lcm/lcm/nf/views/scale_vnf_view.py

   1 # Copyright (C) 2019 ZTE. All Rights Reserved.
   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 logging
  16 import traceback
  17
  18 from drf_yasg.utils import swagger_auto_schema
  19 from rest_framework import status
  20 from rest_framework.response import Response
  21 from rest_framework.views import APIView
  22
  23 from lcm.nf.serializers.scale_vnf_request import ScaleVnfRequestSerializer
  24 from lcm.nf.serializers.response import ProblemDetailsSerializer
  25 from lcm.pub.exceptions import NFLCMException, NFLCMExceptionNotFound, NFLCMExceptionConflict
  26 from lcm.pub.utils.jobutil import JobUtil
  27 from lcm.pub.database.models import NfInstModel
  28 from lcm.nf.const import VNF_STATUS
  29 from lcm.nf.biz.scale_vnf import ScaleVnf
  30
  31 logger = logging.getLogger(__name__)
  32
  33
  34 class ScaleVnfView(APIView):
  35     @swagger_auto_schema(
  36         request_body=ScaleVnfRequestSerializer(),
  37         responses={
  38             status.HTTP_202_ACCEPTED: "Success",
  39             status.HTTP_404_NOT_FOUND: ProblemDetailsSerializer(),
  40             status.HTTP_409_CONFLICT: ProblemDetailsSerializer(),
  41             status.HTTP_500_INTERNAL_SERVER_ERROR: "Internal error"
  42         }
  43     )
  44     def post(self, request, instanceid):
  45         logger.debug("ScaleVnf--post::> %s" % request.data)
  46         try:
  47             scale_vnf_request_serializer = ScaleVnfRequestSerializer(data=request.data)
  48             if not scale_vnf_request_serializer.is_valid():
  49                 raise NFLCMException(scale_vnf_request_serializer.errors)
  50
  51             job_id = JobUtil.create_job('NF', 'SCALE', instanceid)
  52             JobUtil.add_job_status(job_id, 0, "SCALE_VNF_READY")
  53             self.scale_pre_check(instanceid, job_id)
  54
  55             ScaleVnf(scale_vnf_request_serializer.data, instanceid, job_id).start()
  56
  57             response = Response(data={"jobId": job_id}, status=status.HTTP_202_ACCEPTED)
  58             return response
  59         except NFLCMExceptionNotFound as e:
  60             probDetail = ProblemDetailsSerializer(data={"status": status.HTTP_404_NOT_FOUND, "detail": "VNF Instance not found"})
  61             resp_isvalid = probDetail.is_valid()
  62             if not resp_isvalid:
  63                 raise NFLCMException(probDetail.errors)
  64             return Response(data=probDetail.data, status=status.HTTP_404_NOT_FOUND)
  65         except NFLCMExceptionConflict as e:
  66             probDetail = ProblemDetailsSerializer(data={"status": status.HTTP_409_CONFLICT, "detail": "VNF Instance not in Instantiated State"})
  67             resp_isvalid = probDetail.is_valid()
  68             if not resp_isvalid:
  69                 raise NFLCMException(probDetail.errors)
  70             return Response(data=probDetail.data, status=status.HTTP_409_CONFLICT)
  71         except NFLCMException as e:
  72             logger.error(e.message)
  73             return Response(data={'error': '%s' % e.message}, status=status.HTTP_500_INTERNAL_SERVER_ERROR)
  74         except Exception as e:
  75             logger.error(e.message)
  76             logger.error(traceback.format_exc())
  77             return Response(data={'error': 'unexpected exception'}, status=status.HTTP_500_INTERNAL_SERVER_ERROR)
  78
  79     def scale_pre_check(self, nf_inst_id, job_id):
  80         vnf_insts = NfInstModel.objects.filter(nfinstid=nf_inst_id)
  81         if not vnf_insts.exists():
  82             raise NFLCMExceptionNotFound("VNF nf_inst_id does not exist.")
  83
  84         NfInstModel.objects.filter(nfinstid=nf_inst_id).update(status=VNF_STATUS.SCALING)
  85         JobUtil.add_job_status(job_id, 15, 'Nf scaling pre-check finish')
  86         logger.info("Nf scaling pre-check finish")