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 traceback
  19
  20 from rest_framework.decorators import api_view
  21 from rest_framework.response import Response
  22
  23 from driver.pub.utils import restcall
  24 from driver.pub.utils.restcall import req_by_msb
  25
  26 logger = logging.getLogger(__name__)
  27
  28
  29 def fun_name():
  30     return "=================%s==================" % inspect.stack()[1][3]
  31
  32
  33 def ignorcase_get(args, key):
  34     if not key:
  35         return ""
  36     if not args:
  37         return ""
  38     if key in args:
  39         return args[key]
  40     for old_key in args:
  41         if old_key.upper() == key.upper():
  42             return args[old_key]
  43     return ""
  44
  45
  46 def mapping_conv(keyword_map, rest_return):
  47     resp_data = {}
  48     for param in keyword_map:
  49         if keyword_map[param]:
  50             resp_data[keyword_map[param]] = ignorcase_get(rest_return, param)
  51     return resp_data
  52
  53
  54 query_vnfd_url = "api/nslcm/v1/vnfpackage/%s"
  55 query_vnfm_url = "api/extsys/v1/vnfms/%s"
  56 query_package_url = "api/nslcm/v1/vnfpackage/%s"
  57
  58
  59 # Query VNFM by VNFMID
  60 def vnfm_get(vnfmid):
  61     ret = req_by_msb("api/extsys/v1/vnfms/%s" % vnfmid, "GET")
  62     return ret
  63
  64
  65 def vnfd_get(vnfpackageid):
  66     ret = req_by_msb("api/nslcm/v1/vnfpackage/%s" % vnfpackageid, "GET")
  67     return ret
  68
  69
  70 def vnfpackage_get(csarid):
  71     ret = req_by_msb("api/nslcm/v1/vnfpackage/%s" % csarid, "GET")
  72     return ret
  73
  74
  75 # ==================================================
  76 create_vnf_url = "v1/vnfs"
  77 create_vnf_param_mapping = {
  78     "packageUrl": "",
  79     "instantiateUrl": "",
  80     "instantiationLevel": "",
  81     "vnfInstanceName": "",
  82     "vnfPackageId": "",
  83     "vnfDescriptorId": "",
  84     "flavorId": "",
  85     "vnfInstanceDescription": "",
  86     "extVirtualLink": "",
  87     "additionalParam": ""}
  88 create_vnf_resp_mapping = {
  89     "VNFInstanceID": "vnfInstanceId",
  90     "JobId": "jobid",}
  91
  92
  93 @api_view(http_method_names=['POST'])
  94 def instantiate_vnf(request, *args, **kwargs):
  95     try:
  96         logger.debug("[%s] request.data=%s", fun_name(), request.data)
  97         vnfm_id = ignorcase_get(kwargs, "vnfmid")
  98         ret = vnfm_get(vnfm_id)
  99         if ret[0] != 0:
 100             return Response(data={'error': ret[1]}, status=ret[2])
 101         vnfm_info = json.JSONDecoder().decode(ret[1])
 102         logger.debug("[%s] vnfm_info=%s", fun_name(), vnfm_info)
 103         vnf_package_id = ignorcase_get(request.data, "vnfPackageId")
 104         ret = vnfd_get(vnf_package_id)
 105         if ret[0] != 0:
 106             return Response(data={'error': ret[1]}, status=ret[2])
 107         vnfd_info = json.JSONDecoder().decode(ret[1])
 108         logger.debug("[%s] vnfd_info=%s", fun_name(), vnfd_info)
 109         csar_id = ignorcase_get(vnfd_info, "csarId")
 110         ret = vnfpackage_get(csar_id)
 111         if ret[0] != 0:
 112             return Response(data={'error': ret[1]}, status=ret[2])
 113         vnf_package_info = json.JSONDecoder().decode(ret[1])
 114         packageInfo = ignorcase_get(vnf_package_info, "packageInfo")
 115         logger.debug("[%s] packageInfo=%s", fun_name(), packageInfo)
 116         data = {}
 117         data["NFVOID"] = 1
 118         data["VNFMID"] = vnfm_id
 119         vnfdId = ignorcase_get(packageInfo, "vnfdId")
 120         from urlparse import urlparse
 121         vnfm_ip = urlparse(ignorcase_get(vnfm_info, "url")).netloc.split(':')[0]
 122         VNFS = ["SPGW", "MME"]
 123         if vnfdId in VNFS:
 124             data["VNFD"] = "ftp://VMVERSION:vmversion@" + vnfm_ip + ":21/" + vnfdId
 125             data["VNFURL"] = "ftp://VMVERSION:vmversion@" + vnfm_ip + ":21/" + vnfdId
 126         else:
 127             data["VNFD"] = ignorcase_get(packageInfo, "downloadUri")
 128             data["VNFURL"] = ignorcase_get(packageInfo, "downloadUri")
 129
 130         data["extension"] = {}
 131         inputs = []
 132         for name, value in ignorcase_get(ignorcase_get(request.data, "additionalParam"), "inputs").items():
 133             inputs.append({"name": name, "value": value})
 134
 135         logger.info(
 136             "ignorcase_get(request.data, \"additionalParam\") = %s" % ignorcase_get(request.data, "additionalParam"))
 137         data["extension"]["inputs"] = json.dumps(inputs)
 138         data["extension"]["extVirtualLinks"] = ignorcase_get(
 139             ignorcase_get(request.data, "additionalParam"), "extVirtualLinks")
 140         data["extension"]["vnfinstancename"] = ignorcase_get(request.data, "vnfInstanceName")
 141         data["extension"]["vnfid"] = data["VNFD"]
 142         data["extension"]["multivim"] = 0
 143         logger.debug("[%s] call_req data=%s", fun_name(), data)
 144         ret = restcall.call_req(
 145             base_url=ignorcase_get(vnfm_info, "url"),
 146             user=ignorcase_get(vnfm_info, "userName"),
 147             passwd=ignorcase_get(vnfm_info, "password"),
 148             auth_type=restcall.rest_no_auth,
 149             resource=create_vnf_url,
 150             method='post',
 151             content=json.JSONEncoder().encode(data))
 152         logger.debug("[%s] call_req ret=%s", fun_name(), ret)
 153         if ret[0] != 0:
 154             return Response(data={'error': ret[1]}, status=ret[2])
 155         resp = json.JSONDecoder().decode(ret[1])
 156         resp_data = mapping_conv(create_vnf_resp_mapping, resp)
 157         logger.info("[%s]resp_data=%s", fun_name(), resp_data)
 158     except Exception as e:
 159         logger.error("Error occurred when instantiating VNF")
 160         raise e
 161     return Response(data=resp_data, status=ret[2])
 162
 163
 164 # ==================================================
 165 vnf_delete_url = "v1/vnfs/%s"
 166 vnf_delete_param_mapping = {
 167     "terminationType": "terminationType",
 168     "gracefulTerminationTimeout": "gracefulTerminationTimeout"}
 169 vnf_delete_resp_mapping = {
 170     "vnfInstanceId": "vnfInstanceId",
 171     "JobId": "jobid"}
 172
 173
 174 @api_view(http_method_names=['POST'])
 175 def terminate_vnf(request, *args, **kwargs):
 176     try:
 177         logger.debug("[%s] request.data=%s", fun_name(), request.data)
 178         vnfm_id = ignorcase_get(kwargs, "vnfmid")
 179         ret = vnfm_get(vnfm_id)
 180         if ret[0] != 0:
 181             return Response(data={'error': ret[1]}, status=ret[2])
 182         vnfm_info = json.JSONDecoder().decode(ret[1])
 183         logger.debug("[%s] vnfm_info=%s", fun_name(), vnfm_info)
 184         data = {}
 185         logger.debug("[%s]req_data=%s", fun_name(), data)
 186         ret = restcall.call_req(
 187             base_url=ignorcase_get(vnfm_info, "url"),
 188             user=ignorcase_get(vnfm_info, "userName"),
 189             passwd=ignorcase_get(vnfm_info, "password"),
 190             auth_type=restcall.rest_no_auth,
 191             resource=vnf_delete_url % (ignorcase_get(kwargs, "vnfInstanceID")),
 192             method='delete',
 193             content=json.JSONEncoder().encode(data))
 194         if ret[0] != 0:
 195             return Response(data={'error': ret[1]}, status=ret[2])
 196         resp = json.JSONDecoder().decode(ret[1])
 197         resp_data = mapping_conv(vnf_delete_resp_mapping, resp)
 198         logger.debug("[%s]resp_data=%s", fun_name(), resp_data)
 199     except Exception as e:
 200         logger.error("Error occurred when terminating VNF")
 201         raise e
 202     return Response(data=resp_data, status=ret[2])
 203
 204
 205 # ==================================================
 206
 207
 208 vnf_detail_url = "v1/vnfs/%s"
 209 vnf_detail_resp_mapping = {
 210     "VNFInstanseStatus": "status",}
 211
 212
 213 @api_view(http_method_names=['GET'])
 214 def query_vnf(request, *args, **kwargs):
 215     try:
 216         logger.debug("[%s] request.data=%s", fun_name(), request.data)
 217         vnfm_id = ignorcase_get(kwargs, "vnfmid")
 218         ret = vnfm_get(vnfm_id)
 219         if ret[0] != 0:
 220             return Response(data={'error': ret[1]}, status=ret[2])
 221         vnfm_info = json.JSONDecoder().decode(ret[1])
 222         logger.debug("[%s] vnfm_info=%s", fun_name(), vnfm_info)
 223         data = {}
 224         ret = restcall.call_req(
 225             base_url=ignorcase_get(vnfm_info, "url"),
 226             user=ignorcase_get(vnfm_info, "userName"),
 227             passwd=ignorcase_get(vnfm_info, "password"),
 228             auth_type=restcall.rest_no_auth,
 229             resource=vnf_detail_url % (ignorcase_get(kwargs, "vnfInstanceID")),
 230             method='get',
 231             content=json.JSONEncoder().encode(data))
 232         if ret[0] != 0:
 233             return Response(data={'error': ret[1]}, status=ret[2])
 234         resp = json.JSONDecoder().decode(ret[1])
 235         vnf_status = ignorcase_get(resp, "vnfinstancestatus")
 236         resp_data = {"vnfInfo": {"vnfStatus": vnf_status}}
 237         logger.debug("[%s]resp_data=%s", fun_name(), resp_data)
 238     except Exception as e:
 239         logger.error("Error occurred when querying VNF information.")
 240         raise e
 241     return Response(data=resp_data, status=ret[2])
 242
 243
 244 # Get Operation Status
 245 operation_status_url = '/v1/jobs/{jobId}?NFVOID={nfvoId}&VNFMID={vnfmId}&ResponseID={responseId}'
 246 operation_status_resp_map = {
 247     "JobId": "jobId",
 248     "Status": "status",
 249     "Progress": "progress",
 250     "StatusDescription": "currentStep",
 251     "ErrorCode": "errorCode",
 252     "ResponseId": "responseId",
 253     "ResponseHistoryList": "responseHistoryList",
 254     "ResponseDescriptor": "responseDescriptor",}
 255
 256
 257 @api_view(http_method_names=['GET'])
 258 def operation_status(request, *args, **kwargs):
 259     data = {}
 260     try:
 261         logger.debug("[%s] request.data=%s", fun_name(), request.data)
 262         vnfm_id = ignorcase_get(kwargs, "vnfmid")
 263         ret = vnfm_get(vnfm_id)
 264         if ret[0] != 0:
 265             return Response(data={'error': ret[1]}, status=ret[2])
 266         vnfm_info = json.JSONDecoder().decode(ret[1])
 267         logger.debug("[%s] vnfm_info=%s", fun_name(), vnfm_info)
 268         ret = restcall.call_req(
 269             base_url=ignorcase_get(vnfm_info, 'url'),
 270             user=ignorcase_get(vnfm_info, 'userName'),
 271             passwd=ignorcase_get(vnfm_info, 'password'),
 272             auth_type=restcall.rest_no_auth,
 273             resource=operation_status_url.format(jobId=ignorcase_get(kwargs, 'jobid'), nfvoId=1,
 274                                                  vnfmId=ignorcase_get(kwargs, 'vnfmid'),
 275                                                  responseId=ignorcase_get(request.GET, 'responseId')),
 276             method='get',
 277             content=json.JSONEncoder().encode(data))
 278
 279         if ret[0] != 0:
 280             return Response(data={'error': ret[1]}, status=ret[2])
 281         resp_data = json.JSONDecoder().decode(ret[1])
 282         logger.info("[%s]resp_data=%s", fun_name(), resp_data)
 283     except Exception as e:
 284         logger.error("Error occurred when getting operation status information.")
 285         raise e
 286     return Response(data=resp_data, status=ret[2])
 287
 288
 289 # Grant VNF Lifecycle Operation
 290 grant_vnf_url = 'api/nslcm/v1/ns/grantvnf'
 291 grant_vnf_param_map = {
 292     "VNFMID": "",
 293     "NFVOID": "",
 294     "VIMID": "",
 295     "ExVIMIDList": "",
 296     "ExVIMID": "",
 297     "Tenant": "",
 298     "VNFInstanceID": "vnfInstanceId",
 299     "OperationRight": "",
 300     "VMList": "",
 301     "VMFlavor": "",
 302     "VMNumber": ""}
 303
 304
 305 @api_view(http_method_names=['PUT'])
 306 def grantvnf(request, *args, **kwargs):
 307     logger.info("=====grantvnf=====")
 308     try:
 309         resp_data = {}
 310         logger.info("req_data = %s", request.data)
 311         data = mapping_conv(grant_vnf_param_map, request.data)
 312         logger.info("grant_vnf_url = %s", grant_vnf_url)
 313         data["vnfDescriptorId"] = ""
 314         if ignorcase_get(request.data, "operationright") == 0:
 315             data["lifecycleOperation"] = "Instantiate"
 316             data["addresource"] = []
 317             for vm in ignorcase_get(request.data, "vmlist"):
 318                 for i in range(int(ignorcase_get(vm, "vmnumber"))):
 319                     data["addresource"].append(
 320                         {"type": "vdu",
 321                          "resourceDefinitionId": i,
 322                          "vdu": ignorcase_get(vm, "vmflavor"),
 323                          "vimid": ignorcase_get(vm, "vimid"),
 324                          "tenant": ignorcase_get(vm, "tenant")
 325                          })
 326
 327         data["additionalparam"] = {}
 328         data["additionalparam"]["vnfmid"] = ignorcase_get(request.data, "vnfmid")
 329         data["additionalparam"]["vimid"] = ignorcase_get(request.data, "vimid")
 330         data["additionalparam"]["tenant"] = ignorcase_get(request.data, "tenant")
 331
 332         logger.info("data = %s", data)
 333         ret = req_by_msb(grant_vnf_url, "POST", content=json.JSONEncoder().encode(data))
 334         logger.info("ret = %s", ret)
 335         if ret[0] != 0:
 336             return Response(data={'error': ret[1]}, status=ret[2])
 337         resp = json.JSONDecoder().decode(ret[1])
 338
 339         resp_data['vimid'] = ignorcase_get(resp['vim'], 'vimid')
 340         resp_data['tenant'] = ignorcase_get(ignorcase_get(resp['vim'], 'accessinfo'), 'tenant')
 341
 342         logger.info("[%s]resp_data=%s", fun_name(), resp_data)
 343     except Exception as e:
 344         logger.error("Error occurred in Grant VNF.")
 345         raise e
 346     return Response(data=resp_data, status=ret[2])
 347
 348
 349 # Notify LCM Events
 350 notify_url = 'api/nslcm/v1/ns/{vnfmid}/vnfs/{vnfInstanceId}/Notify'
 351 notify_param_map = {
 352     "NFVOID": "",
 353     "VNFMID": "VNFMID",
 354     "VIMID": "vimid",
 355     "VNFInstanceID": "vnfInstanceId",
 356     "TimeStamp": "",
 357     "EventType": "operation",
 358     "VMList": "",
 359     "VMFlavor": "",
 360     "VMNumber": "",
 361     "VMIDlist": "",
 362     "VMUUID": "",}
 363
 364
 365 @api_view(http_method_names=['POST'])
 366 def notify(request, *args, **kwargs):
 367     try:
 368         logger.info("[%s]req_data = %s", fun_name(), request.data)
 369         data = mapping_conv(notify_param_map, request.data)
 370         logger.info("[%s]data = %s", fun_name(), data)
 371
 372         data["status"] = "result"
 373         data["jobId"] = "notMust"
 374         data["affectedVnfc"] = []
 375         data["affectedVl"] = []
 376         data["affectedVirtualStorage"] = []
 377         data["affectedCp"] = []
 378
 379         affectedvnfcs = ignorcase_get(ignorcase_get(request.data, "extension"), "affectedvnfc")
 380         affectedvls = ignorcase_get(ignorcase_get(request.data, "extension"), "affectedvl")
 381         affectedcps = ignorcase_get(ignorcase_get(request.data, "extension"), "affectedcp")
 382         vnfdmodule = ignorcase_get(ignorcase_get(request.data, "extension"), "vnfdmodule")
 383
 384         data["vnfdmodule"] = vnfdmodule
 385
 386         for affectedvnfc in affectedvnfcs:
 387             data["affectedVnfc"].append({
 388                 "vnfcInstanceId": ignorcase_get(affectedvnfc, "vnfcinstanceid"),
 389                 "vduId": ignorcase_get(affectedvnfc, "vduId"),
 390                 "changeType": ignorcase_get(affectedvnfc, "changeType"),
 391                 "vimid": ignorcase_get(ignorcase_get(affectedvnfc, "computeresource"), "vimid"),
 392                 "vmId": ignorcase_get(ignorcase_get(affectedvnfc, "computeresource"), "resourceid"),
 393                 "vmName": ignorcase_get(ignorcase_get(affectedvnfc, "computeresource"), "resourcename")
 394             })
 395
 396         for affectedvl in affectedvls:
 397             data["affectedVl"].append({
 398                 "vlInstanceId": ignorcase_get(affectedvl, "virtuallinkinstanceid"),
 399                 "vimid": ignorcase_get(ignorcase_get(affectedvl, "networkresource"), "vimid"),
 400                 "vldid": ignorcase_get(affectedvl, "virtuallinkdescid"),
 401                 "vllid": ignorcase_get(ignorcase_get(affectedvl, "networkresource"), "resourceid"),
 402                 "vlName": ignorcase_get(ignorcase_get(affectedvl, "networkresource"), "resourcename")
 403             })
 404
 405         for affectedcp in affectedcps:
 406             data["affectedCp"].append(affectedcp)
 407             #     {
 408             #     "virtualLinkInstanceId": ignorcase_get(affectedcp, "virtuallinkinstanceid"),
 409             #     "ownerId": ignorcase_get(affectedcp, "ownerId"),
 410             #     "ownerType": ignorcase_get(affectedcp, "ownerType")
 411             # }
 412         ret = req_by_msb(notify_url.format(vnfmid=ignorcase_get(data, 'VNFMID'),
 413                                            vnfInstanceId=ignorcase_get(data, 'vnfinstanceid')),
 414                          "POST", content=json.JSONEncoder().encode(data))
 415
 416         logger.info("[%s]data = %s", fun_name(), ret)
 417         if ret[0] != 0:
 418             return Response(data={'error': ret[1]}, status=ret[2])
 419     except Exception as e:
 420         logger.error("Error occurred in LCM notification.")
 421         raise e
 422     return Response(data=None, status=ret[2])
 423
 424
 425 nf_scaling_url = '/v1/vnfs/{vnfInstanceID}/scale'
 426
 427
 428 @api_view(http_method_names=['POST'])
 429 def scale(request, *args, **kwargs):
 430     logger.info("====scale_vnf===")
 431     try:
 432         logger.info("request.data = %s", request.data)
 433         logger.info("requested_url = %s", request.get_full_path())
 434         vnfm_id = ignorcase_get(kwargs, "vnfmid")
 435         nf_instance_id = ignorcase_get(kwargs, "vnfInstanceId")
 436         ret = vnfm_get(vnfm_id)
 437         if ret[0] != 0:
 438             return Response(data={'error': ret[1]}, status=ret[2])
 439         vnfm_info = json.JSONDecoder().decode(ret[1])
 440         scale_type = ignorcase_get(request.data, "type")
 441         aspect_id = ignorcase_get(request.data, "aspectId")
 442         number_of_steps = ignorcase_get(request.data, "numberOfSteps")
 443         extension = ignorcase_get(request.data, "additionalParam")
 444         vnfd_model = ignorcase_get(extension, "vnfdModel")
 445         data = {
 446             'vnfmid': vnfm_id,
 447             'nfvoid': 1,
 448             'scaletype': '0' if scale_type == 'SCALE_OUT' else '1',
 449             'vmlist': [{'VMNumber':number_of_steps,'VMFlavor':aspect_id}],
 450             'extension':''
 451         }
 452         '''
 453         for vdu_id in get_vdus(vnfd_model, aspect_id):
 454             data['vmlist'].append({
 455                 "VMFlavor": vdu_id,
 456                 "VMNumber": number_of_steps
 457             })
 458         '''
 459         logger.info("data = %s", data)
 460         ret = restcall.call_req(
 461             base_url=ignorcase_get(vnfm_info, "url"),
 462             user=ignorcase_get(vnfm_info, "userName"),
 463             passwd=ignorcase_get(vnfm_info, "password"),
 464             auth_type=restcall.rest_no_auth,
 465             resource=nf_scaling_url.format(vnfInstanceID=nf_instance_id),
 466             method='put',  # POST
 467             content=json.JSONEncoder().encode(data))
 468         logger.info("ret=%s", ret)
 469         if ret[0] != 0:
 470             return Response(data={'error':'scale error'}, status=ret[2])
 471         resp_data = json.JSONDecoder().decode(ret[1])
 472         # jobId = resp_data["jobid"]
 473         logger.info("resp_data=%s", resp_data)
 474     except Exception as e:
 475         logger.error("Error occurred when scaling VNF")
 476         logger.error(traceback.format_exc())
 477         return Response(data={'error':'scale expection'}, status='500')
 478     return Response(data=resp_data, status=ret[2])
 479
 480
 481 nf_healing_url = '/api/v1/nf_m_i/nfs/{vnfInstanceID}/vms/operation'
 482
 483 @api_view(http_method_names=['POST'])
 484 def heal(request, *args, **kwargs):
 485     logger.info("====heal_vnf===")
 486     try:
 487         logger.info("request.data = %s", request.data)
 488         logger.info("requested_url = %s", request.get_full_path())
 489         vnfm_id = ignorcase_get(kwargs, "vnfmid")
 490         nf_instance_id = ignorcase_get(kwargs, "vnfInstanceId")
 491         ret = vnfm_get(vnfm_id)
 492         if ret[0] != 0:
 493             return Response(data={'error': ret[1]}, status=ret[2])
 494         vnfm_info = json.JSONDecoder().decode(ret[1])
 495         data = request.data
 496         data['lifecycleoperation'] = 'operate'
 497         data['isgrace'] = 'force'
 498
 499         logger.info("data = %s", data)
 500         ret = restcall.call_req(
 501             base_url=ignorcase_get(vnfm_info, "url"),
 502             user=ignorcase_get(vnfm_info, "userName"),
 503             passwd=ignorcase_get(vnfm_info, "password"),
 504             auth_type=restcall.rest_no_auth,
 505             resource=nf_healing_url.format(vnfInstanceID=nf_instance_id),
 506             method='put',  # POST
 507             content=json.JSONEncoder().encode(data))
 508         logger.info("ret=%s", ret)
 509         if ret[0] != 0:
 510             return Response(data={'error': 'heal error'}, status=ret[2])
 511         resp_data = json.JSONDecoder().decode(ret[1])
 512         # jobId = resp_data["jobid"]
 513         logger.info("resp_data=%s", resp_data)
 514     except Exception as e:
 515         logger.error("Error occurred when healing VNF")
 516         logger.error(traceback.format_exc())
 517         return Response(data={'error': 'heal expection'}, status='500')
 518     return Response(data=resp_data, status=ret[2])
 519
 520 #@staticmethod
 521 def get_vdus(nf_model, aspect_id):
 522     associated_group = ''
 523     members = []
 524     vnf_flavours = nf_model['vnf_flavours']
 525     for vnf_flaour in vnf_flavours:
 526         scaling_aspects = vnf_flaour['scaling_aspects']
 527         for aspect in scaling_aspects:
 528             if aspect_id == aspect['id']:
 529                 associated_group = aspect['associated_group']
 530                 break
 531     if not associated_group:
 532         logger.error('Cannot find the corresponding element group')
 533         raise Exception('Cannot find the corresponding element group')
 534     for element_group in nf_model['element_groups']:
 535         if element_group['group_id'] == associated_group:
 536             members = element_group['members']
 537     if not members:
 538         logger.error('Cannot find the corresponding members')
 539         raise Exception('Cannot find the corresponding members')
 540     return members
 541
 542
 543 @api_view(http_method_names=['GET'])
 544 def samples(request, *args, **kwargs):
 545     return Response(data={"status": "ok"})