1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
|
# Copyright 2013 Cloudbase Solutions Srl
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import sys
if sys.platform == 'win32':
import wmi
from nova import exception
from nova.openstack.common.gettextutils import _
from nova.openstack.common import log as logging
from nova.virt.hyperv import vmutils
from nova.virt.hyperv import vmutilsv2
from nova.virt.hyperv import volumeutilsv2
LOG = logging.getLogger(__name__)
class LiveMigrationUtils(object):
def __init__(self):
self._vmutils = vmutilsv2.VMUtilsV2()
self._volutils = volumeutilsv2.VolumeUtilsV2()
def _get_conn_v2(self, host='localhost'):
try:
return wmi.WMI(moniker='//%s/root/virtualization/v2' % host)
except wmi.x_wmi as ex:
LOG.exception(ex)
if ex.com_error.hresult == -2147217394:
msg = (_('Live migration is not supported on target host "%s"')
% host)
elif ex.com_error.hresult == -2147023174:
msg = (_('Target live migration host "%s" is unreachable')
% host)
else:
msg = _('Live migration failed: %s') % ex.message
raise vmutils.HyperVException(msg)
def check_live_migration_config(self):
conn_v2 = self._get_conn_v2()
migration_svc = conn_v2.Msvm_VirtualSystemMigrationService()[0]
vsmssds = migration_svc.associators(
wmi_association_class='Msvm_ElementSettingData',
wmi_result_class='Msvm_VirtualSystemMigrationServiceSettingData')
vsmssd = vsmssds[0]
if not vsmssd.EnableVirtualSystemMigration:
raise vmutils.HyperVException(
_('Live migration is not enabled on this host'))
if not migration_svc.MigrationServiceListenerIPAddressList:
raise vmutils.HyperVException(
_('Live migration networks are not configured on this host'))
def _get_vm(self, conn_v2, vm_name):
vms = conn_v2.Msvm_ComputerSystem(ElementName=vm_name)
n = len(vms)
if not n:
raise exception.NotFound(_('VM not found: %s') % vm_name)
elif n > 1:
raise vmutils.HyperVException(_('Duplicate VM name found: %s')
% vm_name)
return vms[0]
def _destroy_planned_vm(self, conn_v2_remote, planned_vm):
LOG.debug(_("Destroying existing remote planned VM: %s"),
planned_vm.ElementName)
vs_man_svc = conn_v2_remote.Msvm_VirtualSystemManagementService()[0]
(job_path, ret_val) = vs_man_svc.DestroySystem(planned_vm.path_())
self._vmutils.check_ret_val(ret_val, job_path)
def _check_existing_planned_vm(self, conn_v2_remote, vm):
# Make sure that there's not yet a remote planned VM on the target
# host for this VM
planned_vms = conn_v2_remote.Msvm_PlannedComputerSystem(Name=vm.Name)
if planned_vms:
self._destroy_planned_vm(conn_v2_remote, planned_vms[0])
def _create_remote_planned_vm(self, conn_v2_local, conn_v2_remote,
vm, rmt_ip_addr_list, dest_host):
# Staged
vsmsd = conn_v2_local.query("select * from "
"Msvm_VirtualSystemMigrationSettingData "
"where MigrationType = 32770")[0]
vsmsd.DestinationIPAddressList = rmt_ip_addr_list
migration_setting_data = vsmsd.GetText_(1)
LOG.debug(_("Creating remote planned VM for VM: %s"),
vm.ElementName)
migr_svc = conn_v2_local.Msvm_VirtualSystemMigrationService()[0]
(job_path, ret_val) = migr_svc.MigrateVirtualSystemToHost(
ComputerSystem=vm.path_(),
DestinationHost=dest_host,
MigrationSettingData=migration_setting_data)
self._vmutils.check_ret_val(ret_val, job_path)
return conn_v2_remote.Msvm_PlannedComputerSystem(Name=vm.Name)[0]
def _get_physical_disk_paths(self, vm_name):
ide_ctrl_path = self._vmutils.get_vm_ide_controller(vm_name, 0)
ide_paths = self._vmutils.get_controller_volume_paths(ide_ctrl_path)
scsi_ctrl_path = self._vmutils.get_vm_scsi_controller(vm_name)
scsi_paths = self._vmutils.get_controller_volume_paths(scsi_ctrl_path)
return dict(ide_paths.items() + scsi_paths.items())
def _get_remote_disk_data(self, vmutils_remote, disk_paths, dest_host):
volutils_remote = volumeutilsv2.VolumeUtilsV2(dest_host)
disk_paths_remote = {}
iscsi_targets = []
for (rasd_rel_path, disk_path) in disk_paths.items():
(target_iqn,
target_lun) = self._volutils.get_target_from_disk_path(disk_path)
iscsi_targets.append((target_iqn, target_lun))
dev_num = volutils_remote.get_device_number_for_target(target_iqn,
target_lun)
disk_path_remote = vmutils_remote.get_mounted_disk_by_drive_number(
dev_num)
disk_paths_remote[rasd_rel_path] = disk_path_remote
return (disk_paths_remote, iscsi_targets)
def _update_planned_vm_disk_resources(self, vmutils_remote, conn_v2_remote,
planned_vm, vm_name,
disk_paths_remote):
vm_settings = planned_vm.associators(
wmi_association_class='Msvm_SettingsDefineState',
wmi_result_class='Msvm_VirtualSystemSettingData')[0]
updated_resource_setting_data = []
sasds = vm_settings.associators(
wmi_association_class='Msvm_VirtualSystemSettingDataComponent')
for sasd in sasds:
if (sasd.ResourceType == 17 and sasd.ResourceSubType ==
"Microsoft:Hyper-V:Physical Disk Drive" and
sasd.HostResource):
# Replace the local disk target with the correct remote one
old_disk_path = sasd.HostResource[0]
new_disk_path = disk_paths_remote.pop(sasd.path().RelPath)
LOG.debug(_("Replacing host resource "
"%(old_disk_path)s with "
"%(new_disk_path)s on planned VM %(vm_name)s"),
{'old_disk_path': old_disk_path,
'new_disk_path': new_disk_path,
'vm_name': vm_name})
sasd.HostResource = [new_disk_path]
updated_resource_setting_data.append(sasd.GetText_(1))
LOG.debug(_("Updating remote planned VM disk paths for VM: %s"),
vm_name)
vsmsvc = conn_v2_remote.Msvm_VirtualSystemManagementService()[0]
(res_settings, job_path, ret_val) = vsmsvc.ModifyResourceSettings(
ResourceSettings=updated_resource_setting_data)
vmutils_remote.check_ret_val(ret_val, job_path)
def _get_vhd_setting_data(self, vm):
vm_settings = vm.associators(
wmi_association_class='Msvm_SettingsDefineState',
wmi_result_class='Msvm_VirtualSystemSettingData')[0]
new_resource_setting_data = []
sasds = vm_settings.associators(
wmi_association_class='Msvm_VirtualSystemSettingDataComponent',
wmi_result_class='Msvm_StorageAllocationSettingData')
for sasd in sasds:
if (sasd.ResourceType == 31 and sasd.ResourceSubType ==
"Microsoft:Hyper-V:Virtual Hard Disk"):
#sasd.PoolId = ""
new_resource_setting_data.append(sasd.GetText_(1))
return new_resource_setting_data
def _live_migrate_vm(self, conn_v2_local, vm, planned_vm, rmt_ip_addr_list,
new_resource_setting_data, dest_host):
# VirtualSystemAndStorage
vsmsd = conn_v2_local.query("select * from "
"Msvm_VirtualSystemMigrationSettingData "
"where MigrationType = 32771")[0]
vsmsd.DestinationIPAddressList = rmt_ip_addr_list
if planned_vm:
vsmsd.DestinationPlannedVirtualSystemId = planned_vm.Name
migration_setting_data = vsmsd.GetText_(1)
migr_svc = conn_v2_local.Msvm_VirtualSystemMigrationService()[0]
LOG.debug(_("Starting live migration for VM: %s"), vm.ElementName)
(job_path, ret_val) = migr_svc.MigrateVirtualSystemToHost(
ComputerSystem=vm.path_(),
DestinationHost=dest_host,
MigrationSettingData=migration_setting_data,
NewResourceSettingData=new_resource_setting_data)
self._vmutils.check_ret_val(ret_val, job_path)
def _get_remote_ip_address_list(self, conn_v2_remote, dest_host):
LOG.debug(_("Getting live migration networks for remote host: %s"),
dest_host)
migr_svc_rmt = conn_v2_remote.Msvm_VirtualSystemMigrationService()[0]
return migr_svc_rmt.MigrationServiceListenerIPAddressList
def live_migrate_vm(self, vm_name, dest_host):
self.check_live_migration_config()
conn_v2_local = self._get_conn_v2()
conn_v2_remote = self._get_conn_v2(dest_host)
vm = self._get_vm(conn_v2_local, vm_name)
self._check_existing_planned_vm(conn_v2_remote, vm)
rmt_ip_addr_list = self._get_remote_ip_address_list(conn_v2_remote,
dest_host)
iscsi_targets = []
planned_vm = None
disk_paths = self._get_physical_disk_paths(vm_name)
if disk_paths:
vmutils_remote = vmutilsv2.VMUtilsV2(dest_host)
(disk_paths_remote,
iscsi_targets) = self._get_remote_disk_data(vmutils_remote,
disk_paths,
dest_host)
planned_vm = self._create_remote_planned_vm(conn_v2_local,
conn_v2_remote,
vm, rmt_ip_addr_list,
dest_host)
self._update_planned_vm_disk_resources(vmutils_remote,
conn_v2_remote, planned_vm,
vm_name, disk_paths_remote)
new_resource_setting_data = self._get_vhd_setting_data(vm)
self._live_migrate_vm(conn_v2_local, vm, planned_vm, rmt_ip_addr_list,
new_resource_setting_data, dest_host)
# In case the caller wants to log off the targets after migration
return iscsi_targets
|
