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# vim: tabstop=4 shiftwidth=4 softtabstop=4
# Copyright (c) 2013 The Johns Hopkins University/Applied Physics Laboratory
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
from nova.openstack.common.gettextutils import _
from nova.openstack.common import importutils
from nova.openstack.common import log as logging
from nova.volume.encryptors import nop
LOG = logging.getLogger(__name__)
def get_volume_encryptor(connection_info, **kwargs):
"""Creates a VolumeEncryptor used to encrypt the specified volume.
:param: the connection information used to attach the volume
:returns VolumeEncryptor: the VolumeEncryptor for the volume
"""
encryptor = nop.NoOpEncryptor(connection_info, **kwargs)
location = kwargs.get('control_location', None)
if location and location.lower() == 'front-end': # case insensitive
provider = kwargs.get('provider')
try:
encryptor = importutils.import_object(provider, connection_info,
**kwargs)
except Exception as e:
LOG.error(_("Error instantiating %(provider)s: %(exception)s"),
provider=provider, exception=e)
raise
return encryptor
def get_encryption_metadata(context, volume_api, volume_id, connection_info):
metadata = {}
if ('data' in connection_info and
connection_info['data'].get('encrypted', False)):
try:
metadata = volume_api.get_volume_encryption_metadata(context,
volume_id)
except Exception as e:
LOG.error(_("Failed to retrieve encryption metadata for "
"volume %(volume_id)s: %(exception)s"),
{'volume_id': volume_id, 'exception': e})
raise
return metadata
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