lcm/ns/ns_heal.py

   1 # Copyright 2017 Intel 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 logging
  16 import threading
  17 import traceback
  18 import datetime
  19 import time
  20
  21 from lcm.ns.const import NS_INST_STATUS
  22 from lcm.pub.database.models import JobModel, NSInstModel, NfInstModel
  23 from lcm.ns.vnfs.heal_vnfs import NFHealService
  24 from lcm.pub.exceptions import NSLCMException
  25 from lcm.pub.utils.jobutil import JobUtil, JOB_MODEL_STATUS
  26 from lcm.pub.utils.values import ignore_case_get
  27
  28 JOB_ERROR = 255
  29 logger = logging.getLogger(__name__)
  30
  31
  32 class NSHealService(threading.Thread):
  33     def __init__(self, ns_instance_id, request_data, job_id):
  34         super(NSHealService, self).__init__()
  35         self.ns_instance_id = ns_instance_id
  36         self.request_data = request_data
  37         self.job_id = job_id
  38
  39         self.heal_vnf_data = ''
  40
  41     def run(self):
  42         try:
  43             self.do_biz()
  44         except NSLCMException as e:
  45             JobUtil.add_job_status(self.job_id, JOB_ERROR, e.message)
  46         except:
  47             logger.error(traceback.format_exc())
  48             JobUtil.add_job_status(self.job_id, JOB_ERROR, 'ns heal fail')
  49
  50     def do_biz(self):
  51         self.update_job(1, desc='ns heal start')
  52         self.get_and_check_params()
  53         self.update_ns_status(NS_INST_STATUS.HEALING)
  54         self.do_vnfs_heal()
  55         self.update_ns_status(NS_INST_STATUS.ACTIVE)
  56         self.update_job(100, desc='ns heal success')
  57
  58     def get_and_check_params(self):
  59         ns_info = NSInstModel.objects.filter(id=self.ns_instance_id)
  60         if not ns_info:
  61             logger.error('NS [id=%s] does not exist' % self.ns_instance_id)
  62             raise NSLCMException('NS [id=%s] does not exist' % self.ns_instance_id)
  63         self.heal_vnf_data = ignore_case_get(self.request_data, 'healVnfData')
  64         if not self.heal_vnf_data:
  65             logger.error('healVnfData parameter does not exist or value is incorrect.')
  66             raise NSLCMException('healVnfData parameter does not exist or value incorrect.')
  67
  68     def do_vnfs_heal(self):
  69         vnf_heal_params = self.prepare_vnf_heal_params(self.heal_vnf_data)
  70         count = len(self.heal_vnf_data)
  71         # TODO(sshank): Check progress_range
  72         progress_range = [11 + 80 / count, 10 + 80 / count]
  73         status = self.do_vnf_heal(vnf_heal_params, progress_range)
  74         if status is JOB_MODEL_STATUS.FINISHED:
  75             logger.info('nf[%s] heal handle end' % vnf_heal_params.get('vnfInstanceId'))
  76             self.update_job(progress_range[1],
  77                             desc='nf[%s] heal handle end' % vnf_heal_params.get('vnfInstanceId'))
  78         else:
  79             logger.error('nf heal failed')
  80             raise NSLCMException('nf heal failed')
  81
  82     def do_vnf_heal(self, vnf_heal_params, progress_range):
  83         vnf_instance_id = vnf_heal_params.get('vnfInstanceId')
  84         nf_service = NFHealService(vnf_instance_id, vnf_heal_params)
  85         nf_service.start()
  86         self.update_job(progress_range[0], desc='nf[%s] heal handle start' % vnf_instance_id)
  87         status = self.wait_job_finish(nf_service.job_id)
  88         return status
  89
  90     def prepare_vnf_heal_params(self, vnf_data):
  91         vnf_instance_id = ignore_case_get(vnf_data, 'vnfInstanceId')
  92         cause = ignore_case_get(vnf_data, "cause")
  93         additional_params = ignore_case_get(vnf_data, "additionalParams")
  94         result = {
  95             "vnfInstanceId": vnf_instance_id,
  96             "cause": cause,
  97             "additionalParams": additional_params
  98         }
  99         return result
 100
 101     @staticmethod
 102     def wait_job_finish(sub_job_id, timeout=3600):
 103         query_interval = 2
 104         start_time = end_time = datetime.datetime.now()
 105         while (end_time - start_time).seconds < timeout:
 106             job_result = JobModel.objects.get(jobid=sub_job_id)
 107             time.sleep(query_interval)
 108             end_time = datetime.datetime.now()
 109             if job_result.progress == 100:
 110                 return JOB_MODEL_STATUS.FINISHED
 111             elif job_result.progress > 100:
 112                 return JOB_MODEL_STATUS.ERROR
 113             else:
 114                 continue
 115         return JOB_MODEL_STATUS.TIMEOUT
 116
 117     def update_job(self, progress, desc=''):
 118         JobUtil.add_job_status(self.job_id, progress, desc)
 119
 120     def update_ns_status(self, status):
 121         NSInstModel.objects.filter(id=self.ns_instance_id).update(status=status)