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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 json
import logging
import os
import copy
from lcm.pub.database.models import NfInstModel
from lcm.pub.database.models import NSInstModel
from lcm.ns.vnfs.const import VNF_STATUS
from lcm.pub.msapi import catalog
logger = logging.getLogger(__name__)
SCALE_TYPE = ("SCALE_NS", "SCALE_VNF")
scale_vnf_data_mapping = {
"vnfInstanceId": "",
"scaleByStepData": {
"type": "",
"aspectId": "",
"numberOfSteps": ""
}
}
def ignorcase_get(args, key):
if not key:
return ""
if not args:
return ""
if key in args:
return args[key]
for old_key in args:
if old_key.upper() == key.upper():
return args[old_key]
return ""
def mapping_conv(keyword_map, rest_return):
resp_data = {}
for param in keyword_map:
if keyword_map[param]:
if isinstance(keyword_map[param], dict):
resp_data[param] = mapping_conv(
keyword_map[param], ignorcase_get(
rest_return, param))
else:
resp_data[param] = ignorcase_get(rest_return, param)
return resp_data
def get_vnf_scale_info(filename, ns_instanceId, aspect, step):
json_data = get_json_data(filename)
scale_options = ignorcase_get(json_data, "scale_options")
for i in range(scale_options.__len__()):
ns_scale_option = scale_options[i]
if (ignorcase_get(ns_scale_option, "ns_instanceId") == ns_instanceId) \
and (ignorcase_get(ns_scale_option, "ns_scale_aspect") == aspect):
ns_scale_info_list = ignorcase_get(
ns_scale_option, "ns_scale_info_list")
for j in range(ns_scale_info_list.__len__()):
ns_scale_info = ns_scale_info_list[j]
if ns_scale_info["step"] == step:
return ns_scale_info["vnf_scale_info"]
return None
def get_vnf_instance_id_list(vnfd_id):
kwargs = {}
kwargs['package_id'] = vnfd_id
kwargs['status'] = VNF_STATUS.ACTIVE
nf_model_list = NfInstModel.objects.filter(**kwargs)
vnf_instance_id_list = list()
nf_model_len = nf_model_list.__len__()
if nf_model_len == 0:
logger.error("No VNF instances found(vnfd_id=%s)" % vnfd_id)
else:
for i in range(nf_model_len):
vnf_instance_id_list.append(nf_model_list[i].nfinstid)
return vnf_instance_id_list
def get_json_data(filename):
f = open(filename)
json_str = f.read()
data = json.JSONDecoder().decode(json_str)
f.close()
return data
def check_scale_list(vnf_scale_list, ns_instanceId, aspect, step):
if vnf_scale_list is None or vnf_scale_list.__len__() == 0:
logger.debug(
"The scaling option[ns=%s, aspect=%s, step=%s] does not exist. Pls check the config file." %
(ns_instanceId, aspect, step))
raise Exception(
"The scaling option[ns=%s, aspect=%s, step=%s] does not exist. Pls check the config file." %
(ns_instanceId, aspect, step))
else:
return vnf_scale_list
def get_scale_vnf_data_list(filename, ns_instanceId, aspect, step, scale_type):
vnf_scale_list = get_vnf_scale_info(filename, ns_instanceId, aspect, step)
check_scale_list(vnf_scale_list, ns_instanceId, aspect, step)
scaleVnfDataList = set_scaleVnfData_type(vnf_scale_list, scale_type)
logger.debug("scaleVnfDataList = %s" % scaleVnfDataList)
return scaleVnfDataList
# Get the nsd id according to the ns instance id.
def get_nsdId(ns_instanceId):
if NSInstModel.objects.filter(id=ns_instanceId):
nsd_id = NSInstModel.objects.filter(id=ns_instanceId)[0].nsd_id
return nsd_id
return None
def check_and_set_params(scaleNsData, ns_InstanceId):
if scaleNsData is None:
raise Exception("Error! scaleNsData in the request is Empty!")
scaleNsByStepsData = scaleNsData[0]["scaleNsByStepsData"][0]
if scaleNsByStepsData is None:
raise Exception("Error! scaleNsByStepsData in the request is Empty!")
aspect = scaleNsByStepsData["aspectId"]
numberOfSteps = scaleNsByStepsData["numberOfSteps"]
scale_type = scaleNsByStepsData["scalingDirection"]
return aspect, numberOfSteps, scale_type
def get_scale_vnf_data(scaleNsData, ns_InstanceId):
curdir_path = os.path.dirname(
os.path.dirname(
os.path.dirname(
os.path.abspath(__file__))))
filename = curdir_path + "/ns/data/scalemapping.json"
logger.debug("filename = %s" % filename)
aspect, numberOfSteps, scale_type = check_and_set_params(
scaleNsData, ns_InstanceId)
return get_scale_vnf_data_list(
filename,
ns_InstanceId,
aspect,
numberOfSteps,
scale_type)
# Get scaling vnf data info list according to the ns instance id and request ScaleNsData.
def get_scale_vnf_data_info_list(scaleNsData, ns_InstanceId):
# Gets the nsd id accordign to the ns instance id.
nsd_id = get_nsdId(ns_InstanceId)
# Gets the scalingmap json data from the package according to the ns instance id.
scalingmap_json = catalog.get_scalingmap_json_package(ns_InstanceId)
# Gets and checks the values of parameters.
aspect, numberOfSteps, scale_type = check_and_set_params(
scaleNsData, ns_InstanceId)
# Firstly, gets the scaling vnf data info list from the scaling map json data.
scale_vnf_data_info_list_from_json = get_scale_vnf_data_from_json(scalingmap_json, nsd_id, aspect, numberOfSteps)
check_scale_list(scale_vnf_data_info_list_from_json, ns_InstanceId, aspect, numberOfSteps)
# Secondly, adds the property of vnfInstanceId to the list according to the vnfd id.
scale_vnf_data_info_list = set_scacle_vnf_instance_id(scale_vnf_data_info_list_from_json)
check_scale_list(scale_vnf_data_info_list, ns_InstanceId, aspect, numberOfSteps)
# Lastly, adds the property of type to the list acoording to the request ScaleNsData.
scale_vnf_data_info_list = set_scaleVnfData_type(scale_vnf_data_info_list, scale_type)
check_scale_list(scale_vnf_data_info_list, ns_InstanceId, aspect, numberOfSteps)
return scale_vnf_data_info_list
# Get the vnf scaling info from the scaling_map.json according to the ns package id.
def get_scale_vnf_data_from_json(scalingmap_json, nsd_id, aspect, step):
scale_options = ignorcase_get(scalingmap_json, "scale_options")
for i in range(scale_options.__len__()):
ns_scale_option = scale_options[i]
if (ignorcase_get(ns_scale_option, "nsd_id") == nsd_id) and (
ignorcase_get(ns_scale_option, "ns_scale_aspect") == aspect):
ns_scale_info_list = ignorcase_get(
ns_scale_option, "ns_scale_info")
for j in range(ns_scale_info_list.__len__()):
ns_scale_info = ns_scale_info_list[j]
if ns_scale_info["step"] == step:
vnf_scale_info_list = ns_scale_info["vnf_scale_info"]
return vnf_scale_info_list
logger.error("get_scale_vnf_data_from_json method retuan null")
return None
# Gets the vnf instance id according to the vnfd_id and modify the list of scaling vnf info accrodingly.
def set_scacle_vnf_instance_id(vnf_scale_info_list):
scale_vnf_data_info_list = []
for i in range(vnf_scale_info_list.__len__()):
vnf_scale_info = vnf_scale_info_list[i]
vnfd_id = vnf_scale_info["vnfd_id"]
vnf_instance_id_list = get_vnf_instance_id_list(vnfd_id)
index = 0
while index < vnf_instance_id_list.__len__():
copy_vnf_scale_info = copy.deepcopy(vnf_scale_info)
copy_vnf_scale_info.pop("vnfd_id")
copy_vnf_scale_info["vnfInstanceId"] = vnf_instance_id_list[index]
index += 1
scale_vnf_data_info_list.append(copy_vnf_scale_info)
return scale_vnf_data_info_list
# Sets the scaling type of vnf data info list.
def set_scaleVnfData_type(vnf_scale_list, scale_type):
logger.debug(
"vnf_scale_list = %s, type = %s" %
(vnf_scale_list, scale_type))
scaleVnfDataList = []
if vnf_scale_list is not None:
for i in range(vnf_scale_list.__len__()):
scaleVnfData = copy.deepcopy(scale_vnf_data_mapping)
scaleVnfData["vnfInstanceId"] = vnf_scale_list[i]["vnfInstanceId"]
scaleVnfData["scaleByStepData"]["type"] = scale_type
scaleVnfData["scaleByStepData"]["aspectId"] = vnf_scale_list[i]["vnf_scaleAspectId"]
scaleVnfData["scaleByStepData"]["numberOfSteps"] = vnf_scale_list[i]["numberOfSteps"]
scaleVnfDataList.append(scaleVnfData)
logger.debug("scaleVnfDataList = %s" % scaleVnfDataList)
return scaleVnfDataList
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