lcm/ns/serializers/update_serializers.py

   1 # Copyright (c) 2018, CMCC Technologies Co., Ltd.
   2
   3 # Licensed under the Apache License, Version 2.0 (the "License")
   4 # you may not use this file except in compliance with the License.
   5 # You may obtain a copy of the License at
   6
   7 # http://www.apache.org/licenses/LICENSE-2.0
   8
   9 # Unless required by applicable law or agreed to in writing, software
  10 # distributed under the License is distributed on an "AS IS" BASIS,
  11 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 # See the License for the specific language governing permissions and
  13 # limitations under the License.
  14
  15 from rest_framework import serializers
  16
  17 from lcm.ns.serializers.pub_serializers import IpAddressSerialzier
  18 from lcm.ns.serializers.pub_serializers import CpProtocolDataSerializer
  19 from lcm.ns.serializers.create_ns_serializers import ResourceHandleSerializer
  20
  21
  22 class VnfInstanceDataSerializer(serializers.Serializer):
  23     vnfInstanceId = serializers.CharField(help_text="Specify the target NS instance where the VNF instances are "
  24                                                     "moved to", required=True)
  25     vnfProfileId = serializers.CharField(help_text="Specify the VNF instance that is moved.",
  26                                          required=False, allow_null=True)
  27
  28
  29 class InstantiateVnfDataSerializer(serializers.Serializer):
  30     vnfdId = serializers.CharField(help_text="Information sufficient to identify the VNFD which defines the VNF to be"
  31                                              " instantiated. ", required=True)
  32     vnfFlavourId = serializers.CharField(help_text="Identifier of the VNF deployment flavour to be instantiated.",
  33                                          required=True)
  34     vnfInstantiationLevelId = serializers.CharField(help_text="Identifier of the instantiation level of the deployment "
  35                                                               "flavour to be instantiated. ", required=False,
  36                                                     allow_null=True)
  37     vnfInstanceName = serializers.CharField(help_text="Human-readable name of the VNF instance to be created.",
  38                                             required=False, allow_null=True)
  39
  40
  41 class IpOverEthernetAddressDataSerializer(serializers.Serializer):
  42     macAddress = serializers.CharField(help_text="Mac address", required=False, allow_null=True)
  43     ipAddresses = IpAddressSerialzier(help_text="List of IP addresses to assign to the extCP instance.",
  44                                       required=False, allow_null=True, many=True)
  45
  46
  47 class VnfExtCpConfigSerializer(serializers.Serializer):
  48     cpInstanceId = serializers.CharField(help_text="Identifier of the external CP instance to which this set of "
  49                                                    "configuration parameters is requested to be applied.",
  50                                          required=False, allow_null=True)
  51     linkPortId = serializers.CharField(help_text="Identifier of a pre-conFigured link port to which the external CP "
  52                                                  "will be associated.", required=False, allow_null=True)
  53     cpProtocolData = serializers.ListField(help_text="Parameters for configuring the network protocols on the link "
  54                                                      "port that connects the CP to a VL",
  55                                            child=(CpProtocolDataSerializer(help_text="This type represents network "
  56                                                                                      "protocol data.", required=True)),
  57                                            required=False, allow_null=True)
  58
  59
  60 class VnfExtCpData(serializers.Serializer):
  61     cpdId = serializers.CharField(help_text="The identifier of the CPD in the VNFD.", required=True)
  62     cpConfig = serializers.ListField(help_text="List of instance data that need to be conFigured on the CP instances "
  63                                                "created from the respective CPD.",
  64                                      child=(VnfExtCpConfigSerializer(help_text="Config of vnf ext cp", required=True)),
  65                                      required=False, allow_null=True)
  66
  67
  68 # class ResourceHandleSerializer(serializers.Serializer):
  69 #     vimId = serializers.CharField(help_text="Identifier of the VIM under whose control this resource is placed.",
  70 #                                   required=False, allow_null=True)
  71 #     resourceProviderId = serializers.CharField(help_text="Identifier of the entity responsible for the management of "
  72 #                                                          "the resource.", required=False, allow_null=True)
  73 #     resourceId = serializers.CharField(help_text="Identifier of the resource in the scope of the VIM or the "
  74 #                                                  "resource provider.", required=True)
  75 #     vimLevelResourceType = serializers.CharField(help_text="Type of the resource in the scope of the VIM or the "
  76 #                                                            "resource provider.", required=False, allow_null=True)
  77
  78
  79 class ExtLinkPortDataSerializer(serializers.Serializer):
  80     id = serializers.CharField(help_text="Provided by the entity that has created the link port", required=True)
  81     resourceHandle = ResourceHandleSerializer(help_text="Identifier(s) of the virtualised network resource(s) "
  82                                                         "realizing the VL instance", required=True)
  83
  84
  85 class ExtVirtualLinkDataSerializer(serializers.Serializer):
  86     extVirtualLinkId = serializers.CharField(help_text="The identifier of the external VL instance, if provided. ",
  87                                              required=False, allow_null=True)
  88     vimId = serializers.CharField(help_text="Identifier of the VIM that manages this resource.",
  89                                   required=False, allow_null=True)
  90     resourceProviderId = serializers.CharField(help_text="Identifies the entity responsible for the management of "
  91                                                          "this resource.", required=False, allow_null=True)
  92     resourceId = serializers.CharField(help_text="The identifier of the resource in the scope of the VIM or the"
  93                                                  " resource provider.", required=True)
  94     extCps = serializers.ListField(child=VnfExtCpData(help_text="External CPs of the VNF to be connected to this external "
  95                                                       "VL.", required=True), required=False, allow_null=True)
  96     extLinkPorts = serializers.ListField(help_text="Externally provided link ports to be used to connect external "
  97                                                    "connection points to this external VL. ",
  98                                          child=(ExtLinkPortDataSerializer(help_text="This type represents an externally"
  99                                                                                     "provided link port to be used to "
 100                                                                                     "connect a VNF external connection "
 101                                                                                     "point to an external VL",
 102                                                                           required=True)),
 103                                          required=False, allow_null=True)
 104
 105
 106 class ExtManagedVirtualLinkDataSerializer(serializers.Serializer):
 107     extManagedVirtualLinkId = serializers.CharField(help_text="The identifier of the externally-managed internal VL "
 108                                                               "instance,if provided.", required=False, allow_null=True)
 109     virtualLinkDescId = serializers.CharField(help_text="The identifier of the VLD in the VNFD for this VL.",
 110                                               required=True)
 111
 112     vimId = serializers.CharField(help_text="Identifier of the VIMthat manage this resource.",
 113                                   required=False, allow_null=True)
 114
 115     resourceProviderId = serializers.CharField(help_text="Identifies the entity responsible for the management of"
 116                                                          "this resource.", required=False, allow_null=True)
 117     resourceId = serializers.CharField(help_text="The identifier of the resource in the scope of the VIM or"
 118                                                  "the resource provider.", required=True)
 119
 120
 121 class ChangeVnfFlavourDataSerizlizer(serializers.Serializer):
 122     vnfInstanceId = serializers.CharField(help_text="Identifier of the VNF instance to be modified.", required=True)
 123     newFlavourId = serializers.CharField(help_text="Identifier of the VNF deployment flavour to be instantiated.",
 124                                          required=True)
 125     instantiationLevelId = serializers.CharField(help_text="Identifier of the instantiation level of the deployment "
 126                                                            "flavour to be instantiated.",
 127                                                  required=False, allow_null=True)
 128     extVirtualLinks = serializers.ListField(help_text="Information about external VLs to connect the VNF to.",
 129                                             child=(ExtVirtualLinkDataSerializer(help_text="This type represents "
 130                                                                                           "an external VL",
 131                                                                                 required=True)),
 132                                             required=False, allow_null=True)
 133     extManagedVirtualLinks = serializers.ListField(help_text="Information about internal VLs that are managed by NFVO",
 134                                                    child=ExtManagedVirtualLinkDataSerializer(
 135                                                        help_text="This type represents an externally-managed internal"
 136                                                                  "VL.", required=True), required=False, allow_null=True)
 137     additionalParams = serializers.CharField(help_text="Additional input parameters for the flavour change process",
 138                                              required=False, allow_null=True)
 139
 140
 141 class OperationalStatesSerializer(serializers.Serializer):
 142     OperationalStates = serializers.ChoiceField(help_text="State of operation",
 143                                                 choices=["STARTED", "STOPPED"])
 144
 145
 146 class StopTypeSerializer(serializers.Serializer):
 147     StopType = serializers.ChoiceField(help_text="Type of stop", choices=["FORCEFUL", "GRACEFUL"])
 148
 149
 150 class OperateVnfDataSerializer(serializers.Serializer):
 151     vnfInstanceId = serializers.CharField(help_text="Identifier of the VNF instance.", required=True)
 152     changeStateTo = OperationalStatesSerializer(help_text="The desired operational state to change the VNF to.",
 153                                                 required=True)
 154     stopType = StopTypeSerializer(help_text="It signals whether forceful or graceful stop is requested.",
 155                                   required=False, allow_null=True)
 156     gracefulStopTimeout = serializers.CharField(help_text="The time interval to wait for the VNF to be taken out of"
 157                                                           "service during graceful stop.",
 158                                                 required=False, allow_null=True)
 159
 160
 161 class ModifyVnfInfoDataSerializer(serializers.Serializer):
 162     vnfInstanceId = serializers.CharField(help_text="Identifier of the VNF instance", required=True)
 163     vnfInstanceName = serializers.CharField(help_text="New value of the vnfInstanceName attribute in VnfInstance",
 164                                             required=False, allow_null=True)
 165     vnfInstanceDescription = serializers.CharField(help_text="New value of the vnfInstanceDescription attribute in"
 166                                                              "VnfInstance", required=False, allow_null=True)
 167
 168
 169 class ChangeExtVnfConnectivityDataSerializer(serializers.Serializer):
 170     vnfInstanceId = serializers.CharField(help_text="Identifier of the VNF instance.", required=True, allow_null=True)
 171     extVirtualLinks = serializers.ListField(help_text="Information about external VLs to change",
 172                                             child=(ExtVirtualLinkDataSerializer(
 173                                                 help_text="Data of ext virtual link", required=True)),
 174                                             required=False, allow_null=True)
 175     additionalParams = serializers.CharField(help_text="Additional parameters passed by the OSS as input to the "
 176                                                        "external connectivity change process",
 177                                              required=False, allow_null=True)
 178
 179
 180 class SapDataSerializer(serializers.Serializer):
 181     sapdId = serializers.CharField(help_text="Reference to the SAPD for this SAP.", required=True)
 182     sapName = serializers.CharField(help_text="Human readable name for the SAP.", required=True)
 183     description = serializers.CharField(help_text="Human readable description for the SAP. ", required=True)
 184     sapProtocolData = serializers.ListField(help_text="Parameters for configuring the network protocols on the SAP.",
 185                                             child=(CpProtocolDataSerializer(
 186                                                 help_text="This type represents network protocol data.", required=True)),
 187                                             required=False, allow_null=True)
 188
 189
 190 class AssocNewNsdVersionDataSerializer(serializers.Serializer):
 191     newNsdId = serializers.CharField(help_text="Identifier of the new NSD version that is to be associated to the NS "
 192                                                "instance. ", required=True)
 193
 194
 195 class MoveVnfInstanceDataSerializer(serializers.Serializer):
 196     targetNsInstanceId = serializers.CharField(help_text="Specify the target NS instance where the VNF instances "
 197                                                          "are moved to.", required=True)
 198     vnfInstanceId = serializers.CharField(help_text="Specify the VNF instance that is moved.",
 199                                           required=False, allow_null=True)
 200
 201
 202 class NsCpHandleSerializer(serializers.Serializer):
 203     vnfInstanceId = serializers.CharField(help_text="Identifier of the VNF instance associated to the CP instance.",
 204                                           required=False, allow_null=True)
 205     vnfExtCpInstanceId = serializers.CharField(help_text="Identifier of the VNF external CP instance in the scope "
 206                                                          "of the VNF instance. ", required=False, allow_null=True)
 207     pnfInfoId = serializers.CharField(help_text="Identifier of the PNF instance associated to the CP instance.",
 208                                       required=False, allow_null=True)
 209     pnfExtCpInstanceId = serializers.CharField(help_text="Identifier of the PNF external CP instance in the scope "
 210                                                          "of the PNF.", required=False, allow_null=True)
 211     nsInstanceId = serializers.CharField(help_text="Identifier of the NS instance associated to the SAP instance.",
 212                                          required=False, allow_null=True)
 213     nsSapInstanceId = serializers.CharField(help_text="Identifier of the SAP instance in the scope of the NS instance",
 214                                             required=False, allow_null=True)
 215
 216
 217 class PortRangeSerializer(serializers.Serializer):
 218     lowerPort = serializers.CharField(help_text="Identifies the lower bound of the port range. ", required=True)
 219     upperPort = serializers.CharField(help_text="Identifies the upper bound of the port range ", required=True)
 220
 221
 222 class MaskSerializer(serializers.Serializer):
 223     startingPoint = serializers.CharField(help_text="Indicates the offset between the last bit of the source mac "
 224                                                     "address and the first bit of the sequence of bits to "
 225                                                     "be matched.", required=True)
 226     length = serializers.CharField(help_text="Indicates the number of bits to be matched. ", required=True)
 227     value = serializers.CharField(help_text="Provide the sequence of bit values to be matched. ", required=True)
 228
 229
 230 class NfpRuleSerializer(serializers.Serializer):
 231     etherDestinationAddress = serializers.CharField(help_text="Indicates a destination Mac address ",
 232                                                     required=False, allow_null=True)
 233     etherSourceAddress = serializers.CharField(help_text="Indicates a source Mac address",
 234                                                required=False, allow_null=True)
 235     etherType = serializers.ChoiceField(help_text="Indicates the protocol carried over the Ethernet layer.",
 236                                         choices=["IPV4", "IPV6"], required=False, allow_null=True)
 237     vlanTag = serializers.CharField(help_text="Indicates a VLAN identifier in an IEEE 802.1Q-2014 tag [6] ",
 238                                     required=False, allow_null=True)
 239     protocol = serializers.ChoiceField(help_text="Indicates the L4 protocol",
 240                                        choices=["TCP", "UDP", "ICMP"], required=False, allow_null=True)
 241     dscp = serializers.CharField(help_text="For IPv4 [7] a string of 0 and 1 digits that corresponds to the 6-bit "
 242                                            "Differentiated Services Code Point (DSCP) field of the IP header",
 243                                  required=False, allow_null=True)
 244     sourcePortRange = PortRangeSerializer(help_text="Indicates a range of source ports. ",
 245                                           required=False, allow_null=True)
 246     destinationPortRange = PortRangeSerializer(help_text="Indicates a range of destination ports.",
 247                                                required=False, allow_null=True)
 248     sourceIpAddressPrefix = serializers.CharField(
 249         help_text="Prefix of source ip address", required=False, allow_null=True)
 250     destinationIpAddressPrefix = serializers.CharField(
 251         help_text="Prefix of destination ip address", required=False, allow_null=True)
 252     extendedCriteria = serializers.ListField(help_text="Indicates values of specific bits in a frame.",
 253                                              child=(MaskSerializer(help_text="Mask serializer", required=True)),
 254                                              required=False, allow_null=True)
 255
 256
 257 class NfpDataSerializer(serializers.Serializer):
 258     nfpInfoId = serializers.CharField(help_text="Identifier of the NFP to be modified.",
 259                                       required=False, allow_null=True)
 260     nfpName = serializers.CharField(help_text="Human readable name for the NFP.", required=False, allow_null=True)
 261     description = serializers.CharField(help_text="Human readable description for the NFP",
 262                                         required=False, allow_null=True)
 263     nsCpHandle = serializers.ListField(help_text="HanIdentifier(s) of the CPs and SAPs which the NFP passes by.",
 264                                        child=(NsCpHandleSerializer(
 265                                            help_text="This type represents an identifier of the CP or SAP instance.",
 266                                            required=True)), required=False, allow_null=True)
 267     nfpRule = NfpRuleSerializer(help_text="NFP classification and selection rule.", required=False, allow_null=True)
 268
 269
 270 class UpdateVnffgDataSerializer(serializers.Serializer):
 271     vnffgInfoId = serializers.CharField(help_text="Identifier of an existing VNFFG to be updated for the NS Instance.",
 272                                         required=True)
 273     nfp = serializers.ListField(help_text="nfp", child=(NfpDataSerializer(help_text="This type contains information "
 274                                                                                     "used to create or modify NFP "
 275                                                                                     "instance parameters for the update"
 276                                                                                     "of an existing VNFFG instance. ",
 277                                                                           required=True)),
 278                                 required=False, allow_null=True)
 279     nfpInfoId = serializers.ListField(help_text="Identifier(s) of the NFP to be deleted from a given VNFFG.",
 280                                       required=False, allow_null=True)
 281
 282
 283 class ChangeNsFlavourDataSerializer(serializers.Serializer):
 284     newNsFlavourId = serializers.CharField(
 285         help_text="Identifier of the new NS DF to apply to this NS instance.", required=True)
 286     instantiationLevelId = serializers.CharField(
 287         help_text="Identifier of the instantiation level of the deployment flavour to be instantiated.",
 288         required=False, allow_null=True)
 289
 290
 291 class IdentifierInPnfSerializer(serializers.Serializer):
 292     IdentifierInPnf = serializers.Serializer(help_text="An Identifier that is unique within respect to a PNF.")
 293
 294
 295 class IdentifierInNsdSerializer(serializers.Serializer):
 296     IdentifierInNsd = serializers.Serializer(help_text="An identifier that is unique within a NS descriptor")
 297
 298
 299 class PnfExtCpDataSerializer(serializers.Serializer):
 300     cpInstanceI16 = IdentifierInPnfSerializer(help_text="Identifier of the CP. Shall be present for existing CP.",
 301                                               required=False, allow_null=True)
 302     cpdId = IdentifierInNsdSerializer(help_text="Identifier of the Connection Point Descriptor (CPD) for this CP",
 303                                       required=False, allow_null=True)
 304     cpProtocolData = CpProtocolDataSerializer(help_text="Address assigned for this CP.",
 305                                               required=False, allow_null=True, many=True)
 306
 307
 308 class AddPnfDataSerializer(serializers.Serializer):
 309     pnfId = serializers.CharField(help_text="Identifier of the PNF.", required=True)
 310     pnfName = serializers.CharField(help_text="Name of the PNF.", required=True)
 311     pnfdId = serializers.CharField(help_text="Identifier of the PNFD on which the PNF is based.", required=True)
 312     pnfProfileId = serializers.CharField(
 313         help_text="Identifier of related PnfProfile in the NSD on which the PNF is based.", required=True)
 314     cpData = PnfExtCpDataSerializer(help_text="Address assigned for the PNF external CP(s). ",
 315                                     required=False, allow_null=True, many=True)
 316
 317
 318 class ModifyPnfDataSerializer(serializers.Serializer):
 319     pnfId = serializers.CharField(help_text="Identifier of the PNF.", required=True)
 320     pnfName = serializers.CharField(help_text="Name of the PNF", required=False, allow_null=True)
 321     cpData = serializers.ListField(
 322         help_text="Address assigned for the PNF external CP(s).",
 323         child=(PnfExtCpDataSerializer(
 324             help_text="This type represents the configuration data on the external CP of the PNF.")),
 325         required=False, allow_null=True)
 326
 327
 328 class DateTimeSerializer(serializers.Serializer):
 329     DateTime = serializers.Serializer(help_text="Date-time stamp.")
 330
 331
 332 class UpdateNsReqSerializer(serializers.Serializer):
 333     updateType = serializers.ChoiceField(help_text="The type of update.",
 334                                          choices=["ADD_VNF", "REMOVE_VNF", "INSTANTIATE_VNF", "CHANGE_VNF_DF",
 335                                                   "OPERATE_VNF", "MODIFY_VNF_INFORMATION",
 336                                                   "CHANGE_EXTERNAL_VNF_CONNECTIVITY", "REMOVE_SAP", "ADD_NESTED_NS",
 337                                                   "REMOVE_NESTED_NS", "ASSOC_NEW_NSD_VERSION", "MOVE_VNF", "ADD_VNFFG",
 338                                                   "REMOVE_VNFFG", "UPDATE_VNFFG", "CHANGE_NS_DF", "ADD_PNF",
 339                                                   "MODIFY_PNF", "REMOVE_PNF"], required=True)
 340     addVnfInstance = serializers.ListField(help_text="Identifies an existing VNF instance to be added to the NS "
 341                                                      "instance.",
 342                                            child=(VnfInstanceDataSerializer(help_text="Data of vnf instance",
 343                                                                             required=True)),
 344                                            required=False, allow_null=True)
 345     removeVnfInstanceId = serializers.ListField(help_text="Identifies an existing VNF instance to be removed from "
 346                                                           "the NS instance.", required=False, allow_null=True)
 347     instantiateVnfData = serializers.ListField(help_text="Identifies the new VNF to be instantiated.",
 348                                                child=(InstantiateVnfDataSerializer(help_text="Data of vnf instance",
 349                                                                                    required=True)),
 350                                                required=False, allow_null=True)
 351     changeVnfFlavourData = serializers.ListField(help_text="Identifies the new DF of the VNF instance to be "
 352                                                            "changed to.",
 353                                                  child=(ChangeVnfFlavourDataSerizlizer(
 354                                                      help_text="The type represents the information that is requested "
 355                                                                "to be changed deployment flavour for an existing "
 356                                                                "VNF instance.", required=True)),
 357                                                  required=False, allow_null=True)
 358     operateVnfData = serializers.ListField(help_text="This type represents a VNF instance for which the operational "
 359                                                      "state needs to be changed and the requested new state.",
 360                                            child=(OperateVnfDataSerializer(
 361                                                help_text="This type represents a VNF instance for which the operational"
 362                                                          " state needs to be changed and the requested new state",
 363                                                          required=True)), required=False, allow_null=True)
 364     modifyVnfInfoData = serializers.ListField(help_text="This type represents the information that is requested to be"
 365                                                         " modified for a VNF instance. ",
 366                                               child=(ModifyVnfInfoDataSerializer(
 367                                                   help_text="This type represents the information that is requested to "
 368                                                             "be modified for a VNF instance. ", required=True)),
 369                                               required=False, allow_null=True)
 370     changeExtVnfConnectivityData = serializers.ListField(help_text="Specifies the new external connectivity data of the"
 371                                                                    "VNF instance to be changed",
 372                                                          child=(ChangeExtVnfConnectivityDataSerializer(
 373                                                              help_text="This type describes the information invoked by"
 374                                                                        "the NFVO to change the external VNF "
 375                                                                        "connectivity information maintained by"
 376                                                                        " the VNFM.", required=True)),
 377                                                          required=False, allow_null=True)
 378     addSap = serializers.ListField(help_text="Identifies a new SAP to be added to the NS instance.",
 379                                    child=(SapDataSerializer(help_text="This type represents the information related to "
 380                                                                       "a SAP of a NS", required=True)),
 381                                    required=False, allow_null=True)
 382     removeSapId = serializers.ListField(help_text="The identifier an existing SAP to be removed from the "
 383                                                   "NS instance", required=False, allow_null=True)
 384     addNestedNsId = serializers.ListField(help_text="The identifier of an existing nested NS instance to be added to "
 385                                                     "the NS instance", required=False, allow_null=True)
 386     removeNestedNsId = serializers.ListField(help_text="The identifier of an existing nested NS instance to be "
 387                                                        "removed from the NS instance.",
 388                                              required=False, allow_null=True)
 389     assocNewNsdVersionData = AssocNewNsdVersionDataSerializer(help_text="Specify the new NSD to be used for the NS "
 390                                                                         "instance.", required=False, allow_null=True)
 391     moveVnfInstanceData = serializers.ListField(help_text="Specify existing VNF instance to be moved from one NS "
 392                                                           "instance to another NS instance",
 393                                                 child=(MoveVnfInstanceDataSerializer()),
 394                                                 required=False, allow_null=True)
 395     addVnffg = serializers.ListField(help_text="The identifier of an existing nested NS instance to be added to the"
 396                                                " NS instance.", required=False, allow_null=True)
 397     removeVnffgId = serializers.ListField(help_text="The identifier of an existing nested NS instance to be removed "
 398                                                     "from the NS instance", required=False, allow_null=True)
 399     updateVnffg = serializers.ListField(help_text="Specify the new VNFFG Information data to be updated for a VNFFG"
 400                                                   " of the NS Instance",
 401                                         child=(UpdateVnffgDataSerializer(help_text="This type specifies the parameters "
 402                                                                                    "used for the update of an existing "
 403                                                                                    "VNFFG instance.", required=True)),
 404                                         required=False, allow_null=True)
 405     changeNsFlavourData = ChangeNsFlavourDataSerializer(
 406         help_text="Specifies the new DF to be applied to the NS instance", required=False, allow_null=True)
 407     addPnfData = serializers.ListField(help_text="Specifies the PNF to be added into the NS instance.",
 408                                        child=(AddPnfDataSerializer(help_text="Serializer data of add pnf", required=True)),
 409                                        required=False, allow_null=True)
 410     modifyPnfData = serializers.ListField(help_text="Specifies the PNF to be modified in the NS instance.",
 411                                           child=(ModifyPnfDataSerializer(
 412                                               help_text="This type specifies an PNF to be modified in the NS instance.",
 413                                               required=True)),
 414                                           required=False, allow_null=True)
 415     removePnfId = serializers.ListField(help_text="Identifier of the PNF to be deleted from the NS instance.",
 416                                         required=False, allow_null=True)
 417     updateTime = DateTimeSerializer(help_text="Timestamp indicating the update time of the NS",
 418                                     required=False, allow_null=True)