98 lines
3.5 KiB
Python
98 lines
3.5 KiB
Python
# (c) Copyright 2014 Brocade Communications Systems Inc.
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# All Rights Reserved.
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#
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# Copyright 2014 OpenStack Foundation
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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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#
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"""
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Base Lookup Service for name server lookup to find the initiator to target port
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mapping for available SAN contexts.
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Vendor specific lookup classes are expected to implement the interfaces
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defined in this class.
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"""
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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 cinder import exception
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from cinder.i18n import _
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from cinder.volume import configuration as config
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from cinder.zonemanager import fc_common
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from cinder.zonemanager import fc_zone_manager
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LOG = logging.getLogger(__name__)
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class FCSanLookupService(fc_common.FCCommon):
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"""Base Lookup Service.
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Base Lookup Service for name server lookup to find the initiator to
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target port mapping for available SAN contexts.
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"""
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lookup_service = None
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def __init__(self, **kwargs):
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super(FCSanLookupService, self).__init__(**kwargs)
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opts = fc_zone_manager.zone_manager_opts
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self.configuration = config.Configuration(opts, 'fc-zone-manager')
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def get_device_mapping_from_network(self, initiator_list, target_list):
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"""Get device mapping from FC network.
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Gets a filtered list of initiator ports and target ports for each SAN
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available.
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:param initiator_list: list of initiator port WWN
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:param target_list: list of target port WWN
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:returns: device wwn map in following format
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.. code-block:: python
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{
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<San name>: {
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'initiator_port_wwn_list':
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('200000051E55A100', '200000051E55A121'..)
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'target_port_wwn_list':
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('100000051E55A100', '100000051E55A121'..)
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}
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}
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:raises Exception: when a lookup service implementation is not
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specified in cinder.conf:fc_san_lookup_service
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"""
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# Initialize vendor specific implementation of FCZoneDriver
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if (self.configuration.fc_san_lookup_service):
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lookup_service = self.configuration.fc_san_lookup_service
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LOG.debug("Lookup service to invoke: "
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"%s", lookup_service)
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self.lookup_service = importutils.import_object(
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lookup_service, configuration=self.configuration)
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else:
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msg = _("Lookup service not configured. Config option for "
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"fc_san_lookup_service needs to specify a concrete "
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"implementation of the lookup service.")
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LOG.error(msg)
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raise exception.FCSanLookupServiceException(msg)
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try:
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device_map = self.lookup_service.get_device_mapping_from_network(
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initiator_list, target_list)
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except Exception as e:
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LOG.exception('Unable to get device mapping from network.')
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raise exception.FCSanLookupServiceException(e)
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return device_map
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