248 lines
10 KiB
Python
248 lines
10 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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from oslo_concurrency import processutils
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from oslo_log import log as logging
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from oslo_utils import excutils
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import six
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from cinder import exception
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from cinder.i18n import _, _LE
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from cinder import ssh_utils
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from cinder import utils
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from cinder.zonemanager.drivers.brocade import brcd_fabric_opts as fabric_opts
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import cinder.zonemanager.drivers.brocade.fc_zone_constants as zone_constant
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from cinder.zonemanager import fc_san_lookup_service as fc_service
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LOG = logging.getLogger(__name__)
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class BrcdFCSanLookupService(fc_service.FCSanLookupService):
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"""The SAN lookup service that talks to Brocade switches.
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Version History:
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1.0.0 - Initial version
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"""
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VERSION = "1.0.0"
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def __init__(self, **kwargs):
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"""Initializing the client."""
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super(BrcdFCSanLookupService, self).__init__(**kwargs)
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self.configuration = kwargs.get('configuration', None)
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self.create_configuration()
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def create_configuration(self):
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"""Configuration specific to SAN context values."""
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config = self.configuration
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fabric_names = [x.strip() for x in config.fc_fabric_names.split(',')]
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LOG.debug('Fabric Names: %s', fabric_names)
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# There can be more than one SAN in the network and we need to
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# get credentials for each for SAN context lookup later.
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if len(fabric_names) > 0:
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self.fabric_configs = fabric_opts.load_fabric_configurations(
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fabric_names)
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def get_device_mapping_from_network(self,
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initiator_wwn_list,
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target_wwn_list):
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"""Provides the initiator/target map for available SAN contexts.
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Looks up nameserver of each fc SAN configured to find logged in devices
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and returns a map of initiator and target port WWNs for each fabric.
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:param initiator_wwn_list: List of initiator port WWN
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:param target_wwn_list: List of target port WWN
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:returns List -- device wwn map in following format
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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 connection to fabric is failed
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"""
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device_map = {}
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formatted_target_list = []
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formatted_initiator_list = []
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fabric_map = {}
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fabric_names = self.configuration.fc_fabric_names
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fabrics = None
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if not fabric_names:
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raise exception.InvalidParameterValue(
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err=_("Missing Fibre Channel SAN configuration "
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"param - fc_fabric_names"))
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fabrics = [x.strip() for x in fabric_names.split(',')]
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LOG.debug("FC Fabric List: %s", fabrics)
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if fabrics:
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for t in target_wwn_list:
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formatted_target_list.append(self.get_formatted_wwn(t))
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for i in initiator_wwn_list:
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formatted_initiator_list.append(self.
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get_formatted_wwn(i))
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for fabric_name in fabrics:
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fabric_ip = self.fabric_configs[fabric_name].safe_get(
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'fc_fabric_address')
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fabric_user = self.fabric_configs[fabric_name].safe_get(
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'fc_fabric_user')
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fabric_pwd = self.fabric_configs[fabric_name].safe_get(
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'fc_fabric_password')
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fabric_port = self.fabric_configs[fabric_name].safe_get(
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'fc_fabric_port')
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ssh_pool = ssh_utils.SSHPool(fabric_ip, fabric_port, None,
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fabric_user, password=fabric_pwd)
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# Get name server data from fabric and find the targets
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# logged in
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nsinfo = ''
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try:
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LOG.debug("Getting name server data for "
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"fabric %s", fabric_ip)
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nsinfo = self.get_nameserver_info(ssh_pool)
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except exception.FCSanLookupServiceException:
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with excutils.save_and_reraise_exception():
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LOG.error(_LE("Failed collecting name server info from"
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" fabric %s"), fabric_ip)
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except Exception as e:
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msg = _("SSH connection failed "
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"for %(fabric)s with error: %(err)s"
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) % {'fabric': fabric_ip, 'err': e}
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LOG.error(msg)
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raise exception.FCSanLookupServiceException(message=msg)
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LOG.debug("Lookup service:nsinfo-%s", nsinfo)
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LOG.debug("Lookup service:initiator list from "
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"caller-%s", formatted_initiator_list)
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LOG.debug("Lookup service:target list from "
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"caller-%s", formatted_target_list)
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visible_targets = filter(lambda x: x in formatted_target_list,
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nsinfo)
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visible_initiators = filter(lambda x: x in
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formatted_initiator_list, nsinfo)
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if visible_targets:
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LOG.debug("Filtered targets is: %s", visible_targets)
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# getting rid of the : before returning
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for idx, elem in enumerate(visible_targets):
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elem = str(elem).replace(':', '')
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visible_targets[idx] = elem
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else:
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LOG.debug("No targets are in the nameserver for SAN %s",
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fabric_name)
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if visible_initiators:
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# getting rid of the : before returning ~sk
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for idx, elem in enumerate(visible_initiators):
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elem = str(elem).replace(':', '')
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visible_initiators[idx] = elem
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else:
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LOG.debug("No initiators are in the nameserver "
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"for SAN %s", fabric_name)
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fabric_map = {
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'initiator_port_wwn_list': visible_initiators,
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'target_port_wwn_list': visible_targets
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}
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device_map[fabric_name] = fabric_map
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LOG.debug("Device map for SAN context: %s", device_map)
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return device_map
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def get_nameserver_info(self, ssh_pool):
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"""Get name server data from fabric.
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This method will return the connected node port wwn list(local
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and remote) for the given switch fabric
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:param ssh_pool: SSH connections for the current fabric
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"""
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cli_output = None
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nsinfo_list = []
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try:
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cli_output = self._get_switch_data(ssh_pool,
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zone_constant.NS_SHOW)
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except exception.FCSanLookupServiceException:
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with excutils.save_and_reraise_exception():
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LOG.error(_LE("Failed collecting nsshow info for fabric"))
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if cli_output:
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nsinfo_list = self._parse_ns_output(cli_output)
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try:
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cli_output = self._get_switch_data(ssh_pool,
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zone_constant.NS_CAM_SHOW)
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except exception.FCSanLookupServiceException:
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with excutils.save_and_reraise_exception():
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LOG.error(_LE("Failed collecting nscamshow"))
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if cli_output:
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nsinfo_list.extend(self._parse_ns_output(cli_output))
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LOG.debug("Connector returning nsinfo-%s", nsinfo_list)
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return nsinfo_list
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def _get_switch_data(self, ssh_pool, cmd):
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utils.check_ssh_injection([cmd])
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with ssh_pool.item() as ssh:
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try:
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switch_data, err = processutils.ssh_execute(ssh, cmd)
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except processutils.ProcessExecutionError as e:
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msg = (_("SSH Command failed with error: '%(err)s', Command: "
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"'%(command)s'") % {'err': six.text_type(e),
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'command': cmd})
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LOG.error(msg)
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raise exception.FCSanLookupServiceException(message=msg)
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return switch_data
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def _parse_ns_output(self, switch_data):
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"""Parses name server data.
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Parses nameserver raw data and adds the device port wwns to the list
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:returns list of device port wwn from ns info
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"""
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nsinfo_list = []
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lines = switch_data.split('\n')
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for line in lines:
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if not(" NL " in line or " N " in line):
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continue
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linesplit = line.split(';')
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if len(linesplit) > 2:
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node_port_wwn = linesplit[2].strip()
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nsinfo_list.append(node_port_wwn)
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else:
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msg = _("Malformed nameserver string: %s") % line
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LOG.error(msg)
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raise exception.InvalidParameterValue(err=msg)
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return nsinfo_list
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def get_formatted_wwn(self, wwn_str):
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"""Utility API that formats WWN to insert ':'."""
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if (len(wwn_str) != 16):
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return wwn_str.lower()
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else:
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return (':'.join([wwn_str[i:i + 2]
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for i in range(0, len(wwn_str), 2)])).lower()
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