zte/vmanager/driver/interfaces/views.py

   1 # Copyright 2016-2017 ZTE Corporation.
   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 import inspect
  16 import json
  17 import logging
  18 import os
  19 import traceback
  20
  21 from drf_yasg.utils import swagger_auto_schema
  22 from rest_framework import status
  23 from rest_framework.decorators import api_view
  24 from rest_framework.response import Response
  25 from rest_framework.views import APIView
  26
  27 from driver.interfaces.serializers import HealReqSerializer, InstScaleHealRespSerializer, ScaleReqSerializer, \
  28     NotifyReqSerializer
  29 from driver.pub.config.config import VNF_FTP
  30 from driver.pub.utils import restcall
  31 from driver.pub.utils.restcall import req_by_msb
  32
  33 logger = logging.getLogger(__name__)
  34
  35
  36 def load_json_file(file_name):
  37     json_file = os.path.join(os.path.dirname(__file__), "data/" + file_name)
  38     f = open(json_file)
  39     json_data = json.JSONDecoder().decode(f.read())
  40     f.close()
  41     return json_data
  42
  43
  44 def fun_name():
  45     return "=================%s==================" % inspect.stack()[1][3]
  46
  47
  48 def ignorcase_get(args, key):
  49     if not key:
  50         return ""
  51     if not args:
  52         return ""
  53     if key in args:
  54         return args[key]
  55     for old_key in args:
  56         if old_key.upper() == key.upper():
  57             return args[old_key]
  58     return ""
  59
  60
  61 def mapping_conv(keyword_map, rest_return):
  62     resp_data = {}
  63     for param in keyword_map:
  64         if keyword_map[param]:
  65             resp_data[keyword_map[param]] = ignorcase_get(rest_return, param)
  66     return resp_data
  67
  68
  69 # Query vnfm_info from nslcm
  70 def get_vnfminfo_from_nslcm(vnfmid):
  71     ret = req_by_msb("api/nslcm/v1/vnfms/%s" % vnfmid, "GET")
  72     return ret
  73
  74
  75 # Query vnfd_info from nslcm
  76 def vnfd_get(vnfpackageid):
  77     ret = req_by_msb("api/nslcm/v1/vnfpackage/%s" % vnfpackageid, "GET")
  78     return ret
  79
  80
  81 # Query vnfpackage_info from nslcm
  82 def vnfpackage_get(csarid):
  83     ret = req_by_msb("api/nslcm/v1/vnfpackage/%s" % csarid, "GET")
  84     return ret
  85
  86
  87 @api_view(http_method_names=['POST'])
  88 def instantiate_vnf(request, *args, **kwargs):
  89     try:
  90         logger.debug("[%s] request.data=%s", fun_name(), request.data)
  91         vnfm_id = ignorcase_get(kwargs, "vnfmid")
  92         ret = get_vnfminfo_from_nslcm(vnfm_id)
  93         if ret[0] != 0:
  94             return Response(data={'error': ret[1]}, status=ret[2])
  95         vnfm_info = json.JSONDecoder().decode(ret[1])
  96         logger.debug("[%s] vnfm_info=%s", fun_name(), vnfm_info)
  97         vnf_package_id = ignorcase_get(request.data, "vnfPackageId")
  98         ret = vnfd_get(vnf_package_id)
  99         if ret[0] != 0:
 100             return Response(data={'error': ret[1]}, status=ret[2])
 101         vnfd_info = json.JSONDecoder().decode(ret[1])
 102         logger.debug("[%s] vnfd_info=%s", fun_name(), vnfd_info)
 103         csar_id = ignorcase_get(vnfd_info, "csarId")
 104         ret = vnfpackage_get(csar_id)
 105         if ret[0] != 0:
 106             return Response(data={'error': ret[1]}, status=ret[2])
 107         vnf_package_info = json.JSONDecoder().decode(ret[1])
 108         packageInfo = ignorcase_get(vnf_package_info, "packageInfo")
 109         logger.debug("[%s] packageInfo=%s", fun_name(), packageInfo)
 110         data = {}
 111         data["NFVOID"] = 1
 112         data["VNFMID"] = vnfm_id
 113         vnfdModel = json.loads(ignorcase_get(packageInfo, "vnfdModel"))
 114         metadata = ignorcase_get(vnfdModel, "metadata")
 115         vnfd_name = ignorcase_get(metadata, "name")
 116         # TODO  convert sdc vnf package to vnf vender package
 117         inputs = []
 118         if "SPGW" in vnfd_name.upper():
 119             data["VNFD"] = VNF_FTP + "SPGW"
 120             inputs = load_json_file("SPGW" + "_inputs.json")
 121         elif "MME" in vnfd_name.upper():
 122             data["VNFD"] = VNF_FTP + "MME"
 123             inputs = load_json_file("MME" + "_inputs.json")
 124         else:
 125             data["VNFD"] = ignorcase_get(packageInfo, "downloadUri")
 126
 127         data["VNFURL"] = data["VNFD"]
 128
 129         data["extension"] = {}
 130         for name, value in ignorcase_get(ignorcase_get(request.data, "additionalParam"), "inputs").items():
 131             inputs.append({"name": name, "value": value})
 132
 133         data["extension"]["inputs"] = json.dumps(inputs)
 134         additionalParam = ignorcase_get(request.data, "additionalParam")
 135         data["extension"]["extVirtualLinks"] = ignorcase_get(additionalParam, "extVirtualLinks")
 136         data["extension"]["vnfinstancename"] = ignorcase_get(request.data, "vnfInstanceName")
 137         data["extension"]["vnfid"] = data["VNFD"]
 138         data["extension"]["multivim"] = 0
 139         logger.debug("[%s] call_req data=%s", fun_name(), data)
 140
 141         ret = restcall.call_req(
 142             base_url=ignorcase_get(vnfm_info, "url"),
 143             user=ignorcase_get(vnfm_info, "userName"),
 144             passwd=ignorcase_get(vnfm_info, "password"),
 145             auth_type=restcall.rest_no_auth,
 146             resource="v1/vnfs",
 147             method='post',
 148             content=json.JSONEncoder().encode(data))
 149
 150         logger.debug("[%s] call_req ret=%s", fun_name(), ret)
 151         if ret[0] != 0:
 152             return Response(data={'error': ret[1]}, status=ret[2])
 153         resp = json.JSONDecoder().decode(ret[1])
 154         resp_data = {
 155             "vnfInstanceId": ignorcase_get(resp, "VNFInstanceID"),
 156             "jobId": ignorcase_get(resp, "JobId")
 157         }
 158         logger.info("[%s]resp_data=%s", fun_name(), resp_data)
 159     except Exception as e:
 160         logger.error("Error occurred when instantiating VNF")
 161         raise e
 162     return Response(data=resp_data, status=ret[2])
 163
 164
 165 @api_view(http_method_names=['POST'])
 166 def terminate_vnf(request, *args, **kwargs):
 167     try:
 168         logger.debug("[%s] request.data=%s", fun_name(), request.data)
 169         vnfm_id = ignorcase_get(kwargs, "vnfmid")
 170         ret = get_vnfminfo_from_nslcm(vnfm_id)
 171         if ret[0] != 0:
 172             return Response(data={'error': ret[1]}, status=ret[2])
 173         vnfm_info = json.JSONDecoder().decode(ret[1])
 174         logger.debug("[%s] vnfm_info=%s", fun_name(), vnfm_info)
 175         ret = restcall.call_req(
 176             base_url=ignorcase_get(vnfm_info, "url"),
 177             user=ignorcase_get(vnfm_info, "userName"),
 178             passwd=ignorcase_get(vnfm_info, "password"),
 179             auth_type=restcall.rest_no_auth,
 180             resource="v1/vnfs/%s" % (ignorcase_get(kwargs, "vnfInstanceID")),
 181             method='delete',
 182             content=json.JSONEncoder().encode(request.data))
 183         if ret[0] != 0:
 184             return Response(data={'error': ret[1]}, status=ret[2])
 185         resp = json.JSONDecoder().decode(ret[1])
 186         resp_data = {
 187             "vnfInstanceId": ignorcase_get(resp, "VNFInstanceID"),
 188             "jobId": ignorcase_get(resp, "JobId")
 189         }
 190         logger.debug("[%s]resp_data=%s", fun_name(), resp_data)
 191     except Exception as e:
 192         logger.error("Error occurred when terminating VNF")
 193         raise e
 194     return Response(data=resp_data, status=ret[2])
 195
 196
 197 @api_view(http_method_names=['GET'])
 198 def query_vnf(request, *args, **kwargs):
 199     try:
 200         logger.debug("[%s] request.data=%s", fun_name(), request.data)
 201         vnfm_id = ignorcase_get(kwargs, "vnfmid")
 202         ret = get_vnfminfo_from_nslcm(vnfm_id)
 203         if ret[0] != 0:
 204             return Response(data={'error': ret[1]}, status=ret[2])
 205         vnfm_info = json.JSONDecoder().decode(ret[1])
 206         logger.debug("[%s] vnfm_info=%s", fun_name(), vnfm_info)
 207         ret = restcall.call_req(
 208             base_url=ignorcase_get(vnfm_info, "url"),
 209             user=ignorcase_get(vnfm_info, "userName"),
 210             passwd=ignorcase_get(vnfm_info, "password"),
 211             auth_type=restcall.rest_no_auth,
 212             resource="v1/vnfs/%s" % (ignorcase_get(kwargs, "vnfInstanceID")),
 213             method='get',
 214             content=json.JSONEncoder().encode({}))
 215         if ret[0] != 0:
 216             return Response(data={'error': ret[1]}, status=ret[2])
 217         resp = json.JSONDecoder().decode(ret[1])
 218         vnf_status = ignorcase_get(resp, "vnfinstancestatus")
 219         resp_data = {"vnfInfo": {"vnfStatus": vnf_status}}
 220         logger.debug("[%s]resp_data=%s", fun_name(), resp_data)
 221     except Exception as e:
 222         logger.error("Error occurred when querying VNF information.")
 223         raise e
 224     return Response(data=resp_data, status=ret[2])
 225
 226
 227 @api_view(http_method_names=['GET'])
 228 def operation_status(request, *args, **kwargs):
 229     data = {}
 230     try:
 231         logger.debug("[%s] request.data=%s", fun_name(), request.data)
 232         vnfm_id = ignorcase_get(kwargs, "vnfmid")
 233         ret = get_vnfminfo_from_nslcm(vnfm_id)
 234         if ret[0] != 0:
 235             return Response(data={'error': ret[1]}, status=ret[2])
 236         vnfm_info = json.JSONDecoder().decode(ret[1])
 237         logger.debug("[%s] vnfm_info=%s", fun_name(), vnfm_info)
 238         operation_status_url = '/v1/jobs/{jobId}?NFVOID={nfvoId}&VNFMID={vnfmId}&ResponseID={responseId}'
 239         ret = restcall.call_req(
 240             base_url=ignorcase_get(vnfm_info, 'url'),
 241             user=ignorcase_get(vnfm_info, 'userName'),
 242             passwd=ignorcase_get(vnfm_info, 'password'),
 243             auth_type=restcall.rest_no_auth,
 244             resource=operation_status_url.format(jobId=ignorcase_get(kwargs, 'jobid'), nfvoId=1,
 245                                                  vnfmId=ignorcase_get(kwargs, 'vnfmid'),
 246                                                  responseId=ignorcase_get(request.GET, 'responseId')),
 247             method='get',
 248             content=json.JSONEncoder().encode(data))
 249
 250         if ret[0] != 0:
 251             return Response(data={'error': ret[1]}, status=ret[2])
 252         resp_data = json.JSONDecoder().decode(ret[1])
 253         logger.info("[%s]resp_data=%s", fun_name(), resp_data)
 254     except Exception as e:
 255         logger.error("Error occurred when getting operation status information.")
 256         raise e
 257     return Response(data=resp_data, status=ret[2])
 258
 259
 260 @api_view(http_method_names=['PUT'])
 261 def grantvnf(request, *args, **kwargs):
 262     logger.info("=====grantvnf=====")
 263     try:
 264         logger.info("req_data = %s", request.data)
 265         grant_vnf_param_map = {
 266             "VNFMID": "",
 267             "NFVOID": "",
 268             "VIMID": "",
 269             "ExVIMIDList": "",
 270             "ExVIMID": "",
 271             "Tenant": "",
 272             "VNFInstanceID": "vnfInstanceId",
 273             "OperationRight": "",
 274             "VMList": "",
 275             "VMFlavor": "",
 276             "VMNumber": ""
 277         }
 278         data = mapping_conv(grant_vnf_param_map, request.data)
 279         data["vnfDescriptorId"] = ""
 280         if ignorcase_get(request.data, "operationright") == 0:
 281             data["lifecycleOperation"] = "Instantiate"
 282             data["addresource"] = []
 283             for vm in ignorcase_get(request.data, "vmlist"):
 284                 for i in range(int(ignorcase_get(vm, "vmnumber"))):
 285                     data["addresource"].append(
 286                         {
 287                             "type": "vdu",
 288                             "resourceDefinitionId": i,
 289                             "vdu": ignorcase_get(vm, "vmflavor"),
 290                             "vimid": ignorcase_get(vm, "vimid"),
 291                             "tenant": ignorcase_get(vm, "tenant")})
 292
 293         data["additionalparam"] = {}
 294         data["additionalparam"]["vnfmid"] = ignorcase_get(request.data, "vnfmid")
 295         data["additionalparam"]["vimid"] = ignorcase_get(request.data, "vimid")
 296         data["additionalparam"]["tenant"] = ignorcase_get(request.data, "tenant")
 297
 298         ret = req_by_msb('api/nslcm/v1/ns/grantvnf', "POST", content=json.JSONEncoder().encode(data))
 299         logger.info("ret = %s", ret)
 300         if ret[0] != 0:
 301             return Response(data={'error': ret[1]}, status=ret[2])
 302         resp = json.JSONDecoder().decode(ret[1])
 303         resp_data = {
 304             'vimid': ignorcase_get(resp['vim'], 'vimid'),
 305             'tenant': ignorcase_get(ignorcase_get(resp['vim'], 'accessinfo'), 'tenant')
 306         }
 307         logger.info("[%s]resp_data=%s", fun_name(), resp_data)
 308     except Exception as e:
 309         logger.error("Error occurred in Grant VNF.")
 310         raise e
 311     return Response(data=resp_data, status=ret[2])
 312
 313
 314 class Notify(APIView):
 315     @swagger_auto_schema(
 316         request_body=NotifyReqSerializer()
 317     )
 318     def post(self, request):
 319         try:
 320             logger.info("[%s]req_data = %s", fun_name(), request.data)
 321             notify_param_map = {
 322                 "NFVOID": "",
 323                 "VNFMID": "VNFMID",
 324                 "VIMID": "vimid",
 325                 "VNFInstanceID": "vnfInstanceId",
 326                 "TimeStamp": "",
 327                 "EventType": "operation",
 328                 "VMList": "",
 329                 "VMFlavor": "",
 330                 "VMNumber": "",
 331                 "VMIDlist": "",
 332                 "VMUUID": ""
 333             }
 334             data = mapping_conv(notify_param_map, request.data)
 335             logger.info("[%s]data = %s", fun_name(), data)
 336
 337             data["status"] = "result"
 338             data["jobId"] = "notMust"
 339             data["affectedVnfc"] = []
 340             data["affectedVl"] = []
 341             data["affectedVirtualStorage"] = []
 342             data["affectedCp"] = []
 343
 344             extension = ignorcase_get(request.data, "extension")
 345             openo_notification = ignorcase_get(extension, "openo_notification")
 346             if openo_notification:
 347                 affectedvnfcs = ignorcase_get(openo_notification, "affectedVnfc")
 348                 affectedvls = ignorcase_get(openo_notification, "affectedvirtuallink")
 349                 affectedcps = ignorcase_get(openo_notification, "affectedCp")
 350                 vnfdmodule = ignorcase_get(openo_notification, "vnfdmodule")
 351             else:
 352                 affectedvnfcs = ignorcase_get(ignorcase_get(request.data, "extension"), "affectedvnfc")
 353                 affectedvls = ignorcase_get(ignorcase_get(request.data, "extension"), "affectedvl")
 354                 affectedcps = ignorcase_get(ignorcase_get(request.data, "extension"), "affectedcp")
 355                 vnfdmodule = ignorcase_get(ignorcase_get(request.data, "extension"), "vnfdmodule")
 356
 357             data["vnfdmodule"] = vnfdmodule
 358
 359             for affectedvnfc in affectedvnfcs:
 360                 data["affectedVnfc"].append({
 361                     "vnfcInstanceId": ignorcase_get(affectedvnfc, "vnfcInstanceId"),
 362                     "vduId": ignorcase_get(affectedvnfc, "vduId"),
 363                     "changeType": ignorcase_get(affectedvnfc, "changeType"),
 364                     "vimId": ignorcase_get(ignorcase_get(affectedvnfc, "computeResource"), "vimId"),
 365                     "vmId": ignorcase_get(ignorcase_get(affectedvnfc, "computeResource"), "resourceId"),
 366                     "vmName": ignorcase_get(ignorcase_get(affectedvnfc, "computeResource"), "resourceName")
 367                 })
 368
 369             for affectedvl in affectedvls:
 370                 data["affectedVl"].append({
 371                     "vlInstanceId": ignorcase_get(affectedvl, "virtualLinkInstanceId"),
 372                     "changeType": ignorcase_get(affectedvl, "changeType"),
 373                     "vimId": ignorcase_get(ignorcase_get(affectedvl, "networkResource"), "vimId"),
 374                     "vldId": ignorcase_get(affectedvl, "virtuallinkdescid"),
 375                     "networkResource": {
 376                         "resourceType": "network",
 377                         "resourceId": ignorcase_get(ignorcase_get(affectedvl, "networkresource"), "resourceid"),
 378                         "resourceName": ignorcase_get(ignorcase_get(affectedvl, "networkresource"), "resourcename")
 379                     }
 380                 })
 381
 382             for affectedcp in affectedcps:
 383                 data["affectedCp"].append(affectedcp)
 384
 385             notify_url = 'api/nslcm/v1/ns/{vnfmid}/vnfs/{vnfInstanceId}/Notify'
 386             ret = req_by_msb(notify_url.format(vnfmid=ignorcase_get(data, 'VNFMID'),
 387                                                vnfInstanceId=ignorcase_get(data, 'vnfinstanceid')),
 388                              "POST", content=json.JSONEncoder().encode(data))
 389
 390             logger.info("[%s]data = %s", fun_name(), ret)
 391             if ret[0] != 0:
 392                 return Response(data={'error': ret[1]}, status=ret[2])
 393             return Response(data=None, status=ret[2])
 394         except Exception as e:
 395             logger.error("Error occurred in LCM notification.")
 396             logger.error(traceback.format_exc())
 397             raise e
 398
 399
 400 class Scale(APIView):
 401     @swagger_auto_schema(
 402         request_body=ScaleReqSerializer(),
 403         responses={
 404             status.HTTP_202_ACCEPTED: InstScaleHealRespSerializer(),
 405             status.HTTP_500_INTERNAL_SERVER_ERROR: "Internal error"
 406         }
 407     )
 408     def post(self, request, vnfmid, vnfInstanceId):
 409         logger.info("====scale_vnf===")
 410         try:
 411             logger.info("request.data = %s", request.data)
 412             logger.info("requested_url = %s", request.get_full_path())
 413             scaleReqSerializer = ScaleReqSerializer(data=request.data)
 414             if not scaleReqSerializer.is_valid():
 415                 raise Exception(scaleReqSerializer.errors)
 416
 417             ret = get_vnfminfo_from_nslcm(vnfmid)
 418             if ret[0] != 0:
 419                 raise Exception(ret[1])
 420
 421             vnfm_info = json.JSONDecoder().decode(ret[1])
 422             scale_type = ignorcase_get(scaleReqSerializer.data, "type")
 423             aspect_id = ignorcase_get(scaleReqSerializer.data, "aspectId")
 424             number_of_steps = ignorcase_get(scaleReqSerializer.data, "numberOfSteps")
 425             data = {
 426                 'vnfmid': vnfmid,
 427                 'nfvoid': 1,
 428                 'scaletype': '0' if scale_type == 'SCALE_OUT' else '1',
 429                 'vmlist': [{'VMNumber': number_of_steps, 'VMFlavor': aspect_id}],
 430                 'extension': ''
 431             }
 432
 433             logger.info("data = %s", data)
 434             ret = restcall.call_req(
 435                 base_url=ignorcase_get(vnfm_info, "url"),
 436                 user=ignorcase_get(vnfm_info, "userName"),
 437                 passwd=ignorcase_get(vnfm_info, "password"),
 438                 auth_type=restcall.rest_no_auth,
 439                 resource='/v1/vnfs/{vnfInstanceID}/scale'.format(vnfInstanceID=vnfInstanceId),
 440                 method='put',  # POST
 441                 content=json.JSONEncoder().encode(data))
 442             logger.info("ret=%s", ret)
 443             if ret[0] != 0:
 444                 raise Exception('scale error')
 445
 446             resp_data = json.JSONDecoder().decode(ret[1])
 447             logger.info("resp_data=%s", resp_data)
 448             scaleRespSerializer = InstScaleHealRespSerializer(data=resp_data)
 449             if not scaleRespSerializer.is_valid():
 450                 raise Exception(scaleRespSerializer.errors)
 451
 452             return Response(data=scaleRespSerializer.data, status=status.HTTP_202_ACCEPTED)
 453         except Exception as e:
 454             logger.error("Error occurred when scaling VNF,error:%s", e.message)
 455             logger.error(traceback.format_exc())
 456             return Response(data={'error': 'scale expection'}, status=status.HTTP_500_INTERNAL_SERVER_ERROR)
 457
 458
 459 class Heal(APIView):
 460     @swagger_auto_schema(
 461         request_body=HealReqSerializer(),
 462         responses={
 463             status.HTTP_202_ACCEPTED: InstScaleHealRespSerializer(),
 464             status.HTTP_500_INTERNAL_SERVER_ERROR: "Internal error"
 465         }
 466     )
 467     def post(self, request, vnfmid, vnfInstanceId):
 468         logger.info("====heal_vnf===")
 469         try:
 470             logger.info("request.data = %s", request.data)
 471             logger.info("requested_url = %s", request.get_full_path())
 472             healReqSerializer = HealReqSerializer(data=request.data)
 473             if not healReqSerializer.is_valid():
 474                 raise Exception(healReqSerializer.errors)
 475
 476             ret = get_vnfminfo_from_nslcm(vnfmid)
 477             if ret[0] != 0:
 478                 raise Exception(ret[1])
 479
 480             vnfm_info = json.JSONDecoder().decode(ret[1])
 481             data = {}
 482             data['action'] = ignorcase_get(healReqSerializer.data, 'action')
 483             affectedvm = ignorcase_get(healReqSerializer.data, 'affectedvm')
 484             data['affectedvm'] = []
 485             if isinstance(affectedvm, list):
 486                 data['affectedvm'] = affectedvm
 487             else:
 488                 data['affectedvm'].append(affectedvm)
 489             data['lifecycleoperation'] = 'operate'
 490             data['isgrace'] = 'force'
 491
 492             logger.info("data = %s", data)
 493             ret = restcall.call_req(
 494                 base_url=ignorcase_get(vnfm_info, "url"),
 495                 user=ignorcase_get(vnfm_info, "userName"),
 496                 passwd=ignorcase_get(vnfm_info, "password"),
 497                 auth_type=restcall.rest_no_auth,
 498                 resource='/api/v1/nf_m_i/nfs/{vnfInstanceID}/vms/operation'.format(vnfInstanceID=vnfInstanceId),
 499                 method='post',
 500                 content=json.JSONEncoder().encode(data))
 501             logger.info("ret=%s", ret)
 502             if ret[0] != 0:
 503                 raise Exception('heal error')
 504             resp_data = json.JSONDecoder().decode(ret[1])
 505             logger.info("resp_data=%s", resp_data)
 506             healRespSerializer = InstScaleHealRespSerializer(data=resp_data)
 507             if not healRespSerializer.is_valid():
 508                 raise Exception(healRespSerializer.errors)
 509
 510             return Response(data=healRespSerializer.data, status=status.HTTP_202_ACCEPTED)
 511         except Exception as e:
 512             logger.error("Error occurred when healing VNF,error:%s", e.message)
 513             logger.error(traceback.format_exc())
 514             return Response(data={'error': 'heal expection'}, status=status.HTTP_500_INTERNAL_SERVER_ERROR)
 515
 516
 517 def get_vdus(nf_model, aspect_id):
 518     associated_group = ''
 519     members = []
 520     vnf_flavours = nf_model['vnf_flavours']
 521     for vnf_flaour in vnf_flavours:
 522         scaling_aspects = vnf_flaour['scaling_aspects']
 523         for aspect in scaling_aspects:
 524             if aspect_id == aspect['id']:
 525                 associated_group = aspect['associated_group']
 526                 break
 527     if not associated_group:
 528         logger.error('Cannot find the corresponding element group')
 529         raise Exception('Cannot find the corresponding element group')
 530     for element_group in nf_model['element_groups']:
 531         if element_group['group_id'] == associated_group:
 532             members = element_group['members']
 533     if not members:
 534         logger.error('Cannot find the corresponding members')
 535         raise Exception('Cannot find the corresponding members')
 536     return members
 537
 538
 539 @api_view(http_method_names=['GET'])
 540 def samples(request, *args, **kwargs):
 541     return Response(data={"status": "ok"})