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# Copyright 2017 ZTE Corporation.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import datetime
import logging
import threading
import time
import traceback
from lcm.ns.const import NS_INST_STATUS
from lcm.ns.vnfs.scale_vnfs import NFManualScaleService
from lcm.pub.database.models import JobModel, NSInstModel
from lcm.pub.exceptions import NSLCMException
from lcm.pub.utils.jobutil import JobUtil, JOB_MODEL_STATUS
from lcm.pub.utils.values import ignore_case_get
from lcm.pub.utils.scaleaspect import get_scale_vnf_data_info_list
JOB_ERROR = 255
SCALE_TYPE = ("SCALE_NS", "SCALE_VNF")
logger = logging.getLogger(__name__)
class NSManualScaleService(threading.Thread):
def __init__(self, ns_instance_id, request_data, job_id):
super(NSManualScaleService, self).__init__()
self.ns_instance_id = ns_instance_id
self.request_data = request_data
self.job_id = job_id
self.scale_vnf_data = ''
def run(self):
try:
self.do_biz()
except NSLCMException as e:
JobUtil.add_job_status(self.job_id, JOB_ERROR, e.message)
except Exception as ex:
logger.error(ex.message)
logger.error(traceback.format_exc())
JobUtil.add_job_status(self.job_id, JOB_ERROR, 'ns scale fail')
finally:
self.update_ns_status(NS_INST_STATUS.ACTIVE)
def do_biz(self):
self.update_job(1, desc='ns scale start')
self.update_ns_status(NS_INST_STATUS.SCALING)
self.check_and_set_params()
self.do_vnfs_scale()
self.update_job(100, desc='ns scale success')
def check_and_set_params(self):
scale_type = ignore_case_get(self.request_data, 'scaleType')
if scale_type != SCALE_TYPE[0]:
raise NSLCMException('scaleType should be SCALE_NS.')
scale_ns_data = ignore_case_get(self.request_data, 'scaleNsData')
self.scale_vnf_data = get_scale_vnf_data_info_list(
scale_ns_data, self.ns_instance_id)
logger.debug('scale_vnf_data = %s' % self.scale_vnf_data)
if not self.scale_vnf_data:
raise NSLCMException('Failed to get scaleVnfData parameter')
def do_vnfs_scale(self):
for i in range(len(self.scale_vnf_data)):
vnf_scale_params = self.prepare_vnf_scale_params(
self.scale_vnf_data[i])
count = len(self.scale_vnf_data)
progress_range = [11 + 80 / count * i, 10 + 80 / count * (i + 1)]
status = self.do_vnf_scale(vnf_scale_params, progress_range)
if status is JOB_MODEL_STATUS.FINISHED:
logger.info(
'nf[%s] scale handle end' %
vnf_scale_params.get('vnfInstanceId'))
self.update_job(
progress_range[1],
desc='nf[%s] scale handle end' %
vnf_scale_params.get('vnfInstanceId'))
else:
raise NSLCMException('VNF scale failed')
def prepare_vnf_scale_params(self, vnf_data):
return {
"vnfInstanceId": ignore_case_get(vnf_data, 'vnfInstanceId'),
"scaleVnfData": ignore_case_get(vnf_data, 'scaleByStepData'),
"nsInstanceId": self.ns_instance_id
}
def do_vnf_scale(self, vnf_scale_params, progress_range):
nf_inst_id = vnf_scale_params.get('vnfInstanceId')
nf_service = NFManualScaleService(nf_inst_id, vnf_scale_params)
nf_service.start()
self.update_job(
progress_range[0],
desc='nf[%s] scale handle start' %
nf_inst_id)
status = self.wait_job_finish(nf_service.job_id)
return status
@staticmethod
def wait_job_finish(sub_job_id, timeout=3600):
query_interval = 2
start_time = end_time = datetime.datetime.now()
while (end_time - start_time).seconds < timeout:
job_result = JobModel.objects.get(jobid=sub_job_id)
time.sleep(query_interval)
end_time = datetime.datetime.now()
if job_result.progress == 100:
return JOB_MODEL_STATUS.FINISHED
if job_result.progress > 100:
return JOB_MODEL_STATUS.ERROR
return JOB_MODEL_STATUS.TIMEOUT
def update_job(self, progress, desc=''):
JobUtil.add_job_status(self.job_id, progress, desc)
def update_ns_status(self, status):
NSInstModel.objects.filter(
id=self.ns_instance_id).update(
status=status)
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