104 lines
3.8 KiB
Python
104 lines
3.8 KiB
Python
# Copyright (c) 2014 Navneet Singh. All rights reserved.
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# Copyright (c) 2014 Clinton Knight. All rights reserved.
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# Copyright (c) 2015 Alex Meade. All Rights Reserved.
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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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Unified driver for NetApp storage systems.
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Supports multiple storage systems of different families and protocols.
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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 driver
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from cinder.volume.drivers.netapp import options
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from cinder.volume.drivers.netapp import utils as na_utils
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LOG = logging.getLogger(__name__)
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DATAONTAP_PATH = 'cinder.volume.drivers.netapp.dataontap'
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# Add new drivers here, no other code changes required.
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NETAPP_UNIFIED_DRIVER_REGISTRY = {
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'ontap_cluster':
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{
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'iscsi': DATAONTAP_PATH + '.iscsi_cmode.NetAppCmodeISCSIDriver',
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'nfs': DATAONTAP_PATH + '.nfs_cmode.NetAppCmodeNfsDriver',
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'fc': DATAONTAP_PATH + '.fc_cmode.NetAppCmodeFibreChannelDriver'
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}}
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class NetAppDriver(driver.ProxyVD):
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"""NetApp unified block storage driver.
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Acts as a factory to create NetApp storage drivers based on the
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storage family and protocol configured.
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"""
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REQUIRED_FLAGS = ['netapp_storage_family', 'netapp_storage_protocol']
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def __new__(cls, *args, **kwargs):
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config = kwargs.get('configuration', None)
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if not config:
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raise exception.InvalidInput(
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reason=_('Required configuration not found'))
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config.append_config_values(options.netapp_proxy_opts)
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na_utils.check_flags(NetAppDriver.REQUIRED_FLAGS, config)
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app_version = na_utils.OpenStackInfo().info()
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LOG.info('OpenStack OS Version Info: %(info)s',
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{'info': app_version})
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kwargs['app_version'] = app_version
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return NetAppDriver.create_driver(config.netapp_storage_family,
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config.netapp_storage_protocol,
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*args, **kwargs)
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@staticmethod
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def create_driver(storage_family, storage_protocol, *args, **kwargs):
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"""Creates an appropriate driver based on family and protocol."""
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storage_family = storage_family.lower()
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storage_protocol = storage_protocol.lower()
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fmt = {'storage_family': storage_family,
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'storage_protocol': storage_protocol}
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LOG.info('Requested unified config: %(storage_family)s and '
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'%(storage_protocol)s.', fmt)
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family_meta = NETAPP_UNIFIED_DRIVER_REGISTRY.get(storage_family)
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if family_meta is None:
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raise exception.InvalidInput(
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reason=_('Storage family %s is not supported.')
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% storage_family)
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driver_loc = family_meta.get(storage_protocol)
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if driver_loc is None:
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raise exception.InvalidInput(
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reason=_('Protocol %(storage_protocol)s is not supported '
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'for storage family %(storage_family)s.') % fmt)
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kwargs = kwargs or {}
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kwargs['netapp_mode'] = 'proxy'
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driver = importutils.import_object(driver_loc, *args, **kwargs)
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LOG.info('NetApp driver of family %(storage_family)s and protocol '
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'%(storage_protocol)s loaded.', fmt)
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return driver
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