cd18537fd6
Host sees VLUN template allows host connected to any port to see a vv. so, only one vlun template will be created per host irrespective of number of FC ports available. Change-Id: I623d6114db866a465955f8a5ae7f40b69c781622 Closes-Bug: #1734505
400 lines
16 KiB
Python
400 lines
16 KiB
Python
# (c) Copyright 2013-2015 Hewlett Packard Enterprise Development LP
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# All Rights Reserved.
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#
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# Copyright 2012 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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Volume driver for HPE 3PAR Storage array.
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This driver requires 3.1.3 or later firmware on the 3PAR array, using
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the 4.x version of the hpe3parclient.
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You will need to install the python hpe3parclient.
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sudo pip install --upgrade "hpe3parclient>=4.0"
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Set the following in the cinder.conf file to enable the
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3PAR Fibre Channel Driver along with the required flags:
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volume_driver=cinder.volume.drivers.hpe.hpe_3par_fc.HPE3PARFCDriver
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"""
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try:
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from hpe3parclient import exceptions as hpeexceptions
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except ImportError:
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hpeexceptions = None
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from oslo_log import log as logging
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from oslo_utils.excutils import save_and_reraise_exception
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from cinder import interface
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from cinder import utils
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from cinder.volume.drivers.hpe import hpe_3par_base as hpebasedriver
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from cinder.zonemanager import utils as fczm_utils
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LOG = logging.getLogger(__name__)
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# EXISTENT_PATH error code returned from hpe3parclient
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EXISTENT_PATH = 73
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@interface.volumedriver
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class HPE3PARFCDriver(hpebasedriver.HPE3PARDriverBase):
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"""OpenStack Fibre Channel driver to enable 3PAR storage array.
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Version history:
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.. code-block:: none
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1.0 - Initial driver
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1.1 - QoS, extend volume, multiple iscsi ports, remove domain,
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session changes, faster clone, requires 3.1.2 MU2 firmware,
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copy volume <--> Image.
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1.2.0 - Updated the use of the hp3parclient to 2.0.0 and refactored
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the drivers to use the new APIs.
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1.2.1 - Synchronized extend_volume method.
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1.2.2 - Added try/finally around client login/logout.
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1.2.3 - Added ability to add WWNs to host.
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1.2.4 - Added metadata during attach/detach bug #1258033.
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1.3.0 - Removed all SSH code. We rely on the hp3parclient now.
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2.0.0 - Update hp3parclient API uses 3.0.x
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2.0.2 - Add back-end assisted volume migrate
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2.0.3 - Added initiator-target map for FC Zone Manager
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2.0.4 - Added support for managing/unmanaging of volumes
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2.0.5 - Only remove FC Zone on last volume detach
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2.0.6 - Added support for volume retype
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2.0.7 - Only one FC port is used when a single FC path
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is present. bug #1360001
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2.0.8 - Fixing missing login/logout around attach/detach bug #1367429
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2.0.9 - Add support for pools with model update
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2.0.10 - Migrate without losing type settings bug #1356608
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2.0.11 - Removing locks bug #1381190
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2.0.12 - Fix queryHost call to specify wwns bug #1398206
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2.0.13 - Fix missing host name during attach bug #1398206
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2.0.14 - Removed usage of host name cache #1398914
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2.0.15 - Added support for updated detach_volume attachment.
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2.0.16 - Added encrypted property to initialize_connection #1439917
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2.0.17 - Improved VLUN creation and deletion logic. #1469816
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2.0.18 - Changed initialize_connection to use getHostVLUNs. #1475064
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2.0.19 - Adds consistency group support
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2.0.20 - Update driver to use ABC metaclasses
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2.0.21 - Added update_migrated_volume. bug # 1492023
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3.0.0 - Rebranded HP to HPE.
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3.0.1 - Remove db access for consistency groups
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3.0.2 - Adds v2 managed replication support
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3.0.3 - Adds v2 unmanaged replication support
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3.0.4 - Adding manage/unmanage snapshot support
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3.0.5 - Optimize array ID retrieval
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3.0.6 - Update replication to version 2.1
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3.0.7 - Remove metadata that tracks the instance ID. bug #1572665
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3.0.8 - NSP feature, creating FC Vlun as match set instead of
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host sees. bug #1577993
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3.0.9 - Handling HTTP conflict 409, host WWN/iSCSI name already used
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by another host, while creating 3PAR FC Host. bug #1597454
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3.0.10 - Added Entry point tracing
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3.0.11 - Handle manage and unmanage hosts present. bug #1648067
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3.0.12 - Adds consistency group capability in generic volume groups.
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4.0.0 - Adds base class.
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4.0.1 - Added check to remove FC zones. bug #1730720
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4.0.2 - Create one vlun in single path configuration. bug #1727176
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4.0.3 - Create FC vlun as host sees. bug #1734505
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"""
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VERSION = "4.0.3"
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# The name of the CI wiki page.
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CI_WIKI_NAME = "HPE_Storage_CI"
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def __init__(self, *args, **kwargs):
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super(HPE3PARFCDriver, self).__init__(*args, **kwargs)
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self.lookup_service = fczm_utils.create_lookup_service()
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self.protocol = 'FC'
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@utils.trace
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@fczm_utils.add_fc_zone
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def initialize_connection(self, volume, connector):
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"""Assigns the volume to a server.
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Assign any created volume to a compute node/host so that it can be
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used from that host.
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The driver returns a driver_volume_type of 'fibre_channel'.
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The target_wwn can be a single entry or a list of wwns that
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correspond to the list of remote wwn(s) that will export the volume.
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Example return values:
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{
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'driver_volume_type': 'fibre_channel'
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'data': {
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'encrypted': False,
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'target_discovered': True,
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'target_lun': 1,
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'target_wwn': '1234567890123',
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}
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}
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or
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{
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'driver_volume_type': 'fibre_channel'
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'data': {
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'encrypted': False,
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'target_discovered': True,
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'target_lun': 1,
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'target_wwn': ['1234567890123', '0987654321321'],
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}
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}
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Steps to export a volume on 3PAR
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* Create a host on the 3par with the target wwn
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* Create a VLUN for that HOST with the volume we want to export.
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"""
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common = self._login()
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try:
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# we have to make sure we have a host
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host = self._create_host(common, volume, connector)
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target_wwns, init_targ_map, numPaths = \
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self._build_initiator_target_map(common, connector)
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if not connector.get('multipath'):
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target_wwns = target_wwns[:1]
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initiator = connector.get('wwpns')[0]
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init_targ_map[initiator] = init_targ_map[initiator][:1]
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# check if a VLUN already exists for this host
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existing_vlun = common.find_existing_vlun(volume, host)
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vlun = None
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if existing_vlun is None:
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# now that we have a host, create the VLUN
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if self.lookup_service is not None and numPaths == 1:
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nsp = None
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active_fc_port_list = common.get_active_fc_target_ports()
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for port in active_fc_port_list:
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if port['portWWN'].lower() == target_wwns[0].lower():
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nsp = port['nsp']
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break
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vlun = common.create_vlun(volume, host, nsp)
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else:
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vlun = common.create_vlun(volume, host)
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else:
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vlun = existing_vlun
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info = {'driver_volume_type': 'fibre_channel',
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'data': {'target_lun': vlun['lun'],
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'target_discovered': True,
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'target_wwn': target_wwns,
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'initiator_target_map': init_targ_map}}
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encryption_key_id = volume.get('encryption_key_id', None)
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info['data']['encrypted'] = encryption_key_id is not None
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return info
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finally:
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self._logout(common)
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@utils.trace
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@fczm_utils.remove_fc_zone
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def terminate_connection(self, volume, connector, **kwargs):
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"""Driver entry point to unattach a volume from an instance."""
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common = self._login()
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try:
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hostname = common._safe_hostname(connector['host'])
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common.terminate_connection(volume, hostname,
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wwn=connector['wwpns'])
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info = {'driver_volume_type': 'fibre_channel',
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'data': {}}
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zone_remove = True
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try:
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vluns = common.client.getHostVLUNs(hostname)
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except hpeexceptions.HTTPNotFound:
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# No more exports for this host.
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pass
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else:
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# Vlun exists, so check for wwpn entry.
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for wwpn in connector.get('wwpns'):
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for vlun in vluns:
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if vlun.get('active') and \
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vlun.get('remoteName') == wwpn.upper():
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zone_remove = False
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break
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if zone_remove:
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LOG.info("Need to remove FC Zone, building initiator "
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"target map")
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target_wwns, init_targ_map, _numPaths = \
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self._build_initiator_target_map(common, connector)
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info['data'] = {'target_wwn': target_wwns,
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'initiator_target_map': init_targ_map}
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return info
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finally:
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self._logout(common)
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def _build_initiator_target_map(self, common, connector):
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"""Build the target_wwns and the initiator target map."""
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fc_ports = common.get_active_fc_target_ports()
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all_target_wwns = []
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target_wwns = []
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init_targ_map = {}
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numPaths = 0
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for port in fc_ports:
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all_target_wwns.append(port['portWWN'])
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if self.lookup_service is not None:
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# use FC san lookup to determine which NSPs to use
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# for the new VLUN.
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dev_map = self.lookup_service.get_device_mapping_from_network(
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connector['wwpns'],
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all_target_wwns)
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for fabric_name in dev_map:
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fabric = dev_map[fabric_name]
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target_wwns += fabric['target_port_wwn_list']
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for initiator in fabric['initiator_port_wwn_list']:
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if initiator not in init_targ_map:
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init_targ_map[initiator] = []
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init_targ_map[initiator] += fabric['target_port_wwn_list']
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init_targ_map[initiator] = list(set(
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init_targ_map[initiator]))
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for _target in init_targ_map[initiator]:
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numPaths += 1
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target_wwns = list(set(target_wwns))
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else:
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initiator_wwns = connector['wwpns']
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target_wwns = all_target_wwns
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for initiator in initiator_wwns:
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init_targ_map[initiator] = target_wwns
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return target_wwns, init_targ_map, numPaths
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def _create_3par_fibrechan_host(self, common, hostname, wwns,
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domain, persona_id):
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"""Create a 3PAR host.
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Create a 3PAR host, if there is already a host on the 3par using
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the same wwn but with a different hostname, return the hostname
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used by 3PAR.
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"""
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# first search for an existing host
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host_found = None
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hosts = common.client.queryHost(wwns=wwns)
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if hosts and hosts['members'] and 'name' in hosts['members'][0]:
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host_found = hosts['members'][0]['name']
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if host_found is not None:
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return host_found
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else:
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persona_id = int(persona_id)
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try:
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common.client.createHost(hostname, FCWwns=wwns,
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optional={'domain': domain,
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'persona': persona_id})
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except hpeexceptions.HTTPConflict as path_conflict:
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msg = "Create FC host caught HTTP conflict code: %s"
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LOG.exception(msg, path_conflict.get_code())
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with save_and_reraise_exception(reraise=False) as ctxt:
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if path_conflict.get_code() is EXISTENT_PATH:
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# Handle exception : EXISTENT_PATH - host WWN/iSCSI
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# name already used by another host
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hosts = common.client.queryHost(wwns=wwns)
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if hosts and hosts['members'] and (
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'name' in hosts['members'][0]):
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hostname = hosts['members'][0]['name']
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else:
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# re rasise last caught exception
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ctxt.reraise = True
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else:
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# re rasise last caught exception
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# for other HTTP conflict
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ctxt.reraise = True
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return hostname
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def _modify_3par_fibrechan_host(self, common, hostname, wwn):
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mod_request = {'pathOperation': common.client.HOST_EDIT_ADD,
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'FCWWNs': wwn}
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try:
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common.client.modifyHost(hostname, mod_request)
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except hpeexceptions.HTTPConflict as path_conflict:
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msg = ("Modify FC Host %(hostname)s caught "
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"HTTP conflict code: %(code)s")
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LOG.exception(msg,
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{'hostname': hostname,
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'code': path_conflict.get_code()})
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def _create_host(self, common, volume, connector):
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"""Creates or modifies existing 3PAR host."""
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host = None
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hostname = common._safe_hostname(connector['host'])
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cpg = common.get_cpg(volume, allowSnap=True)
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domain = common.get_domain(cpg)
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if not connector.get('multipath'):
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connector['wwpns'] = connector['wwpns'][:1]
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try:
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host = common._get_3par_host(hostname)
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# Check whether host with wwn of initiator present on 3par
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hosts = common.client.queryHost(wwns=connector['wwpns'])
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host, hostname = common._get_prioritized_host_on_3par(host,
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hosts,
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hostname)
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except hpeexceptions.HTTPNotFound:
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# get persona from the volume type extra specs
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persona_id = common.get_persona_type(volume)
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# host doesn't exist, we have to create it
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hostname = self._create_3par_fibrechan_host(common,
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hostname,
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connector['wwpns'],
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domain,
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persona_id)
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host = common._get_3par_host(hostname)
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return host
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else:
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return self._add_new_wwn_to_host(common, host, connector['wwpns'])
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def _add_new_wwn_to_host(self, common, host, wwns):
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"""Add wwns to a host if one or more don't exist.
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Identify if argument wwns contains any world wide names
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not configured in the 3PAR host path. If any are found,
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add them to the 3PAR host.
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"""
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# get the currently configured wwns
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# from the host's FC paths
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host_wwns = []
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if 'FCPaths' in host:
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for path in host['FCPaths']:
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wwn = path.get('wwn', None)
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if wwn is not None:
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host_wwns.append(wwn.lower())
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# lower case all wwns in the compare list
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compare_wwns = [x.lower() for x in wwns]
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# calculate wwns in compare list, but not in host_wwns list
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new_wwns = list(set(compare_wwns).difference(host_wwns))
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# if any wwns found that were not in host list,
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# add them to the host
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if (len(new_wwns) > 0):
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self._modify_3par_fibrechan_host(common, host['name'], new_wwns)
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host = common._get_3par_host(host['name'])
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return host
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