lcm/ns_vnfs/biz/grant_vnf.py

   1 # Copyright 2018 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 json
  16 import logging
  17 import uuid
  18 from lcm.pub.database.models import NfInstModel
  19 from lcm.pub.exceptions import NSLCMException
  20 from lcm.pub.msapi.sdc_run_catalog import query_vnfpackage_by_id
  21 from lcm.pub.utils.values import ignore_case_get
  22 from lcm.pub.msapi import resmgr
  23
  24 logger = logging.getLogger(__name__)
  25
  26
  27 class GrantVnf(object):
  28     def __init__(self, grant_data):
  29         self.data = grant_data
  30
  31     def exec_grant(self):
  32         logger.debug("grant data from vnfm:%s", self.data)
  33         if isinstance(self.data, (unicode, str)):
  34             self.data = json.JSONDecoder().decode(self.data)
  35         has_res_tpl = False
  36         grant_type = None
  37         vimConnections = []
  38         if ignore_case_get(self.data, "addResources"):
  39             grant_type = "addResources"
  40         elif ignore_case_get(self.data, "removeResources"):
  41             grant_type = "removeResources"
  42         else:
  43             has_res_tpl = True
  44
  45         for res in ignore_case_get(self.data, grant_type):
  46             if "resourceTemplate" in res:
  47                 has_res_tpl = True
  48                 break
  49
  50         if not has_res_tpl:
  51             m_vnf_inst_id = ignore_case_get(self.data, "vnfInstanceId")
  52             additional_param = ignore_case_get(self.data, "additionalparams")
  53             vnfm_inst_id = ignore_case_get(additional_param, "vnfmid")
  54             vim_id = ignore_case_get(additional_param, "vimid")
  55
  56             vnfinsts = NfInstModel.objects.filter(
  57                 nfinstid=m_vnf_inst_id, vnfm_inst_id=vnfm_inst_id)
  58             if not vnfinsts:
  59                 raise NSLCMException("Vnfinst(%s) is not found in vnfm(%s)" % (
  60                     m_vnf_inst_id, vnfm_inst_id))
  61
  62             vnf_pkg_id = vnfinsts[0].package_id
  63             nfpackage_info = query_vnfpackage_by_id(vnf_pkg_id)
  64             vnf_pkg = nfpackage_info["packageInfo"]
  65             vnfd = json.JSONDecoder().decode(vnf_pkg["vnfdModel"])
  66
  67             req_param = {
  68                 "vnfInstanceId": m_vnf_inst_id,
  69                 "vimId": vim_id,
  70                 "vnfLcmOpOccId": ignore_case_get(self.data, "vnfLcmOpOccId"),
  71                 "additionalParams": additional_param,
  72                 grant_type: []
  73             }
  74             for res in ignore_case_get(self.data, grant_type):
  75                 vdu_name = ignore_case_get(res, "vdu")
  76                 grant_res = {
  77                     "resourceDefinitionId": ignore_case_get(res, "resourceDefinitionId"),
  78                     "type": ignore_case_get(res, "type"),
  79                     "vdu": vdu_name
  80                 }
  81                 for vdu in vnfd["vdus"]:
  82                     if vdu_name in (vdu["vdu_id"], vdu["properties"].get("name", "")):
  83                         grant_res["resourceTemplate"] = self.get_res_tpl(vdu, vnfd)
  84                         break
  85                 req_param[grant_type].append(grant_res)
  86             self.data = req_param
  87         vimConnections.append(resmgr.grant_vnf(self.data))
  88         grant_resp = {
  89             "id": str(uuid.uuid4()),
  90             "vnfInstanceId": ignore_case_get(self.data, 'vnfInstanceId'),
  91             "vnfLcmOpOccId": ignore_case_get(self.data, "vnfLcmOpOccId"),
  92             "vimConnections": vimConnections
  93         }
  94         logger.debug("grant_resp=%s", grant_resp)
  95         return grant_resp
  96
  97     def get_res_tpl(self, vdu, vnfd):
  98         storage_size = 0
  99         for storage_id in vdu["local_storages"]:
 100             storage_size = storage_size + self.get_storage_size(storage_id, vnfd)
 101         resourceTemplate = {
 102             "virtualComputeDescriptor": {
 103                 "virtualCpu": {
 104                     "numVirtualCpu": int(vdu["virtual_compute"]["virtual_cpu"]["num_virtual_cpu"])
 105                 },
 106                 "virtualMemory": {
 107                     "virtualMemSize": parse_unit(vdu["virtual_compute"]["virtual_memory"]["virtual_mem_size"], "MB")
 108                 }
 109             },
 110             "virtualStorageDescriptor": {
 111                 "typeOfStorage": "",
 112                 "sizeOfStorage": storage_size,
 113                 "swImageDescriptor": ""
 114             }
 115         }
 116         return resourceTemplate
 117
 118     def get_storage_size(self, storage_id, vnfd):
 119         for storage in vnfd["local_storages"]:
 120             if storage_id == storage["local_storage_id"]:
 121                 return parse_unit(storage["properties"]["size"], "GB")
 122         return 0
 123
 124
 125 def parse_unit(val, base_unit):
 126     recognized_units = ["B", "kB", "KiB", "MB", "MiB", "GB", "GiB", "TB", "TiB"]
 127     units_rate = [1, 1000, 1024, 1000000, 1048576, 1000000000, 1073741824, 1000000000000, 1099511627776]
 128     unit_rate_map = {unit.upper(): rate for unit, rate in zip(recognized_units, units_rate)}
 129     num_unit = val.strip().split(" ")
 130     if len(num_unit) != 2:
 131         return val.strip()
 132     num, unit = num_unit[0], num_unit[1]
 133     return int(num) * unit_rate_map[unit.upper()] / unit_rate_map[base_unit.upper()]