371 lines
15 KiB
Python
371 lines
15 KiB
Python
# Copyright 2012 Pedro Navarro Perez
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# Copyright 2013 Cloudbase Solutions Srl
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# 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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Management class for Storage-related functions (attach, detach, etc).
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"""
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import time
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import nova.conf
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from nova import exception
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from nova import utils
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from nova.virt import driver
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from os_brick.initiator import connector
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from os_win import utilsfactory
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from oslo_log import log as logging
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from oslo_utils import strutils
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from hyperv.i18n import _, _LI, _LE, _LW
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from hyperv.nova import constants
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LOG = logging.getLogger(__name__)
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CONF = nova.conf.CONF
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class VolumeOps(object):
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"""Management class for Volume-related tasks
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"""
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def __init__(self):
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self._vmutils = utilsfactory.get_vmutils()
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self._default_root_device = 'vda'
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self.volume_drivers = {
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constants.STORAGE_PROTOCOL_SMBFS: SMBFSVolumeDriver(),
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constants.STORAGE_PROTOCOL_ISCSI: ISCSIVolumeDriver(),
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constants.STORAGE_PROTOCOL_FC: FCVolumeDriver()}
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def _get_volume_driver(self, connection_info):
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driver_type = connection_info.get('driver_volume_type')
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if driver_type not in self.volume_drivers:
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raise exception.VolumeDriverNotFound(driver_type=driver_type)
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return self.volume_drivers[driver_type]
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def attach_volumes(self, volumes, instance_name):
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for vol in volumes:
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self.attach_volume(vol['connection_info'], instance_name)
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def disconnect_volumes(self, block_device_info):
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mapping = driver.block_device_info_get_mapping(block_device_info)
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for vol in mapping:
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self.disconnect_volume(vol['connection_info'])
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def attach_volume(self, connection_info, instance_name,
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disk_bus=constants.CTRL_TYPE_SCSI):
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tries_left = CONF.hyperv.volume_attach_retry_count + 1
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while tries_left:
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try:
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self._attach_volume(connection_info,
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instance_name,
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disk_bus)
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break
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except Exception as ex:
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tries_left -= 1
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if not tries_left:
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LOG.exception(
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_LE("Failed to attach volume %(connection_info)s "
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"to instance %(instance_name)s. "),
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{'connection_info': strutils.mask_dict_password(
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connection_info),
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'instance_name': instance_name})
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self.disconnect_volume(connection_info)
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raise exception.VolumeAttachFailed(
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volume_id=connection_info['serial'],
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reason=ex)
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else:
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LOG.warning(
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_LW("Failed to attach volume %(connection_info)s "
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"to instance %(instance_name)s. "
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"Tries left: %(tries_left)s."),
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{'connection_info': strutils.mask_dict_password(
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connection_info),
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'instance_name': instance_name,
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'tries_left': tries_left})
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time.sleep(CONF.hyperv.volume_attach_retry_interval)
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def _attach_volume(self, connection_info, instance_name,
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disk_bus=constants.CTRL_TYPE_SCSI):
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LOG.debug(
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"Attaching volume: %(connection_info)s to %(instance_name)s",
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{'connection_info': strutils.mask_dict_password(connection_info),
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'instance_name': instance_name})
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volume_driver = self._get_volume_driver(connection_info)
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volume_driver.attach_volume(connection_info,
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instance_name,
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disk_bus)
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qos_specs = connection_info['data'].get('qos_specs') or {}
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if qos_specs:
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volume_driver.set_disk_qos_specs(connection_info,
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qos_specs)
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def disconnect_volume(self, connection_info):
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volume_driver = self._get_volume_driver(connection_info)
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volume_driver.disconnect_volume(connection_info)
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def detach_volume(self, connection_info, instance_name):
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LOG.debug("Detaching volume: %(connection_info)s "
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"from %(instance_name)s",
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{'connection_info': strutils.mask_dict_password(
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connection_info),
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'instance_name': instance_name})
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volume_driver = self._get_volume_driver(connection_info)
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volume_driver.detach_volume(connection_info, instance_name)
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volume_driver.disconnect_volume(connection_info)
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def fix_instance_volume_disk_paths(self, instance_name, block_device_info):
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# Mapping containing the current disk paths for each volume.
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actual_disk_mapping = self.get_disk_path_mapping(block_device_info)
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if not actual_disk_mapping:
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return
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# Mapping containing virtual disk resource path and the physical
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# disk path for each volume serial number. The physical path
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# associated with this resource may not be the right one,
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# as physical disk paths can get swapped after host reboots.
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vm_disk_mapping = self._vmutils.get_vm_physical_disk_mapping(
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instance_name)
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for serial, vm_disk in vm_disk_mapping.items():
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actual_disk_path = actual_disk_mapping[serial]
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if vm_disk['mounted_disk_path'] != actual_disk_path:
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self._vmutils.set_disk_host_res(vm_disk['resource_path'],
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actual_disk_path)
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def get_volume_connector(self):
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# NOTE(lpetrut): the Windows os-brick connectors
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# do not use a root helper.
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conn = connector.get_connector_properties(
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root_helper=None,
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my_ip=CONF.my_block_storage_ip,
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multipath=CONF.hyperv.use_multipath_io,
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enforce_multipath=True,
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host=CONF.host)
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return conn
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def connect_volumes(self, block_device_info):
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mapping = driver.block_device_info_get_mapping(block_device_info)
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for vol in mapping:
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connection_info = vol['connection_info']
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volume_driver = self._get_volume_driver(connection_info)
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volume_driver.connect_volume(connection_info)
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def get_disk_path_mapping(self, block_device_info, block_dev_only=False):
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block_mapping = driver.block_device_info_get_mapping(block_device_info)
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disk_path_mapping = {}
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for vol in block_mapping:
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connection_info = vol['connection_info']
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disk_serial = connection_info['serial']
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volume_driver = self._get_volume_driver(connection_info)
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if block_dev_only and not volume_driver._is_block_dev:
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continue
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disk_path = volume_driver.get_disk_resource_path(connection_info)
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disk_path_mapping[disk_serial] = disk_path
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return disk_path_mapping
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def get_disk_resource_path(self, connection_info):
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volume_driver = self._get_volume_driver(connection_info)
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return volume_driver.get_disk_resource_path(connection_info)
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@staticmethod
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def bytes_per_sec_to_iops(no_bytes):
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# Hyper-v uses normalized IOPS (8 KB increments)
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# as IOPS allocation units.
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return (
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(no_bytes + constants.IOPS_BASE_SIZE - 1) //
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constants.IOPS_BASE_SIZE)
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@staticmethod
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def validate_qos_specs(qos_specs, supported_qos_specs):
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unsupported_specs = set(qos_specs.keys()).difference(
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supported_qos_specs)
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if unsupported_specs:
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msg = (_LW('Got unsupported QoS specs: '
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'%(unsupported_specs)s. '
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'Supported qos specs: %(supported_qos_specs)s') %
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{'unsupported_specs': unsupported_specs,
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'supported_qos_specs': supported_qos_specs})
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LOG.warning(msg)
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class BaseVolumeDriver(object):
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_is_block_dev = True
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_protocol = None
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_extra_connector_args = {}
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def __init__(self):
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self._conn = None
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self._diskutils = utilsfactory.get_diskutils()
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self._vmutils = utilsfactory.get_vmutils()
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@property
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def _connector(self):
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if not self._conn:
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scan_attempts = CONF.hyperv.mounted_disk_query_retry_count
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scan_interval = CONF.hyperv.mounted_disk_query_retry_interval
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self._conn = connector.InitiatorConnector.factory(
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protocol=self._protocol,
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root_helper=None,
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use_multipath=CONF.hyperv.use_multipath_io,
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device_scan_attempts=scan_attempts,
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device_scan_interval=scan_interval,
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**self._extra_connector_args)
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return self._conn
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def connect_volume(self, connection_info):
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return self._connector.connect_volume(connection_info['data'])
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def disconnect_volume(self, connection_info):
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self._connector.disconnect_volume(connection_info['data'])
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def get_disk_resource_path(self, connection_info):
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disk_paths = self._connector.get_volume_paths(connection_info['data'])
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if not disk_paths:
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vol_id = connection_info['serial']
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err_msg = _("Could not find disk path. Volume id: %s")
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raise exception.DiskNotFound(err_msg % vol_id)
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return self._get_disk_res_path(disk_paths[0])
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def _get_disk_res_path(self, disk_path):
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if self._is_block_dev:
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# We need the Msvm_DiskDrive resource path as this
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# will be used when the disk is attached to an instance.
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disk_number = self._diskutils.get_device_number_from_device_name(
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disk_path)
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disk_res_path = self._vmutils.get_mounted_disk_by_drive_number(
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disk_number)
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else:
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disk_res_path = disk_path
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return disk_res_path
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def attach_volume(self, connection_info, instance_name,
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disk_bus=constants.CTRL_TYPE_SCSI):
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dev_info = self.connect_volume(connection_info)
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serial = connection_info['serial']
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disk_path = self._get_disk_res_path(dev_info['path'])
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ctrller_path, slot = self._get_disk_ctrl_and_slot(instance_name,
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disk_bus)
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if self._is_block_dev:
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# We need to tag physical disk resources with the volume
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# serial number, in order to be able to retrieve them
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# during live migration.
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self._vmutils.attach_volume_to_controller(instance_name,
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ctrller_path,
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slot,
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disk_path,
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serial=serial)
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else:
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self._vmutils.attach_drive(instance_name,
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disk_path,
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ctrller_path,
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slot)
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def detach_volume(self, connection_info, instance_name):
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disk_path = self.get_disk_resource_path(connection_info)
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LOG.debug("Detaching disk %(disk_path)s "
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"from instance: %(instance_name)s",
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dict(disk_path=disk_path,
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instance_name=instance_name))
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self._vmutils.detach_vm_disk(instance_name, disk_path,
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is_physical=self._is_block_dev)
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def _get_disk_ctrl_and_slot(self, instance_name, disk_bus):
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if disk_bus == constants.CTRL_TYPE_IDE:
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# Find the IDE controller for the vm.
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ctrller_path = self._vmutils.get_vm_ide_controller(
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instance_name, 0)
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# Attaching to the first slot
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slot = 0
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else:
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# Find the SCSI controller for the vm
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ctrller_path = self._vmutils.get_vm_scsi_controller(
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instance_name)
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slot = self._vmutils.get_free_controller_slot(ctrller_path)
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return ctrller_path, slot
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def set_disk_qos_specs(self, connection_info, disk_qos_specs):
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LOG.info(_LI("The %(protocol)s Hyper-V volume driver "
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"does not support QoS. Ignoring QoS specs."),
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dict(protocol=self._protocol))
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class ISCSIVolumeDriver(BaseVolumeDriver):
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_is_block_dev = True
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_protocol = constants.STORAGE_PROTOCOL_ISCSI
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def __init__(self, *args, **kwargs):
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self._extra_connector_args = dict(
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initiator_list=CONF.hyperv.iscsi_initiator_list)
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super(ISCSIVolumeDriver, self).__init__(*args, **kwargs)
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class SMBFSVolumeDriver(BaseVolumeDriver):
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_is_block_dev = False
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_protocol = constants.STORAGE_PROTOCOL_SMBFS
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_extra_connector_args = dict(local_path_for_loopback=True)
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def export_path_synchronized(f):
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def wrapper(inst, connection_info, *args, **kwargs):
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export_path = inst._get_export_path(connection_info)
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@utils.synchronized(export_path)
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def inner():
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return f(inst, connection_info, *args, **kwargs)
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return inner()
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return wrapper
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def _get_export_path(self, connection_info):
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return connection_info['data']['export'].replace('/', '\\')
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@export_path_synchronized
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def attach_volume(self, *args, **kwargs):
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super(SMBFSVolumeDriver, self).attach_volume(*args, **kwargs)
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@export_path_synchronized
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def disconnect_volume(self, *args, **kwargs):
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# We synchronize those operations based on the share path in order to
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# avoid the situation when a SMB share is unmounted while a volume
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# exported by it is about to be attached to an instance.
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super(SMBFSVolumeDriver, self).disconnect_volume(*args, **kwargs)
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def set_disk_qos_specs(self, connection_info, qos_specs):
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supported_qos_specs = ['total_iops_sec', 'total_bytes_sec']
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VolumeOps.validate_qos_specs(qos_specs, supported_qos_specs)
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total_bytes_sec = int(qos_specs.get('total_bytes_sec') or 0)
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total_iops_sec = int(qos_specs.get('total_iops_sec') or
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VolumeOps.bytes_per_sec_to_iops(
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total_bytes_sec))
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if total_iops_sec:
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disk_path = self.get_disk_resource_path(connection_info)
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self._vmutils.set_disk_qos_specs(disk_path, total_iops_sec)
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class FCVolumeDriver(BaseVolumeDriver):
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_is_block_dev = True
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_protocol = constants.STORAGE_PROTOCOL_FC
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