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