602 lines
27 KiB
Python
602 lines
27 KiB
Python
# Copyright (c) 2013 Hewlett-Packard Development Company, L.P.
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# Copyright (c) 2012 VMware, Inc.
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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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from oslo_log import log as logging
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from oslo_vmware import exceptions as oslo_vmw_exceptions
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from oslo_vmware import vim_util as vutil
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from nova.compute import power_state
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import nova.conf
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from nova import exception
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from nova.i18n import _
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from nova.virt.vmwareapi import constants
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from nova.virt.vmwareapi import vm_util
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CONF = nova.conf.CONF
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LOG = logging.getLogger(__name__)
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class VMwareVolumeOps(object):
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"""Management class for Volume-related tasks."""
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def __init__(self, session, cluster=None):
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self._session = session
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self._cluster = cluster
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def attach_disk_to_vm(self, vm_ref, instance,
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adapter_type, disk_type, vmdk_path=None,
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disk_size=None, linked_clone=False,
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device_name=None, disk_io_limits=None):
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"""Attach disk to VM by reconfiguration."""
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instance_name = instance.name
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client_factory = self._session.vim.client.factory
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devices = self._session._call_method(vutil,
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"get_object_property",
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vm_ref,
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"config.hardware.device")
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(controller_key, unit_number,
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controller_spec) = vm_util.allocate_controller_key_and_unit_number(
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client_factory,
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devices,
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adapter_type)
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vmdk_attach_config_spec = vm_util.get_vmdk_attach_config_spec(
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client_factory, disk_type, vmdk_path,
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disk_size, linked_clone, controller_key,
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unit_number, device_name, disk_io_limits)
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if controller_spec:
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vmdk_attach_config_spec.deviceChange.append(controller_spec)
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LOG.debug("Reconfiguring VM instance %(instance_name)s to attach "
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"disk %(vmdk_path)s or device %(device_name)s with type "
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"%(disk_type)s",
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{'instance_name': instance_name, 'vmdk_path': vmdk_path,
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'device_name': device_name, 'disk_type': disk_type},
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instance=instance)
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vm_util.reconfigure_vm(self._session, vm_ref, vmdk_attach_config_spec)
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LOG.debug("Reconfigured VM instance %(instance_name)s to attach "
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"disk %(vmdk_path)s or device %(device_name)s with type "
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"%(disk_type)s",
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{'instance_name': instance_name, 'vmdk_path': vmdk_path,
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'device_name': device_name, 'disk_type': disk_type},
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instance=instance)
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def _update_volume_details(self, vm_ref, volume_uuid, device_uuid):
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# Store the uuid of the volume_device
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volume_option = 'volume-%s' % volume_uuid
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extra_opts = {volume_option: device_uuid}
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client_factory = self._session.vim.client.factory
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extra_config_specs = vm_util.get_vm_extra_config_spec(
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client_factory, extra_opts)
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vm_util.reconfigure_vm(self._session, vm_ref, extra_config_specs)
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def _get_volume_uuid(self, vm_ref, volume_uuid):
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prop = 'config.extraConfig["volume-%s"]' % volume_uuid
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opt_val = self._session._call_method(vutil,
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'get_object_property',
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vm_ref,
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prop)
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if opt_val is not None:
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return opt_val.value
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def detach_disk_from_vm(self, vm_ref, instance, device,
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destroy_disk=False):
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"""Detach disk from VM by reconfiguration."""
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instance_name = instance.name
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client_factory = self._session.vim.client.factory
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vmdk_detach_config_spec = vm_util.get_vmdk_detach_config_spec(
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client_factory, device, destroy_disk)
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disk_key = device.key
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LOG.debug("Reconfiguring VM instance %(instance_name)s to detach "
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"disk %(disk_key)s",
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{'instance_name': instance_name, 'disk_key': disk_key},
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instance=instance)
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vm_util.reconfigure_vm(self._session, vm_ref, vmdk_detach_config_spec)
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LOG.debug("Reconfigured VM instance %(instance_name)s to detach "
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"disk %(disk_key)s",
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{'instance_name': instance_name, 'disk_key': disk_key},
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instance=instance)
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def _iscsi_get_target(self, data):
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"""Return the iSCSI Target given a volume info."""
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target_portal = data['target_portal']
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target_iqn = data['target_iqn']
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host_mor = vm_util.get_host_ref(self._session, self._cluster)
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lst_properties = ["config.storageDevice.hostBusAdapter",
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"config.storageDevice.scsiTopology",
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"config.storageDevice.scsiLun"]
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prop_dict = self._session._call_method(vutil,
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"get_object_properties_dict",
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host_mor,
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lst_properties)
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result = (None, None)
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hbas_ret = None
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scsi_topology = None
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scsi_lun_ret = None
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if prop_dict:
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hbas_ret = prop_dict.get('config.storageDevice.hostBusAdapter')
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scsi_topology = prop_dict.get('config.storageDevice.scsiTopology')
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scsi_lun_ret = prop_dict.get('config.storageDevice.scsiLun')
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# Meaning there are no host bus adapters on the host
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if hbas_ret is None:
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return result
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host_hbas = hbas_ret.HostHostBusAdapter
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if not host_hbas:
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return result
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for hba in host_hbas:
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if hba.__class__.__name__ == 'HostInternetScsiHba':
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hba_key = hba.key
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break
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else:
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return result
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if scsi_topology is None:
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return result
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host_adapters = scsi_topology.adapter
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if not host_adapters:
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return result
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scsi_lun_key = None
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for adapter in host_adapters:
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if adapter.adapter == hba_key:
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if not getattr(adapter, 'target', None):
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return result
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for target in adapter.target:
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if (getattr(target.transport, 'address', None) and
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target.transport.address[0] == target_portal and
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target.transport.iScsiName == target_iqn):
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if not target.lun:
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return result
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for lun in target.lun:
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if 'host.ScsiDisk' in lun.scsiLun:
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scsi_lun_key = lun.scsiLun
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break
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break
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break
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if scsi_lun_key is None:
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return result
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if scsi_lun_ret is None:
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return result
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host_scsi_luns = scsi_lun_ret.ScsiLun
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if not host_scsi_luns:
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return result
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for scsi_lun in host_scsi_luns:
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if scsi_lun.key == scsi_lun_key:
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return (scsi_lun.deviceName, scsi_lun.uuid)
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return result
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def _iscsi_add_send_target_host(self, storage_system_mor, hba_device,
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target_portal):
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"""Adds the iscsi host to send target host list."""
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client_factory = self._session.vim.client.factory
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send_tgt = client_factory.create('ns0:HostInternetScsiHbaSendTarget')
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(send_tgt.address, send_tgt.port) = target_portal.split(':')
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LOG.debug("Adding iSCSI host %s to send targets", send_tgt.address)
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self._session._call_method(
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self._session.vim, "AddInternetScsiSendTargets",
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storage_system_mor, iScsiHbaDevice=hba_device, targets=[send_tgt])
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def _iscsi_rescan_hba(self, target_portal):
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"""Rescan the iSCSI HBA to discover iSCSI targets."""
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host_mor = vm_util.get_host_ref(self._session, self._cluster)
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storage_system_mor = self._session._call_method(
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vutil,
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"get_object_property",
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host_mor,
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"configManager.storageSystem")
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hbas_ret = self._session._call_method(
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vutil,
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"get_object_property",
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storage_system_mor,
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"storageDeviceInfo.hostBusAdapter")
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# Meaning there are no host bus adapters on the host
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if hbas_ret is None:
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return
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host_hbas = hbas_ret.HostHostBusAdapter
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if not host_hbas:
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return
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for hba in host_hbas:
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if hba.__class__.__name__ == 'HostInternetScsiHba':
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hba_device = hba.device
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if target_portal:
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# Check if iscsi host is already in the send target host
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# list
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send_targets = getattr(hba, 'configuredSendTarget', [])
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send_tgt_portals = ['%s:%s' % (s.address, s.port) for s in
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send_targets]
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if target_portal not in send_tgt_portals:
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self._iscsi_add_send_target_host(storage_system_mor,
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hba_device,
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target_portal)
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break
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else:
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return
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LOG.debug("Rescanning HBA %s", hba_device)
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self._session._call_method(self._session.vim,
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"RescanHba", storage_system_mor, hbaDevice=hba_device)
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LOG.debug("Rescanned HBA %s ", hba_device)
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def _iscsi_discover_target(self, data):
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"""Get iSCSI target, rescanning the HBA if necessary."""
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target_portal = data['target_portal']
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target_iqn = data['target_iqn']
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LOG.debug("Discovering iSCSI target %(target_iqn)s from "
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"%(target_portal)s.",
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{'target_iqn': target_iqn, 'target_portal': target_portal})
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device_name, uuid = self._iscsi_get_target(data)
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if device_name:
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LOG.debug("Storage target found. No need to discover")
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return (device_name, uuid)
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# Rescan iSCSI HBA with iscsi target host
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self._iscsi_rescan_hba(target_portal)
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# Find iSCSI Target again
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device_name, uuid = self._iscsi_get_target(data)
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if device_name:
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LOG.debug("Discovered iSCSI target %(target_iqn)s from "
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"%(target_portal)s.",
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{'target_iqn': target_iqn,
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'target_portal': target_portal})
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else:
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LOG.debug("Unable to discovered iSCSI target %(target_iqn)s "
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"from %(target_portal)s.",
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{'target_iqn': target_iqn,
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'target_portal': target_portal})
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return (device_name, uuid)
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def _iscsi_get_host_iqn(self, instance):
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"""Return the host iSCSI IQN."""
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try:
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host_mor = vm_util.get_host_ref_for_vm(self._session, instance)
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except exception.InstanceNotFound:
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host_mor = vm_util.get_host_ref(self._session, self._cluster)
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hbas_ret = self._session._call_method(
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vutil,
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"get_object_property",
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host_mor,
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"config.storageDevice.hostBusAdapter")
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# Meaning there are no host bus adapters on the host
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if hbas_ret is None:
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return
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host_hbas = hbas_ret.HostHostBusAdapter
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if not host_hbas:
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return
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for hba in host_hbas:
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if hba.__class__.__name__ == 'HostInternetScsiHba':
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return hba.iScsiName
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def get_volume_connector(self, instance):
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"""Return volume connector information."""
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try:
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vm_ref = vm_util.get_vm_ref(self._session, instance)
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except exception.InstanceNotFound:
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vm_ref = None
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iqn = self._iscsi_get_host_iqn(instance)
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connector = {'ip': CONF.vmware.host_ip,
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'initiator': iqn,
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'host': CONF.vmware.host_ip}
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if vm_ref:
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connector['instance'] = vutil.get_moref_value(vm_ref)
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return connector
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def _get_volume_ref(self, volume_ref_name):
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"""Get the volume moref from the ref name."""
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return vutil.get_moref(volume_ref_name, 'VirtualMachine')
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def _get_vmdk_base_volume_device(self, volume_ref):
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# Get the vmdk file name that the VM is pointing to
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hardware_devices = self._session._call_method(
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vutil,
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"get_object_property",
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volume_ref,
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"config.hardware.device")
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return vm_util.get_vmdk_volume_disk(hardware_devices)
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def _attach_volume_vmdk(self, connection_info, instance,
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adapter_type=None):
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"""Attach vmdk volume storage to VM instance."""
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vm_ref = vm_util.get_vm_ref(self._session, instance)
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LOG.debug("_attach_volume_vmdk: %s", connection_info,
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instance=instance)
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data = connection_info['data']
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volume_ref = self._get_volume_ref(data['volume'])
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# Get details required for adding disk device such as
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# adapter_type, disk_type
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vmdk = vm_util.get_vmdk_info(self._session, volume_ref)
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adapter_type = adapter_type or vmdk.adapter_type
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# IDE does not support disk hotplug
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if adapter_type == constants.ADAPTER_TYPE_IDE:
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state = vm_util.get_vm_state(self._session, instance)
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if state != power_state.SHUTDOWN:
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raise exception.Invalid(_('%s does not support disk '
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'hotplug.') % adapter_type)
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# Attach the disk to virtual machine instance
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self.attach_disk_to_vm(vm_ref, instance, adapter_type, vmdk.disk_type,
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vmdk_path=vmdk.path)
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# Store the uuid of the volume_device
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self._update_volume_details(vm_ref, data['volume_id'],
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vmdk.device.backing.uuid)
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LOG.debug("Attached VMDK: %s", connection_info, instance=instance)
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def _attach_volume_iscsi(self, connection_info, instance,
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adapter_type=None):
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"""Attach iscsi volume storage to VM instance."""
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vm_ref = vm_util.get_vm_ref(self._session, instance)
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# Attach Volume to VM
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LOG.debug("_attach_volume_iscsi: %s", connection_info,
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instance=instance)
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data = connection_info['data']
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# Discover iSCSI Target
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device_name = self._iscsi_discover_target(data)[0]
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if device_name is None:
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raise exception.StorageError(
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reason=_("Unable to find iSCSI Target"))
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if adapter_type is None:
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# Get the vmdk file name that the VM is pointing to
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hardware_devices = self._session._call_method(
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vutil, "get_object_property", vm_ref, "config.hardware.device")
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adapter_type = vm_util.get_scsi_adapter_type(hardware_devices)
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self.attach_disk_to_vm(vm_ref, instance,
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adapter_type, 'rdmp',
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device_name=device_name)
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LOG.debug("Attached ISCSI: %s", connection_info, instance=instance)
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def attach_volume(self, connection_info, instance, adapter_type=None):
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"""Attach volume storage to VM instance."""
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driver_type = connection_info['driver_volume_type']
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LOG.debug("Volume attach. Driver type: %s", driver_type,
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instance=instance)
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if driver_type == constants.DISK_FORMAT_VMDK:
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self._attach_volume_vmdk(connection_info, instance, adapter_type)
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elif driver_type == constants.DISK_FORMAT_ISCSI:
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self._attach_volume_iscsi(connection_info, instance, adapter_type)
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else:
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raise exception.VolumeDriverNotFound(driver_type=driver_type)
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def _get_host_of_vm(self, vm_ref):
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"""Get the ESX host of given VM."""
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return self._session._call_method(vutil, 'get_object_property',
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vm_ref, 'runtime').host
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def _get_res_pool_of_host(self, host):
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"""Get the resource pool of given host's cluster."""
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# Get the compute resource, the host belongs to
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compute_res = self._session._call_method(vutil,
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'get_object_property',
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host,
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'parent')
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# Get resource pool from the compute resource
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return self._session._call_method(vutil,
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'get_object_property',
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compute_res,
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'resourcePool')
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def _get_res_pool_of_vm(self, vm_ref):
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"""Get resource pool to which the VM belongs."""
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# Get the host, the VM belongs to
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host = self._get_host_of_vm(vm_ref)
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# Get the resource pool of host's cluster.
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return self._get_res_pool_of_host(host)
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def _consolidate_vmdk_volume(self, instance, vm_ref, device, volume_ref,
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adapter_type=None, disk_type=None):
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"""Consolidate volume backing VMDK files if needed.
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The volume's VMDK file attached to an instance can be moved by SDRS
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if enabled on the cluster.
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By this the VMDK files can get copied onto another datastore and the
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copy on this new location will be the latest version of the VMDK file.
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So at the time of detach, we need to consolidate the current backing
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VMDK file with the VMDK file in the new location.
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We need to ensure that the VMDK chain (snapshots) remains intact during
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the consolidation. SDRS retains the chain when it copies VMDK files
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over, so for consolidation we relocate the backing with move option
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as moveAllDiskBackingsAndAllowSharing and then delete the older version
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of the VMDK file attaching the new version VMDK file.
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In the case of a volume boot the we need to ensure that the volume
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is on the datastore of the instance.
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"""
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original_device = self._get_vmdk_base_volume_device(volume_ref)
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original_device_path = original_device.backing.fileName
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current_device_path = device.backing.fileName
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if original_device_path == current_device_path:
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# The volume is not moved from its original location.
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# No consolidation is required.
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LOG.debug("The volume has not been displaced from "
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"its original location: %s. No consolidation "
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"needed.", current_device_path)
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return
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# The volume has been moved from its original location.
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# Need to consolidate the VMDK files.
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LOG.info("The volume's backing has been relocated to %s. Need to "
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"consolidate backing disk file.", current_device_path)
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# Pick the host and resource pool on which the instance resides.
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# Move the volume to the datastore where the new VMDK file is present.
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host = self._get_host_of_vm(vm_ref)
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res_pool = self._get_res_pool_of_host(host)
|
|
datastore = device.backing.datastore
|
|
detached = False
|
|
LOG.debug("Relocating volume's backing: %(backing)s to resource "
|
|
"pool: %(rp)s, datastore: %(ds)s, host: %(host)s.",
|
|
{'backing': volume_ref, 'rp': res_pool, 'ds': datastore,
|
|
'host': host})
|
|
try:
|
|
vm_util.relocate_vm(self._session, volume_ref, res_pool, datastore,
|
|
host)
|
|
except oslo_vmw_exceptions.FileNotFoundException:
|
|
# Volume's vmdk was moved; remove the device so that we can
|
|
# relocate the volume.
|
|
LOG.warning("Virtual disk: %s of volume's backing not found.",
|
|
original_device_path, exc_info=True)
|
|
LOG.debug("Removing disk device of volume's backing and "
|
|
"reattempting relocate.")
|
|
self.detach_disk_from_vm(volume_ref, instance, original_device)
|
|
detached = True
|
|
vm_util.relocate_vm(self._session, volume_ref, res_pool, datastore,
|
|
host)
|
|
|
|
# Volume's backing is relocated now; detach the old vmdk if not done
|
|
# already.
|
|
if not detached:
|
|
try:
|
|
self.detach_disk_from_vm(volume_ref, instance,
|
|
original_device, destroy_disk=True)
|
|
except oslo_vmw_exceptions.FileNotFoundException:
|
|
LOG.debug("Original volume backing %s is missing, no need "
|
|
"to detach it", original_device.backing.fileName)
|
|
|
|
# Attach the current volume to the volume_ref
|
|
self.attach_disk_to_vm(volume_ref, instance,
|
|
adapter_type, disk_type,
|
|
vmdk_path=current_device_path)
|
|
|
|
def _get_vmdk_backed_disk_device(self, vm_ref, connection_info_data):
|
|
# Get the vmdk file name that the VM is pointing to
|
|
hardware_devices = self._session._call_method(vutil,
|
|
"get_object_property",
|
|
vm_ref,
|
|
"config.hardware.device")
|
|
|
|
# Get disk uuid
|
|
disk_uuid = self._get_volume_uuid(vm_ref,
|
|
connection_info_data['volume_id'])
|
|
device = vm_util.get_vmdk_backed_disk_device(hardware_devices,
|
|
disk_uuid)
|
|
if not device:
|
|
raise exception.DiskNotFound(message=_("Unable to find volume"))
|
|
return device
|
|
|
|
def _detach_volume_vmdk(self, connection_info, instance):
|
|
"""Detach volume storage to VM instance."""
|
|
vm_ref = vm_util.get_vm_ref(self._session, instance)
|
|
# Detach Volume from VM
|
|
LOG.debug("_detach_volume_vmdk: %s", connection_info,
|
|
instance=instance)
|
|
data = connection_info['data']
|
|
volume_ref = self._get_volume_ref(data['volume'])
|
|
|
|
device = self._get_vmdk_backed_disk_device(vm_ref, data)
|
|
|
|
hardware_devices = vm_util.get_hardware_devices(self._session, vm_ref)
|
|
adapter_type = None
|
|
for hw_device in hardware_devices:
|
|
if hw_device.key == device.controllerKey:
|
|
adapter_type = vm_util.CONTROLLER_TO_ADAPTER_TYPE.get(
|
|
hw_device.__class__.__name__)
|
|
break
|
|
|
|
# IDE does not support disk hotplug
|
|
if adapter_type == constants.ADAPTER_TYPE_IDE:
|
|
state = vm_util.get_vm_state(self._session, instance)
|
|
if state != power_state.SHUTDOWN:
|
|
raise exception.Invalid(_('%s does not support disk '
|
|
'hotplug.') % adapter_type)
|
|
|
|
disk_type = vm_util._get_device_disk_type(device)
|
|
|
|
self._consolidate_vmdk_volume(instance, vm_ref, device, volume_ref,
|
|
adapter_type=adapter_type,
|
|
disk_type=disk_type)
|
|
|
|
self.detach_disk_from_vm(vm_ref, instance, device)
|
|
|
|
# Remove key-value pair <volume_id, vmdk_uuid> from instance's
|
|
# extra config. Setting value to empty string will remove the key.
|
|
self._update_volume_details(vm_ref, data['volume_id'], "")
|
|
|
|
LOG.debug("Detached VMDK: %s", connection_info, instance=instance)
|
|
|
|
def _detach_volume_iscsi(self, connection_info, instance):
|
|
"""Detach volume storage to VM instance."""
|
|
vm_ref = vm_util.get_vm_ref(self._session, instance)
|
|
# Detach Volume from VM
|
|
LOG.debug("_detach_volume_iscsi: %s", connection_info,
|
|
instance=instance)
|
|
data = connection_info['data']
|
|
|
|
# Discover iSCSI Target
|
|
device_name, uuid = self._iscsi_get_target(data)
|
|
if device_name is None:
|
|
raise exception.StorageError(
|
|
reason=_("Unable to find iSCSI Target"))
|
|
|
|
# Get the vmdk file name that the VM is pointing to
|
|
hardware_devices = self._session._call_method(vutil,
|
|
"get_object_property",
|
|
vm_ref,
|
|
"config.hardware.device")
|
|
device = vm_util.get_rdm_disk(hardware_devices, uuid)
|
|
if device is None:
|
|
raise exception.DiskNotFound(message=_("Unable to find volume"))
|
|
self.detach_disk_from_vm(vm_ref, instance, device, destroy_disk=True)
|
|
LOG.debug("Detached ISCSI: %s", connection_info, instance=instance)
|
|
|
|
def detach_volume(self, connection_info, instance):
|
|
"""Detach volume storage to VM instance."""
|
|
driver_type = connection_info['driver_volume_type']
|
|
LOG.debug("Volume detach. Driver type: %s", driver_type,
|
|
instance=instance)
|
|
if driver_type == constants.DISK_FORMAT_VMDK:
|
|
self._detach_volume_vmdk(connection_info, instance)
|
|
elif driver_type == constants.DISK_FORMAT_ISCSI:
|
|
self._detach_volume_iscsi(connection_info, instance)
|
|
else:
|
|
raise exception.VolumeDriverNotFound(driver_type=driver_type)
|
|
|
|
def attach_root_volume(self, connection_info, instance,
|
|
datastore, adapter_type=None):
|
|
"""Attach a root volume to the VM instance."""
|
|
driver_type = connection_info['driver_volume_type']
|
|
LOG.debug("Root volume attach. Driver type: %s", driver_type,
|
|
instance=instance)
|
|
if driver_type == constants.DISK_FORMAT_VMDK:
|
|
vm_ref = vm_util.get_vm_ref(self._session, instance)
|
|
data = connection_info['data']
|
|
# Get the volume ref
|
|
volume_ref = self._get_volume_ref(data['volume'])
|
|
# Pick the resource pool on which the instance resides. Move the
|
|
# volume to the datastore of the instance.
|
|
res_pool = self._get_res_pool_of_vm(vm_ref)
|
|
vm_util.relocate_vm(self._session, volume_ref, res_pool, datastore)
|
|
|
|
self.attach_volume(connection_info, instance, adapter_type)
|