rwcal/plugins/vala/rwcal_openstack/rift/rwcal/openstack/utils/compute.py

   1 #!/usr/bin/python
   2
   3 #
   4 #   Copyright 2017 RIFT.IO Inc
   5 #
   6 #   Licensed under the Apache License, Version 2.0 (the "License");
   7 #   you may not use this file except in compliance with the License.
   8 #   You may obtain a copy of the License at
   9 #
  10 #       http://www.apache.org/licenses/LICENSE-2.0
  11 #
  12 #   Unless required by applicable law or agreed to in writing, software
  13 #   distributed under the License is distributed on an "AS IS" BASIS,
  14 #   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  15 #   See the License for the specific language governing permissions and
  16 #   limitations under the License.
  17 #
  18 import uuid
  19 import gi
  20 gi.require_version('RwcalYang', '1.0')
  21 from gi.repository import RwcalYang
  22
  23
  24 class ImageValidateError(Exception):
  25     pass
  26
  27 class VolumeValidateError(Exception):
  28     pass
  29
  30 class AffinityGroupError(Exception):
  31     pass
  32
  33
  34 class ComputeUtils(object):
  35     """
  36     Utility class for compute operations
  37     """
  38     epa_types = ['vm_flavor',
  39                  'guest_epa',
  40                  'host_epa',
  41                  'host_aggregate',
  42                  'hypervisor_epa',
  43                  'vswitch_epa']
  44     def __init__(self, driver):
  45         """
  46         Constructor for class
  47         Arguments:
  48            driver: object of OpenstackDriver()
  49         """
  50         self._driver = driver
  51         self.log = driver.log
  52
  53     @property
  54     def driver(self):
  55         return self._driver
  56
  57     def search_vdu_flavor(self, vdu_params):
  58         """
  59         Function to search a matching flavor for VDU instantiation
  60         from already existing flavors
  61
  62         Arguments:
  63           vdu_params: Protobuf GI object RwcalYang.VDUInitParams()
  64
  65         Returns:
  66            flavor_id(string): Flavor id for VDU instantiation
  67            None if no flavor could be found
  68         """
  69         kwargs = { 'vcpus': vdu_params.vm_flavor.vcpu_count,
  70                    'ram'  : vdu_params.vm_flavor.memory_mb,
  71                    'disk' : vdu_params.vm_flavor.storage_gb,}
  72
  73         flavors = self.driver.nova_flavor_find(**kwargs)
  74         flavor_list = list()
  75         for flv in flavors:
  76             flavor_list.append(self.driver.utils.flavor.parse_flavor_info(flv))
  77
  78         flavor_id = self.driver.utils.flavor.match_resource_flavor(vdu_params, flavor_list)
  79         return flavor_id
  80
  81     def select_vdu_flavor(self, vdu_params):
  82         """
  83         This function attempts to find a pre-existing flavor matching required
  84         parameters for VDU instantiation. If no such flavor is found, a new one
  85         is created.
  86
  87         Arguments:
  88           vdu_params: Protobuf GI object RwcalYang.VDUInitParams()
  89
  90         Returns:
  91            flavor_id(string): Flavor id for VDU instantiation
  92         """
  93         flavor_id = self.search_vdu_flavor(vdu_params)
  94         if flavor_id is not None:
  95             self.log.info("Found flavor with id: %s matching requirements for VDU: %s",
  96                           flavor_id, vdu_params.name)
  97             return flavor_id
  98
  99         flavor = RwcalYang.FlavorInfoItem()
 100         flavor.name = str(uuid.uuid4())
 101
 102         epa_dict = { k: v for k, v in vdu_params.as_dict().items()
 103                      if k in ComputeUtils.epa_types }
 104
 105         flavor.from_dict(epa_dict)
 106
 107         flavor_id = self.driver.nova_flavor_create(name      = flavor.name,
 108                                                    ram       = flavor.vm_flavor.memory_mb,
 109                                                    vcpus     = flavor.vm_flavor.vcpu_count,
 110                                                    disk      = flavor.vm_flavor.storage_gb,
 111                                                    epa_specs = self.driver.utils.flavor.get_extra_specs(flavor))
 112         return flavor_id
 113
 114     def make_vdu_flavor_args(self, vdu_params):
 115         """
 116         Creates flavor related arguments for VDU operation
 117         Arguments:
 118           vdu_params: Protobuf GI object RwcalYang.VDUInitParams()
 119
 120         Returns:
 121            A dictionary {'flavor_id': <flavor-id>}
 122         """
 123         return {'flavor_id': self.select_vdu_flavor(vdu_params)}
 124
 125
 126     def make_vdu_image_args(self, vdu_params):
 127         """
 128         Creates image related arguments for VDU operation
 129         Arguments:
 130           vdu_params: Protobuf GI object RwcalYang.VDUInitParams()
 131
 132         Returns:
 133            A dictionary {'image_id': <image-id>}
 134
 135         """
 136         kwargs = dict()
 137         if vdu_params.has_field('image_name'):
 138             kwargs['image_id'] = self.resolve_image_n_validate(vdu_params.image_name,
 139                                                                vdu_params.image_checksum)
 140         elif vdu_params.has_field('image_id'):
 141             kwargs['image_id'] = vdu_params.image_id
 142
 143         return kwargs
 144
 145     def resolve_image_n_validate(self, image_name, checksum = None):
 146         """
 147         Resolve the image_name to image-object by matching image_name and checksum
 148
 149         Arguments:
 150           image_name (string): Name of image
 151           checksums  (string): Checksum associated with image
 152
 153         Raises ImageValidateError in case of Errors
 154         """
 155         image_info = [ i for i in self.driver._glance_image_list if i['name'] == image_name]
 156
 157         if not image_info:
 158             self.log.error("No image with name: %s found", image_name)
 159             raise ImageValidateError("No image with name %s found" %(image_name))
 160
 161         for image in image_info:
 162             if 'status' not in image or image['status'] != 'active':
 163                 self.log.error("Image %s not in active state. Current state: %s",
 164                                image_name, image['status'])
 165                 raise ImageValidateError("Image with name %s found in incorrect (%s) state"
 166                                          %(image_name, image['status']))
 167             if not checksum or checksum == image['checksum']:
 168                 break
 169         else:
 170             self.log.info("No image found with matching name: %s and checksum: %s",
 171                           image_name, checksum)
 172             raise ImageValidateError("No image found with matching name: %s and checksum: %s"
 173                                      %(image_name, checksum))
 174         return image['id']
 175
 176     def make_vdu_volume_args(self, volume, vdu_params):
 177         """
 178         Arguments:
 179            volume:   Protobuf GI object RwcalYang.VDUInitParams_Volumes()
 180            vdu_params: Protobuf GI object RwcalYang.VDUInitParams()
 181
 182         Returns:
 183            A dictionary required to create volume for VDU
 184
 185         Raises VolumeValidateError in case of Errors
 186         """
 187         kwargs = dict()
 188
 189         if volume.has_field('volume_ref'):
 190             self.log.error("Unsupported option <Volume Reference> found for volume: %s", volume.name)
 191             raise VolumeValidateError("Unsupported option <Volume Reference> found for volume: %s"
 192                                       %(volume.name))
 193
 194         kwargs['boot_index'] = volume.boot_priority
 195         if volume.has_field("image"):
 196             # Support image->volume
 197             kwargs['source_type'] = "image"
 198             kwargs['uuid'] = self.resolve_image_n_validate(volume.image, volume.image_checksum)
 199         else:
 200             # Support blank->volume
 201             kwargs['source_type'] = "blank"
 202         kwargs['device_name'] = volume.name
 203         kwargs['destination_type'] = "volume"
 204         kwargs['volume_size'] = volume.size
 205         kwargs['delete_on_termination'] = True
 206
 207         if volume.has_field('device_type'):
 208             if volume.device_type in ['cdrom', 'disk']:
 209                 kwargs['device_type'] = volume.device_type
 210             else:
 211                 self.log.error("Unsupported device_type <%s> found for volume: %s",
 212                                volume.device_type, volume.name)
 213                 raise VolumeValidateError("Unsupported device_type <%s> found for volume: %s"
 214                                           %(volume.device_type, volume.name))
 215         else:
 216             self.log.error("Mandatory field <device_type> not specified for volume: %s",
 217                            volume.name)
 218             raise VolumeValidateError("Mandatory field <device_type> not specified for volume: %s"
 219                                       %(volume.name))
 220
 221         if volume.has_field('device_bus'):
 222             if volume.device_bus in ['ide', 'virtio', 'scsi']:
 223                 kwargs['disk_bus'] = volume.device_bus
 224             else:
 225                 self.log.error("Unsupported device_bus <%s> found for volume: %s",
 226                                volume.device_bus, volume.name)
 227                 raise VolumeValidateError("Unsupported device_bus <%s> found for volume: %s"
 228                                           %(volume.device_bus, volume.name))
 229         else:
 230             self.log.error("Mandatory field <device_bus> not specified for volume: %s",
 231                            volume.name)
 232             raise VolumeValidateError("Mandatory field <device_bus> not specified for volume: %s"
 233                                       %(volume.name))
 234
 235         return kwargs
 236
 237     def make_vdu_storage_args(self, vdu_params):
 238         """
 239         Creates volume related arguments for VDU operation
 240
 241         Arguments:
 242           vdu_params: Protobuf GI object RwcalYang.VDUInitParams()
 243
 244         Returns:
 245            A dictionary required for volumes creation for VDU instantiation
 246         """
 247         kwargs = dict()
 248         if vdu_params.has_field('volumes'):
 249             kwargs['block_device_mapping_v2'] = list()
 250             # Ignore top-level image
 251             kwargs['image_id']  = ""
 252             for volume in vdu_params.volumes:
 253                 kwargs['block_device_mapping_v2'].append(self.make_vdu_volume_args(volume, vdu_params))
 254         return kwargs
 255
 256     def make_vdu_network_args(self, vdu_params):
 257         """
 258         Creates VDU network related arguments for VDU operation
 259         Arguments:
 260           vdu_params: Protobuf GI object RwcalYang.VDUInitParams()
 261
 262         Returns:
 263            A dictionary {'port_list' : [ports], 'network_list': [networks]}
 264
 265         """
 266         kwargs = dict()
 267         kwargs['port_list'], kwargs['network_list'] = self.driver.utils.network.setup_vdu_networking(vdu_params)
 268         return kwargs
 269
 270
 271     def make_vdu_boot_config_args(self, vdu_params):
 272         """
 273         Creates VDU boot config related arguments for VDU operation
 274         Arguments:
 275           vdu_params: Protobuf GI object RwcalYang.VDUInitParams()
 276
 277         Returns:
 278           A dictionary {
 279                          'userdata'    :  <cloud-init> ,
 280                          'config_drive':  True/False,
 281                          'files'       :  [ file name ],
 282                          'metadata'    :  <metadata string>
 283         }
 284         """
 285         kwargs = dict()
 286         metadata = dict()
 287
 288         if vdu_params.has_field('node_id'):
 289             metadata['rift_node_id'] = vdu_params.node_id
 290             kwargs['metadata'] = metadata
 291
 292         if vdu_params.has_field('vdu_init') and vdu_params.vdu_init.has_field('userdata'):
 293             kwargs['userdata'] = vdu_params.vdu_init.userdata
 294         else:
 295             kwargs['userdata'] = ''
 296
 297         if not vdu_params.has_field('supplemental_boot_data'):
 298             return kwargs
 299
 300         if vdu_params.supplemental_boot_data.has_field('config_file'):
 301             files = dict()
 302             for cf in vdu_params.supplemental_boot_data.config_file:
 303                 files[cf.dest] = cf.source
 304             kwargs['files'] = files
 305
 306         if vdu_params.supplemental_boot_data.has_field('boot_data_drive'):
 307             kwargs['config_drive'] = vdu_params.supplemental_boot_data.boot_data_drive
 308         else:
 309             kwargs['config_drive'] = False
 310
 311         try:
 312             # Rift model only
 313             if vdu_params.supplemental_boot_data.has_field('custom_meta_data'):
 314                 metadata = dict()
 315                 for cm in vdu_params.supplemental_boot_data.custom_meta_data:
 316                     metadata[cm.name] = cm.value
 317                     kwargs['metadata'] = metadata
 318         except Exception as e:
 319             pass
 320
 321         return kwargs
 322
 323     def _select_affinity_group(self, group_name):
 324         """
 325         Selects the affinity group based on name and return its id
 326         Arguments:
 327           group_name (string): Name of the Affinity/Anti-Affinity group
 328         Returns:
 329           Id of the matching group
 330
 331         Raises exception AffinityGroupError if no matching group is found
 332         """
 333         groups = [g['id'] for g in self.driver._nova_affinity_group if g['name'] == group_name]
 334         if not groups:
 335             self.log.error("No affinity/anti-affinity group with name: %s found", group_name)
 336             raise AffinityGroupError("No affinity/anti-affinity group with name: %s found" %(group_name))
 337         return groups[0]
 338
 339
 340     def make_vdu_server_placement_args(self, vdu_params):
 341         """
 342         Function to create kwargs required for nova server placement
 343
 344         Arguments:
 345           vdu_params: Protobuf GI object RwcalYang.VDUInitParams()
 346
 347         Returns:
 348          A dictionary { 'availability_zone' : < Zone >, 'scheduler_hints': <group-id> }
 349
 350         """
 351         kwargs = dict()
 352
 353         if vdu_params.has_field('availability_zone') \
 354            and vdu_params.availability_zone.has_field('name'):
 355             kwargs['availability_zone']  = vdu_params.availability_zone
 356
 357         if vdu_params.has_field('server_group'):
 358             kwargs['scheduler_hints'] = {
 359                 'group': self._select_affinity_group(vdu_params.server_group)
 360             }
 361         return kwargs
 362
 363     def make_vdu_server_security_args(self, vdu_params, account):
 364         """
 365         Function to create kwargs required for nova security group
 366
 367         Arguments:
 368           vdu_params: Protobuf GI object RwcalYang.VDUInitParams()
 369           account: Protobuf GI object RwcalYang.CloudAccount()
 370
 371         Returns:
 372           A dictionary {'security_groups' : < group > }
 373         """
 374         kwargs = dict()
 375         if account.openstack.security_groups:
 376             kwargs['security_groups'] = account.openstack.security_groups
 377         return kwargs
 378
 379
 380     def make_vdu_create_args(self, vdu_params, account):
 381         """
 382         Function to create kwargs required for nova_server_create API
 383
 384         Arguments:
 385           vdu_params: Protobuf GI object RwcalYang.VDUInitParams()
 386           account: Protobuf GI object RwcalYang.CloudAccount()
 387
 388         Returns:
 389           A kwargs dictionary for VDU create operation
 390         """
 391         kwargs = dict()
 392
 393         kwargs['name'] = vdu_params.name
 394
 395         kwargs.update(self.make_vdu_flavor_args(vdu_params))
 396         kwargs.update(self.make_vdu_storage_args(vdu_params))
 397         kwargs.update(self.make_vdu_image_args(vdu_params))
 398         kwargs.update(self.make_vdu_network_args(vdu_params))
 399         kwargs.update(self.make_vdu_boot_config_args(vdu_params))
 400         kwargs.update(self.make_vdu_server_placement_args(vdu_params))
 401         kwargs.update(self.make_vdu_server_security_args(vdu_params, account))
 402         return kwargs
 403
 404
 405     def _parse_vdu_mgmt_address_info(self, vm_info):
 406         """
 407         Get management_ip and public_ip for VDU
 408
 409         Arguments:
 410           vm_info : A dictionary object return by novaclient library listing VM attributes
 411
 412         Returns:
 413           A tuple of mgmt_ip (string) and public_ip (string)
 414         """
 415         mgmt_ip = None
 416         public_ip = None
 417         if 'addresses' in vm_info:
 418             for network_name, network_info in vm_info['addresses'].items():
 419                 if network_info and network_name == self.driver.mgmt_network:
 420                     for interface in network_info:
 421                         if 'OS-EXT-IPS:type' in interface:
 422                             if interface['OS-EXT-IPS:type'] == 'fixed':
 423                                 mgmt_ip = interface['addr']
 424                             elif interface['OS-EXT-IPS:type'] == 'floating':
 425                                 public_ip = interface['addr']
 426         return (mgmt_ip, public_ip)
 427
 428     def get_vdu_epa_info(self, vm_info):
 429         """
 430         Get flavor information (including EPA) for VDU
 431
 432         Arguments:
 433           vm_info : A dictionary returned by novaclient library listing VM attributes
 434         Returns:
 435           flavor_info: A dictionary object returned by novaclient library listing flavor attributes
 436         """
 437         if 'flavor' in vm_info and 'id' in vm_info['flavor']:
 438             try:
 439                 flavor_info = self.driver.nova_flavor_get(vm_info['flavor']['id'])
 440                 return flavor_info
 441             except Exception as e:
 442                 self.log.exception("Exception %s occured during get-flavor", str(e))
 443         return dict()
 444
 445     def _parse_vdu_cp_info(self, vdu_id):
 446         """
 447         Get connection point information for VDU identified by vdu_id
 448         Arguments:
 449         vdu_id (string) : VDU Id (vm_info['id'])
 450         Returns:
 451         A List of object RwcalYang.VDUInfoParams_ConnectionPoints()
 452
 453         """
 454         cp_list = []
 455         # Fill the port information
 456         port_list = self.driver.neutron_port_list(**{'device_id': vdu_id})
 457         for port in port_list:
 458             cp_info = self.driver.utils.network._parse_cp(port)
 459             cp = RwcalYang.VDUInfoParams_ConnectionPoints()
 460             cp.from_dict(cp_info.as_dict())
 461             cp_list.append(cp)
 462         return cp_list
 463
 464     def _parse_vdu_state_info(self, vm_info):
 465         """
 466         Get VDU state information
 467
 468         Arguments:
 469           vm_info : A dictionary returned by novaclient library listing VM attributes
 470
 471         Returns:
 472           state (string): State of the VDU
 473         """
 474         if 'status' in vm_info:
 475             if vm_info['status'] == 'ACTIVE':
 476                 vdu_state = 'active'
 477             elif vm_info['status'] == 'ERROR':
 478                 vdu_state = 'failed'
 479             else:
 480                 vdu_state = 'inactive'
 481         else:
 482             vdu_state = 'unknown'
 483         return vdu_state
 484
 485     def _parse_vdu_server_group_info(self, vm_info):
 486         """
 487         Get VDU server group information
 488         Arguments:
 489           vm_info : A dictionary returned by novaclient library listing VM attributes
 490
 491         Returns:
 492           server_group_name (string): Name of the server group to which VM belongs, else empty string
 493
 494         """
 495         server_group = [ v['name']
 496                          for v in self.driver.nova_server_group_list()
 497                          if vm_info['id'] in v['members'] ]
 498         if server_group:
 499             return server_group[0]
 500         else:
 501             return str()
 502
 503     def _parse_vdu_boot_config_data(self, vm_info):
 504         """
 505         Parses VDU supplemental boot data
 506         Arguments:
 507           vm_info : A dictionary returned by novaclient library listing VM attributes
 508
 509         Returns:
 510           List of RwcalYang.VDUInfoParams_SupplementalBootData()
 511         """
 512         supplemental_boot_data = None
 513         node_id = None
 514         if 'config_drive' in vm_info:
 515             supplemental_boot_data = RwcalYang.VDUInfoParams_SupplementalBootData()
 516             supplemental_boot_data.boot_data_drive = vm_info['config_drive']
 517         # Look for any metadata
 518         if 'metadata' not in vm_info:
 519             return node_id, supplemental_boot_data
 520         if supplemental_boot_data is None:
 521             supplemental_boot_data = RwcalYang.VDUInfoParams_SupplementalBootData()
 522         for key, value in vm_info['metadata'].items():
 523             if key == 'rift_node_id':
 524                 node_id = value
 525             else:
 526                 try:
 527                     # rift only
 528                     cm = supplemental_boot_data.custom_meta_data.add()
 529                     cm.name = key
 530                     cm.value = str(value)
 531                 except Exception as e:
 532                     pass
 533         return node_id, supplemental_boot_data
 534
 535     def _parse_vdu_volume_info(self, vm_info):
 536         """
 537         Get VDU server group information
 538         Arguments:
 539           vm_info : A dictionary returned by novaclient library listing VM attributes
 540
 541         Returns:
 542           List of RwcalYang.VDUInfoParams_Volumes()
 543         """
 544         volumes = list()
 545
 546         try:
 547             volume_list = self.driver.nova_volume_list(vm_info['id'])
 548         except Exception as e:
 549             self.log.exception("Exception %s occured during nova-volume-list", str(e))
 550             return volumes
 551
 552         for v in volume_list:
 553             volume = RwcalYang.VDUInfoParams_Volumes()
 554             try:
 555                 volume.name = (v['device']).split('/')[2]
 556                 volume.volume_id = v['volumeId']
 557                 details = self.driver.cinder_volume_get(volume.volume_id)
 558                 for k, v in details.metadata.items():
 559                     vd = volume.custom_meta_data.add()
 560                     vd.name = k
 561                     vd.value = v
 562             except Exception as e:
 563                 self.log.exception("Exception %s occured during volume list parsing", str(e))
 564                 continue
 565             else:
 566                 volumes.append(volume)
 567         return volumes
 568
 569     def _parse_vdu_console_url(self, vm_info):
 570         """
 571         Get VDU console URL
 572         Arguments:
 573           vm_info : A dictionary returned by novaclient library listing VM attributes
 574
 575         Returns:
 576           console_url(string): Console URL for VM
 577         """
 578         console_url = None
 579         if self._parse_vdu_state_info(vm_info) == 'active':
 580             try:
 581                 serv_console_url = self.driver.nova_server_console(vm_info['id'])
 582                 if 'console' in serv_console_url:
 583                     console_url = serv_console_url['console']['url']
 584                 else:
 585                     self.log.error("Error fetching console url. This could be an Openstack issue. Console : " + str(serv_console_url))
 586
 587
 588             except Exception as e:
 589                 self.log.exception("Exception %s occured during volume list parsing", str(e))
 590         return console_url
 591
 592     def parse_cloud_vdu_info(self, vm_info):
 593         """
 594         Parse vm_info dictionary (return by python-client) and put values in GI object for VDU
 595
 596         Arguments:
 597            vm_info : A dictionary object return by novaclient library listing VM attributes
 598
 599         Returns:
 600            Protobuf GI Object of type RwcalYang.VDUInfoParams()
 601         """
 602         vdu = RwcalYang.VDUInfoParams()
 603         vdu.name = vm_info['name']
 604         vdu.vdu_id = vm_info['id']
 605         vdu.cloud_type  = 'openstack'
 606
 607         if 'config_drive' in vm_info:
 608             vdu.supplemental_boot_data.boot_data_drive = vm_info['config_drive']
 609
 610         if 'image' in vm_info and 'id' in vm_info['image']:
 611             vdu.image_id = vm_info['image']['id']
 612
 613         if 'availability_zone' in vm_info:
 614             vdu.availability_zone = vm_info['availability_zone']
 615
 616         vdu.state = self._parse_vdu_state_info(vm_info)
 617         management_ip,public_ip = self._parse_vdu_mgmt_address_info(vm_info)
 618
 619         if management_ip:
 620             vdu.management_ip = management_ip
 621
 622         if public_ip:
 623             vdu.public_ip = public_ip
 624
 625         if 'flavor' in vm_info and 'id' in vm_info['flavor']:
 626             vdu.flavor_id = vm_info['flavor']['id']
 627             flavor_info = self.get_vdu_epa_info(vm_info)
 628             vm_flavor = self.driver.utils.flavor.parse_vm_flavor_epa_info(flavor_info)
 629             guest_epa = self.driver.utils.flavor.parse_guest_epa_info(flavor_info)
 630             host_epa = self.driver.utils.flavor.parse_host_epa_info(flavor_info)
 631             host_aggregates = self.driver.utils.flavor.parse_host_aggregate_epa_info(flavor_info)
 632
 633             vdu.vm_flavor.from_dict(vm_flavor.as_dict())
 634             vdu.guest_epa.from_dict(guest_epa.as_dict())
 635             vdu.host_epa.from_dict(host_epa.as_dict())
 636             for aggr in host_aggregates:
 637                 ha = vdu.host_aggregate.add()
 638                 ha.from_dict(aggr.as_dict())
 639
 640         vdu.node_id, vdu.supplemental_boot_data = self._parse_vdu_boot_config_data(vm_info)
 641
 642         cp_list = self._parse_vdu_cp_info(vdu.vdu_id)
 643         for cp in cp_list:
 644             vdu.connection_points.append(cp)
 645
 646         vdu.server_group.name = self._parse_vdu_server_group_info(vm_info)
 647
 648         for v in self._parse_vdu_volume_info(vm_info):
 649             vdu.volumes.append(v)
 650
 651         vdu.console_url = self._parse_vdu_console_url(vm_info)
 652         return vdu
 653
 654
 655     def perform_vdu_network_cleanup(self, vdu_id):
 656         """
 657         This function cleans up networking resources related to VDU
 658         Arguments:
 659            vdu_id(string): VDU id
 660         Returns:
 661            None
 662         """
 663         ### Get list of floating_ips associated with this instance and delete them
 664         floating_ips = [ f for f in self.driver.nova_floating_ip_list() if f.instance_id == vdu_id ]
 665         for f in floating_ips:
 666             self.driver.nova_floating_ip_delete(f)
 667
 668         ### Get list of port on VM and delete them.
 669         port_list = self.driver.neutron_port_list(**{'device_id': vdu_id})
 670
 671         for port in port_list:
 672             if ((port['device_owner'] == 'compute:None') or (port['device_owner'] == '')):
 673                 self.driver.neutron_port_delete(port['id'])
 674