osm_lcm/data_utils/vim.py

   1 # -*- coding: utf-8 -*-
   2
   3 # Copyright 2020 Whitestack, LLC
   4 # *************************************************************
   5 #
   6 # This file is part of OSM Monitoring module
   7 # All Rights Reserved to Whitestack, LLC
   8 #
   9 # Licensed under the Apache License, Version 2.0 (the "License"); you may
  10 # not use this file except in compliance with the License. You may obtain
  11 # a copy of the License at
  12 #
  13 #         http://www.apache.org/licenses/LICENSE-2.0
  14 #
  15 # Unless required by applicable law or agreed to in writing, software
  16 # distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
  17 # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
  18 # License for the specific language governing permissions and limitations
  19 # under the License.
  20 #
  21 # For those usages not covered by the Apache License, Version 2.0 please
  22 # contact: fbravo@whitestack.com
  23 ##
  24
  25 from osm_lcm.data_utils.database.vim_account import VimAccountDB
  26
  27 __author__ = (
  28     "Lluis Gifre <lluis.gifre@cttc.es>, Ricard Vilalta <ricard.vilalta@cttc.es>"
  29 )
  30
  31
  32 def get_vims_to_connect(db_nsr, db_vnfrs, target_vld, logger):
  33     vims_to_connect = set()
  34     vld = next(
  35         (vld for vld in db_nsr["vld"] if vld["id"] == target_vld["id"]),
  36         None,
  37     )
  38     if vld is None:
  39         return vims_to_connect  # VLD not in NS, means it is an internal VLD within a single VIM
  40
  41     vim_ids = set()
  42     if "vnfd-connection-point-ref" in vld:
  43         # during planning of VNF, use "vnfd-connection-point-ref" since "vim_info" is not available in vld
  44         # get VNFD connection points (if available)
  45         # iterate over VNFs and retrieve VIM IDs they are planned to be deployed to
  46         vnfd_connection_point_ref = vld["vnfd-connection-point-ref"]
  47         for vld_member_vnf_index_ref in vnfd_connection_point_ref:
  48             vld_member_vnf_index_ref = vld_member_vnf_index_ref["member-vnf-index-ref"]
  49             vim_ids.add(db_vnfrs[vld_member_vnf_index_ref]["vim-account-id"])
  50     elif "vim_info" in vld:
  51         # after instantiation of VNF, use "vim_info" since "vnfd-connection-point-ref" is not available in vld
  52         # get VIM info (if available)
  53         # iterate over VIM info and retrieve VIM IDs they are deployed to
  54         vim_info = vld["vim_info"]
  55         for vim_data in vim_info.values():
  56             vim_ids.add(vim_data["vim_account_id"])
  57     else:
  58         # TODO: analyze if this situation is possible
  59         # unable to retrieve planned/executed mapping of VNFs to VIMs
  60         # by now, drop a log message for future debugging
  61         logger.warning(
  62             " ".join(
  63                 [
  64                     "Unable to identify VIMs involved in VLD to check if WIM is required.",
  65                     "Dumping internal variables for further debugging:",
  66                 ]
  67             )
  68         )
  69         logger.warning("db_nsr={:s}".format(str(db_nsr)))
  70         logger.warning("db_vnfrs={:s}".format(str(db_vnfrs)))
  71         logger.warning("target_vld={:s}".format(str(target_vld)))
  72         return vims_to_connect
  73
  74     for vim_id in vim_ids:
  75         db_vim = VimAccountDB.get_vim_account_with_id(vim_id)
  76         if db_vim is None:
  77             continue
  78         vims_to_connect.add(db_vim["name"])
  79     return vims_to_connect