve encryption metadata for "
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"volume %(volume_id)s: %(exception)s"),
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{'volume_id': volume_id, 'exception': e})
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raise
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if metadata:
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msg = ("Using volume encryption metadata '%(metadata)s' for "
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"connection: %(connection_info)s" %
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{'metadata': metadata, 'connection_info': connection_info})
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LOG.debug(strutils.mask_password(msg))
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return metadata
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