587 lines
25 KiB
Python
587 lines
25 KiB
Python
# Copyright (c) 2012 NetApp, Inc. All rights reserved.
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# Copyright (c) 2014 Ben Swartzlander. All rights reserved.
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# 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) 2014 Alex Meade. All rights reserved.
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# Copyright (c) 2014 Andrew Kerr. All rights reserved.
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# Copyright (c) 2014 Jeff Applewhite. All rights reserved.
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# Copyright (c) 2015 Tom Barron. All rights reserved.
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# Copyright (c) 2015 Goutham Pacha Ravi. All rights reserved.
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# Copyright (c) 2016 Mike Rooney. 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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Volume driver library for NetApp C-mode block storage systems.
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"""
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from oslo_log import log as logging
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from oslo_utils import units
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import six
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from cinder import exception
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from cinder.i18n import _
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from cinder.objects import fields
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from cinder import utils
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from cinder.volume.drivers.netapp.dataontap import block_base
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from cinder.volume.drivers.netapp.dataontap.performance import perf_cmode
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from cinder.volume.drivers.netapp.dataontap.utils import capabilities
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from cinder.volume.drivers.netapp.dataontap.utils import data_motion
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from cinder.volume.drivers.netapp.dataontap.utils import loopingcalls
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from cinder.volume.drivers.netapp.dataontap.utils import utils as dot_utils
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from cinder.volume.drivers.netapp import options as na_opts
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from cinder.volume.drivers.netapp import utils as na_utils
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from cinder.volume import utils as volume_utils
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LOG = logging.getLogger(__name__)
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@six.add_metaclass(utils.TraceWrapperMetaclass)
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class NetAppBlockStorageCmodeLibrary(block_base.NetAppBlockStorageLibrary,
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data_motion.DataMotionMixin):
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"""NetApp block storage library for Data ONTAP (Cluster-mode)."""
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REQUIRED_CMODE_FLAGS = ['netapp_vserver']
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def __init__(self, driver_name, driver_protocol, **kwargs):
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super(NetAppBlockStorageCmodeLibrary, self).__init__(driver_name,
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driver_protocol,
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**kwargs)
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self.configuration.append_config_values(na_opts.netapp_cluster_opts)
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self.driver_mode = 'cluster'
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self.failed_over_backend_name = kwargs.get('active_backend_id')
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self.failed_over = self.failed_over_backend_name is not None
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self.replication_enabled = (
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True if self.get_replication_backend_names(
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self.configuration) else False)
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def do_setup(self, context):
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super(NetAppBlockStorageCmodeLibrary, self).do_setup(context)
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na_utils.check_flags(self.REQUIRED_CMODE_FLAGS, self.configuration)
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# cDOT API client
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self.zapi_client = dot_utils.get_client_for_backend(
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self.failed_over_backend_name or self.backend_name)
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self.vserver = self.zapi_client.vserver
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# Storage service catalog
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self.ssc_library = capabilities.CapabilitiesLibrary(
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self.driver_protocol, self.vserver, self.zapi_client,
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self.configuration)
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self.ssc_library.check_api_permissions()
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self.using_cluster_credentials = (
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self.ssc_library.cluster_user_supported())
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# Performance monitoring library
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self.perf_library = perf_cmode.PerformanceCmodeLibrary(
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self.zapi_client)
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def _update_zapi_client(self, backend_name):
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"""Set cDOT API client for the specified config backend stanza name."""
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self.zapi_client = dot_utils.get_client_for_backend(backend_name)
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self.vserver = self.zapi_client.vserver
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self.ssc_library._update_for_failover(self.zapi_client,
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self._get_flexvol_to_pool_map())
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ssc = self.ssc_library.get_ssc()
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self.perf_library._update_for_failover(self.zapi_client, ssc)
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# Clear LUN table cache
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self.lun_table = {}
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def check_for_setup_error(self):
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"""Check that the driver is working and can communicate."""
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if not self._get_flexvol_to_pool_map():
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msg = _('No pools are available for provisioning volumes. '
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'Ensure that the configuration option '
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'netapp_pool_name_search_pattern is set correctly.')
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raise exception.NetAppDriverException(msg)
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self._add_looping_tasks()
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super(NetAppBlockStorageCmodeLibrary, self).check_for_setup_error()
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def _add_looping_tasks(self):
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"""Add tasks that need to be executed at a fixed interval."""
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# Note(cknight): Run the update once in the current thread to prevent a
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# race with the first invocation of _update_volume_stats.
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self._update_ssc()
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# Add the task that updates the slow-changing storage service catalog
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self.loopingcalls.add_task(self._update_ssc,
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loopingcalls.ONE_HOUR,
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loopingcalls.ONE_HOUR)
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self.loopingcalls.add_task(
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self._handle_housekeeping_tasks,
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loopingcalls.TEN_MINUTES,
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0)
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super(NetAppBlockStorageCmodeLibrary, self)._add_looping_tasks()
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def _handle_housekeeping_tasks(self):
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"""Handle various cleanup activities."""
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active_backend = self.failed_over_backend_name or self.backend_name
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# Add the task that harvests soft-deleted QoS policy groups.
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if self.using_cluster_credentials:
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self.zapi_client.remove_unused_qos_policy_groups()
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LOG.debug("Current service state: Replication enabled: %("
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"replication)s. Failed-Over: %(failed)s. Active Backend "
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"ID: %(active)s",
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{
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'replication': self.replication_enabled,
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'failed': self.failed_over,
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'active': active_backend,
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})
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# Create pool mirrors if whole-backend replication configured
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if self.replication_enabled and not self.failed_over:
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self.ensure_snapmirrors(
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self.configuration, self.backend_name,
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self.ssc_library.get_ssc_flexvol_names())
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def _handle_ems_logging(self):
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"""Log autosupport messages."""
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base_ems_message = dot_utils.build_ems_log_message_0(
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self.driver_name, self.app_version)
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self.zapi_client.send_ems_log_message(base_ems_message)
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pool_ems_message = dot_utils.build_ems_log_message_1(
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self.driver_name, self.app_version, self.vserver,
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self.ssc_library.get_ssc_flexvol_names(), [])
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self.zapi_client.send_ems_log_message(pool_ems_message)
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def _create_lun(self, volume_name, lun_name, size,
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metadata, qos_policy_group_name=None):
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"""Creates a LUN, handling Data ONTAP differences as needed."""
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self.zapi_client.create_lun(
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volume_name, lun_name, size, metadata, qos_policy_group_name)
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def _create_lun_handle(self, metadata, vserver=None):
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"""Returns LUN handle based on filer type."""
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vserver = vserver or self.vserver
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return '%s:%s' % (self.vserver, metadata['Path'])
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def _find_mapped_lun_igroup(self, path, initiator_list):
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"""Find an igroup for a LUN mapped to the given initiator(s)."""
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initiator_igroups = self.zapi_client.get_igroup_by_initiators(
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initiator_list)
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lun_maps = self.zapi_client.get_lun_map(path)
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if initiator_igroups and lun_maps:
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for igroup in initiator_igroups:
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igroup_name = igroup['initiator-group-name']
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if igroup_name.startswith(na_utils.OPENSTACK_PREFIX):
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for lun_map in lun_maps:
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if lun_map['initiator-group'] == igroup_name:
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return igroup_name, lun_map['lun-id']
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return None, None
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def _clone_lun(self, name, new_name, space_reserved=None,
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qos_policy_group_name=None, src_block=0, dest_block=0,
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block_count=0, source_snapshot=None, is_snapshot=False):
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"""Clone LUN with the given handle to the new name."""
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if not space_reserved:
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space_reserved = self.lun_space_reservation
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metadata = self._get_lun_attr(name, 'metadata')
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volume = metadata['Volume']
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self.zapi_client.clone_lun(volume, name, new_name, space_reserved,
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qos_policy_group_name=qos_policy_group_name,
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src_block=src_block, dest_block=dest_block,
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block_count=block_count,
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source_snapshot=source_snapshot,
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is_snapshot=is_snapshot)
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LOG.debug("Cloned LUN with new name %s", new_name)
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lun = self.zapi_client.get_lun_by_args(vserver=self.vserver,
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path='/vol/%s/%s'
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% (volume, new_name))
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if len(lun) == 0:
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msg = _("No cloned LUN named %s found on the filer")
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raise exception.VolumeBackendAPIException(data=msg % new_name)
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clone_meta = self._create_lun_meta(lun[0])
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self._add_lun_to_table(
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block_base.NetAppLun('%s:%s' % (clone_meta['Vserver'],
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clone_meta['Path']),
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new_name,
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lun[0].get_child_content('size'),
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clone_meta))
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def _create_lun_meta(self, lun):
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"""Creates LUN metadata dictionary."""
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self.zapi_client.check_is_naelement(lun)
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meta_dict = {}
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meta_dict['Vserver'] = lun.get_child_content('vserver')
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meta_dict['Volume'] = lun.get_child_content('volume')
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meta_dict['Qtree'] = lun.get_child_content('qtree')
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meta_dict['Path'] = lun.get_child_content('path')
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meta_dict['OsType'] = lun.get_child_content('multiprotocol-type')
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meta_dict['SpaceReserved'] = \
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lun.get_child_content('is-space-reservation-enabled')
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meta_dict['UUID'] = lun.get_child_content('uuid')
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return meta_dict
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def _get_fc_target_wwpns(self, include_partner=True):
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return self.zapi_client.get_fc_target_wwpns()
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def _update_volume_stats(self, filter_function=None,
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goodness_function=None):
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"""Retrieve backend stats."""
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LOG.debug('Updating volume stats')
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data = {}
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backend_name = self.configuration.safe_get('volume_backend_name')
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data['volume_backend_name'] = backend_name or self.driver_name
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data['vendor_name'] = 'NetApp'
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data['driver_version'] = self.VERSION
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data['storage_protocol'] = self.driver_protocol
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data['pools'] = self._get_pool_stats(
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filter_function=filter_function,
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goodness_function=goodness_function)
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data['sparse_copy_volume'] = True
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# Used for service state report
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data['replication_enabled'] = self.replication_enabled
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self._stats = data
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def _get_pool_stats(self, filter_function=None, goodness_function=None):
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"""Retrieve pool (Data ONTAP flexvol) stats.
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Pool statistics are assembled from static driver capabilities, the
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Storage Service Catalog of flexvol attributes, and real-time capacity
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and controller utilization metrics. The pool name is the flexvol name.
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"""
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pools = []
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ssc = self.ssc_library.get_ssc()
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if not ssc:
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return pools
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# Utilization and performance metrics require cluster-scoped
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# credentials
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if self.using_cluster_credentials:
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# Get up-to-date node utilization metrics just once
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self.perf_library.update_performance_cache(ssc)
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# Get up-to-date aggregate capacities just once
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aggregates = self.ssc_library.get_ssc_aggregates()
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aggr_capacities = self.zapi_client.get_aggregate_capacities(
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aggregates)
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else:
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aggr_capacities = {}
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for ssc_vol_name, ssc_vol_info in ssc.items():
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pool = dict()
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# Add storage service catalog data
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pool.update(ssc_vol_info)
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# Add driver capabilities and config info
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pool['QoS_support'] = self.using_cluster_credentials
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pool['multiattach'] = True
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pool['online_extend_support'] = False
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pool['consistencygroup_support'] = True
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pool['consistent_group_snapshot_enabled'] = True
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pool['reserved_percentage'] = self.reserved_percentage
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pool['max_over_subscription_ratio'] = (
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self.max_over_subscription_ratio)
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# Add up-to-date capacity info
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capacity = self.zapi_client.get_flexvol_capacity(
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flexvol_name=ssc_vol_name)
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size_total_gb = capacity['size-total'] / units.Gi
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pool['total_capacity_gb'] = na_utils.round_down(size_total_gb)
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size_available_gb = capacity['size-available'] / units.Gi
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pool['free_capacity_gb'] = na_utils.round_down(size_available_gb)
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if self.using_cluster_credentials:
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dedupe_used = self.zapi_client.get_flexvol_dedupe_used_percent(
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ssc_vol_name)
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else:
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dedupe_used = 0.0
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pool['netapp_dedupe_used_percent'] = na_utils.round_down(
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dedupe_used)
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aggregate_name = ssc_vol_info.get('netapp_aggregate')
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aggr_capacity = aggr_capacities.get(aggregate_name, {})
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pool['netapp_aggregate_used_percent'] = aggr_capacity.get(
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'percent-used', 0)
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# Add utilization data
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utilization = self.perf_library.get_node_utilization_for_pool(
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ssc_vol_name)
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pool['utilization'] = na_utils.round_down(utilization)
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pool['filter_function'] = filter_function
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pool['goodness_function'] = goodness_function
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# Add replication capabilities/stats
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pool.update(
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self.get_replication_backend_stats(self.configuration))
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pools.append(pool)
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return pools
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def _update_ssc(self):
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"""Refresh the storage service catalog with the latest set of pools."""
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self.ssc_library.update_ssc(self._get_flexvol_to_pool_map())
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def _get_flexvol_to_pool_map(self):
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"""Get the flexvols that match the pool name search pattern.
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The map is of the format suitable for seeding the storage service
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catalog: {<flexvol_name> : {'pool_name': <flexvol_name>}}
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"""
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pool_regex = na_utils.get_pool_name_filter_regex(self.configuration)
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pools = {}
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flexvol_names = self.zapi_client.list_flexvols()
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for flexvol_name in flexvol_names:
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msg_args = {
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'flexvol': flexvol_name,
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'vol_pattern': pool_regex.pattern,
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}
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if pool_regex.match(flexvol_name):
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msg = "Volume '%(flexvol)s' matches %(vol_pattern)s"
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LOG.debug(msg, msg_args)
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pools[flexvol_name] = {'pool_name': flexvol_name}
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else:
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msg = "Volume '%(flexvol)s' does not match %(vol_pattern)s"
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LOG.debug(msg, msg_args)
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return pools
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def delete_volume(self, volume):
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"""Driver entry point for destroying existing volumes."""
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super(NetAppBlockStorageCmodeLibrary, self).delete_volume(volume)
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try:
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qos_policy_group_info = na_utils.get_valid_qos_policy_group_info(
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volume)
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except exception.Invalid:
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# Delete even if there was invalid qos policy specified for the
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# volume.
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qos_policy_group_info = None
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self._mark_qos_policy_group_for_deletion(qos_policy_group_info)
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msg = 'Deleted LUN with name %(name)s and QoS info %(qos)s'
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LOG.debug(msg, {'name': volume['name'], 'qos': qos_policy_group_info})
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def _setup_qos_for_volume(self, volume, extra_specs):
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try:
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qos_policy_group_info = na_utils.get_valid_qos_policy_group_info(
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volume, extra_specs)
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except exception.Invalid:
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msg = _('Invalid QoS specification detected while getting QoS '
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'policy for volume %s') % volume['id']
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raise exception.VolumeBackendAPIException(data=msg)
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self.zapi_client.provision_qos_policy_group(qos_policy_group_info)
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return qos_policy_group_info
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def _get_volume_model_update(self, volume):
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"""Provide any updates necessary for a volume being created/managed."""
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if self.replication_enabled:
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return {'replication_status': fields.ReplicationStatus.ENABLED}
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def _mark_qos_policy_group_for_deletion(self, qos_policy_group_info):
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self.zapi_client.mark_qos_policy_group_for_deletion(
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qos_policy_group_info)
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def unmanage(self, volume):
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"""Removes the specified volume from Cinder management.
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Does not delete the underlying backend storage object.
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"""
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try:
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qos_policy_group_info = na_utils.get_valid_qos_policy_group_info(
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volume)
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except exception.Invalid:
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# Unmanage even if there was invalid qos policy specified for the
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# volume.
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qos_policy_group_info = None
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self._mark_qos_policy_group_for_deletion(qos_policy_group_info)
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super(NetAppBlockStorageCmodeLibrary, self).unmanage(volume)
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def failover_host(self, context, volumes, secondary_id=None, groups=None):
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"""Failover a backend to a secondary replication target."""
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return self._failover_host(volumes, secondary_id=secondary_id)
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def _get_backing_flexvol_names(self):
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"""Returns a list of backing flexvol names."""
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ssc = self.ssc_library.get_ssc()
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return list(ssc.keys())
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def create_group(self, group):
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"""Driver entry point for creating a generic volume group.
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ONTAP does not maintain an actual Group construct. As a result, no
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communication to the backend is necessary for generic volume group
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creation.
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:returns: Hard-coded model update for generic volume group model.
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"""
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model_update = {'status': fields.GroupStatus.AVAILABLE}
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return model_update
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def delete_group(self, group, volumes):
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"""Driver entry point for deleting a group.
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:returns: Updated group model and list of volume models
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for the volumes that were deleted.
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"""
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model_update = {'status': fields.GroupStatus.DELETED}
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volumes_model_update = []
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for volume in volumes:
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try:
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|
self._delete_lun(volume['name'])
|
|
volumes_model_update.append(
|
|
{'id': volume['id'], 'status': 'deleted'})
|
|
except Exception:
|
|
volumes_model_update.append(
|
|
{'id': volume['id'],
|
|
'status': 'error_deleting'})
|
|
LOG.exception("Volume %(vol)s in the group could not be "
|
|
"deleted.", {'vol': volume})
|
|
return model_update, volumes_model_update
|
|
|
|
def update_group(self, group, add_volumes=None, remove_volumes=None):
|
|
"""Driver entry point for updating a generic volume group.
|
|
|
|
Since no actual group construct is ever created in ONTAP, it is not
|
|
necessary to update any metadata on the backend. Since this is a NO-OP,
|
|
there is guaranteed to be no change in any of the volumes' statuses.
|
|
"""
|
|
return None, None, None
|
|
|
|
def create_group_snapshot(self, group_snapshot, snapshots):
|
|
"""Creates a Cinder group snapshot object.
|
|
|
|
The Cinder group snapshot object is created by making use of an
|
|
ephemeral ONTAP consistency group snapshot in order to provide
|
|
write-order consistency for a set of flexvol snapshots. First, a list
|
|
of the flexvols backing the given Cinder group must be gathered. An
|
|
ONTAP group-snapshot of these flexvols will create a snapshot copy of
|
|
all the Cinder volumes in the generic volume group. For each Cinder
|
|
volume in the group, it is then necessary to clone its backing LUN from
|
|
the ONTAP cg-snapshot. The naming convention used for the clones is
|
|
what indicates the clone's role as a Cinder snapshot and its inclusion
|
|
in a Cinder group. The ONTAP cg-snapshot of the flexvols is no longer
|
|
required after having cloned the LUNs backing the Cinder volumes in
|
|
the Cinder group.
|
|
|
|
:returns: An implicit update for group snapshot and snapshots models
|
|
that is interpreted by the manager to set their models to
|
|
available.
|
|
"""
|
|
try:
|
|
if volume_utils.is_group_a_cg_snapshot_type(group_snapshot):
|
|
self._create_consistent_group_snapshot(group_snapshot,
|
|
snapshots)
|
|
else:
|
|
for snapshot in snapshots:
|
|
self._create_snapshot(snapshot)
|
|
except Exception as ex:
|
|
err_msg = (_("Create group snapshot failed (%s).") % ex)
|
|
LOG.exception(err_msg, resource=group_snapshot)
|
|
raise exception.NetAppDriverException(err_msg)
|
|
|
|
return None, None
|
|
|
|
def _create_consistent_group_snapshot(self, group_snapshot, snapshots):
|
|
flexvols = set()
|
|
for snapshot in snapshots:
|
|
flexvols.add(volume_utils.extract_host(
|
|
snapshot['volume']['host'], level='pool'))
|
|
|
|
self.zapi_client.create_cg_snapshot(flexvols, group_snapshot['id'])
|
|
|
|
for snapshot in snapshots:
|
|
self._clone_lun(snapshot['volume']['name'], snapshot['name'],
|
|
source_snapshot=group_snapshot['id'])
|
|
|
|
for flexvol in flexvols:
|
|
try:
|
|
self.zapi_client.wait_for_busy_snapshot(
|
|
flexvol, group_snapshot['id'])
|
|
self.zapi_client.delete_snapshot(
|
|
flexvol, group_snapshot['id'])
|
|
except exception.SnapshotIsBusy:
|
|
self.zapi_client.mark_snapshot_for_deletion(
|
|
flexvol, group_snapshot['id'])
|
|
|
|
def delete_group_snapshot(self, group_snapshot, snapshots):
|
|
"""Delete LUNs backing each snapshot in the group snapshot.
|
|
|
|
:returns: An implicit update for snapshots models that is interpreted
|
|
by the manager to set their models to deleted.
|
|
"""
|
|
for snapshot in snapshots:
|
|
self._delete_lun(snapshot['name'])
|
|
LOG.debug("Snapshot %s deletion successful", snapshot['name'])
|
|
|
|
return None, None
|
|
|
|
def create_group_from_src(self, group, volumes, group_snapshot=None,
|
|
snapshots=None, source_group=None,
|
|
source_vols=None):
|
|
"""Creates a group from a group snapshot or a group of cinder vols.
|
|
|
|
:returns: An implicit update for the volumes model that is
|
|
interpreted by the manager as a successful operation.
|
|
"""
|
|
LOG.debug("VOLUMES %s ", ', '.join([vol['id'] for vol in volumes]))
|
|
volume_model_updates = []
|
|
|
|
if group_snapshot:
|
|
vols = zip(volumes, snapshots)
|
|
|
|
for volume, snapshot in vols:
|
|
source = {
|
|
'name': snapshot['name'],
|
|
'size': snapshot['volume_size'],
|
|
}
|
|
volume_model_update = self._clone_source_to_destination(
|
|
source, volume)
|
|
if volume_model_update is not None:
|
|
volume_model_update['id'] = volume['id']
|
|
volume_model_updates.append(volume_model_update)
|
|
|
|
else:
|
|
vols = zip(volumes, source_vols)
|
|
|
|
for volume, old_src_vref in vols:
|
|
src_lun = self._get_lun_from_table(old_src_vref['name'])
|
|
source = {'name': src_lun.name, 'size': old_src_vref['size']}
|
|
volume_model_update = self._clone_source_to_destination(
|
|
source, volume)
|
|
if volume_model_update is not None:
|
|
volume_model_update['id'] = volume['id']
|
|
volume_model_updates.append(volume_model_update)
|
|
|
|
return None, volume_model_updates
|