osm_lcm/netslice.py

   1 # -*- coding: utf-8 -*-
   2 ##
   3 # Licensed under the Apache License, Version 2.0 (the "License"); you may
   4 # not use this file except in compliance with the License. You may obtain
   5 # 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, WITHOUT
  11 # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
  12 # License for the specific language governing permissions and limitations
  13 # under the License.
  14 ##
  15
  16 import asyncio
  17 import logging
  18 import logging.handlers
  19 import traceback
  20 from osm_lcm import ROclient
  21 from osm_lcm.lcm_utils import LcmException, LcmBase, populate_dict, get_iterable, deep_get
  22 from osm_common.dbbase import DbException
  23 from time import time
  24 from copy import deepcopy
  25
  26
  27 __author__ = "Felipe Vicens, Pol Alemany, Alfonso Tierno"
  28
  29
  30 class NetsliceLcm(LcmBase):
  31
  32     timeout_nsi_deploy = 2 * 3600  # default global timeout for deployment a nsi
  33
  34     def __init__(self, db, msg, fs, lcm_tasks, config, loop, ns):
  35         """
  36         Init, Connect to database, filesystem storage, and messaging
  37         :param config: two level dictionary with configuration. Top level should contain 'database', 'storage',
  38         :return: None
  39         """
  40         # logging
  41         self.logger = logging.getLogger('lcm.netslice')
  42         self.loop = loop
  43         self.lcm_tasks = lcm_tasks
  44         self.ns = ns
  45         self.ro_config = config["ro_config"]
  46         self.timeout = config["timeout"]
  47
  48         super().__init__(db, msg, fs, self.logger)
  49
  50     def nsi_update_nsir(self, nsi_update_nsir, db_nsir, nsir_desc_RO):
  51         """
  52         Updates database nsir with the RO info for the created vld
  53         :param nsi_update_nsir: dictionary to be filled with the updated info
  54         :param db_nsir: content of db_nsir. This is also modified
  55         :param nsir_desc_RO: nsir descriptor from RO
  56         :return: Nothing, LcmException is raised on errors
  57         """
  58
  59         for vld_index, vld in enumerate(get_iterable(db_nsir, "vld")):
  60             for net_RO in get_iterable(nsir_desc_RO, "nets"):
  61                 if vld["id"] != net_RO.get("ns_net_osm_id"):
  62                     continue
  63                 vld["vim-id"] = net_RO.get("vim_net_id")
  64                 vld["name"] = net_RO.get("vim_name")
  65                 vld["status"] = net_RO.get("status")
  66                 vld["status-detailed"] = net_RO.get("error_msg")
  67                 nsi_update_nsir["vld.{}".format(vld_index)] = vld
  68                 break
  69             else:
  70                 raise LcmException("ns_update_nsir: Not found vld={} at RO info".format(vld["id"]))
  71
  72     async def instantiate(self, nsir_id, nsilcmop_id):
  73
  74         # Try to lock HA task here
  75         task_is_locked_by_me = self.lcm_tasks.lock_HA('nsi', 'nsilcmops', nsilcmop_id)
  76         if not task_is_locked_by_me:
  77             return
  78
  79         logging_text = "Task netslice={} instantiate={} ".format(nsir_id, nsilcmop_id)
  80         self.logger.debug(logging_text + "Enter")
  81         # get all needed from database
  82         exc = None
  83         db_nsir = None
  84         db_nsilcmop = None
  85         db_nsir_update = {"_admin.nsilcmop": nsilcmop_id}
  86         db_nsilcmop_update = {}
  87         nsilcmop_operation_state = None
  88         vim_2_RO = {}
  89         RO = ROclient.ROClient(self.loop, **self.ro_config)
  90
  91         def ip_profile_2_RO(ip_profile):
  92             RO_ip_profile = deepcopy((ip_profile))
  93             if "dns-server" in RO_ip_profile:
  94                 if isinstance(RO_ip_profile["dns-server"], list):
  95                     RO_ip_profile["dns-address"] = []
  96                     for ds in RO_ip_profile.pop("dns-server"):
  97                         RO_ip_profile["dns-address"].append(ds['address'])
  98                 else:
  99                     RO_ip_profile["dns-address"] = RO_ip_profile.pop("dns-server")
 100             if RO_ip_profile.get("ip-version") == "ipv4":
 101                 RO_ip_profile["ip-version"] = "IPv4"
 102             if RO_ip_profile.get("ip-version") == "ipv6":
 103                 RO_ip_profile["ip-version"] = "IPv6"
 104             if "dhcp-params" in RO_ip_profile:
 105                 RO_ip_profile["dhcp"] = RO_ip_profile.pop("dhcp-params")
 106             return RO_ip_profile
 107
 108         def vim_account_2_RO(vim_account):
 109             """
 110             Translate a RO vim_account from OSM vim_account params
 111             :param ns_params: OSM instantiate params
 112             :return: The RO ns descriptor
 113             """
 114             if vim_account in vim_2_RO:
 115                 return vim_2_RO[vim_account]
 116
 117             db_vim = self.db.get_one("vim_accounts", {"_id": vim_account})
 118             if db_vim["_admin"]["operationalState"] != "ENABLED":
 119                 raise LcmException("VIM={} is not available. operationalState={}".format(
 120                     vim_account, db_vim["_admin"]["operationalState"]))
 121             RO_vim_id = db_vim["_admin"]["deployed"]["RO"]
 122             vim_2_RO[vim_account] = RO_vim_id
 123             return RO_vim_id
 124
 125         async def netslice_scenario_create(self, vld_item, nsir_id, db_nsir, db_nsir_admin, db_nsir_update):
 126             """
 127             Create a network slice VLD through RO Scenario
 128             :param vld_id The VLD id inside nsir to be created
 129             :param nsir_id The nsir id
 130             """
 131             ip_vld = None
 132             mgmt_network = False
 133             RO_vld_sites = []
 134             vld_id = vld_item["id"]
 135             netslice_vld = vld_item
 136             # logging_text = "Task netslice={} instantiate_vld={} ".format(nsir_id, vld_id)
 137             # self.logger.debug(logging_text + "Enter")
 138
 139             vld_shared = None
 140             for shared_nsrs_item in get_iterable(vld_item, "shared-nsrs-list"):
 141                 _filter = {"_id.ne": nsir_id, "_admin.nsrs-detailed-list.ANYINDEX.nsrId": shared_nsrs_item}
 142                 shared_nsi = self.db.get_one("nsis", _filter, fail_on_empty=False, fail_on_more=False)
 143                 if shared_nsi:
 144                     for vlds in get_iterable(shared_nsi["_admin"]["deployed"], "RO"):
 145                         if vld_id == vlds["vld_id"]:
 146                             vld_shared = {"instance_scenario_id": vlds["netslice_scenario_id"], "osm_id": vld_id}
 147                             break
 148                     break
 149
 150             # Creating netslice-vld at RO
 151             RO_nsir = deep_get(db_nsir, ("_admin", "deployed", "RO"), [])
 152
 153             if vld_id in RO_nsir:
 154                 db_nsir_update["_admin.deployed.RO"] = RO_nsir
 155
 156             # If netslice-vld doesn't exists then create it
 157             else:
 158                 # TODO: Check VDU type in all descriptors finding SRIOV / PT
 159                 # Updating network names and datacenters from instantiation parameters for each VLD
 160                 RO_ns_params = {}
 161                 RO_ns_params["name"] = netslice_vld["name"]
 162                 RO_ns_params["datacenter"] = vim_account_2_RO(db_nsir["instantiation_parameters"]["vimAccountId"])
 163                 for instantiation_params_vld in get_iterable(db_nsir["instantiation_parameters"], "netslice-vld"):
 164                     if instantiation_params_vld.get("name") == netslice_vld["name"]:
 165                         ip_vld = deepcopy(instantiation_params_vld)
 166
 167                 if netslice_vld.get("mgmt-network"):
 168                     mgmt_network = True
 169
 170                 # Creating scenario if vim-network-name / vim-network-id are present as instantiation parameter
 171                 # Use vim-network-id instantiation parameter
 172                 vim_network_option = None
 173                 if ip_vld:
 174                     if ip_vld.get("vim-network-id"):
 175                         vim_network_option = "vim-network-id"
 176                     elif ip_vld.get("vim-network-name"):
 177                         vim_network_option = "vim-network-name"
 178                     if ip_vld.get("ip-profile"):
 179                         populate_dict(RO_ns_params, ("networks", netslice_vld["name"], "ip-profile"),
 180                                       ip_profile_2_RO(ip_vld["ip-profile"]))
 181
 182                 if vim_network_option:
 183                     if ip_vld.get(vim_network_option):
 184                         if isinstance(ip_vld.get(vim_network_option), list):
 185                             for vim_net_id in ip_vld.get(vim_network_option):
 186                                 for vim_account, vim_net in vim_net_id.items():
 187                                     RO_vld_sites.append({
 188                                         "netmap-use": vim_net,
 189                                         "datacenter": vim_account_2_RO(vim_account)
 190                                     })
 191                         elif isinstance(ip_vld.get(vim_network_option), dict):
 192                             for vim_account, vim_net in ip_vld.get(vim_network_option).items():
 193                                 RO_vld_sites.append({
 194                                     "netmap-use": vim_net,
 195                                     "datacenter": vim_account_2_RO(vim_account)
 196                                 })
 197                         else:
 198                             RO_vld_sites.append({
 199                                 "netmap-use": ip_vld[vim_network_option],
 200                                 "datacenter": vim_account_2_RO(netslice_vld["vimAccountId"])})
 201
 202                 # Use default netslice vim-network-name from template
 203                 else:
 204                     for nss_conn_point_ref in get_iterable(netslice_vld, "nss-connection-point-ref"):
 205                         if nss_conn_point_ref.get("vimAccountId"):
 206                             if nss_conn_point_ref["vimAccountId"] != netslice_vld["vimAccountId"]:
 207                                 RO_vld_sites.append({
 208                                     "netmap-create": None,
 209                                     "datacenter": vim_account_2_RO(nss_conn_point_ref["vimAccountId"])})
 210
 211                 if vld_shared:
 212                     populate_dict(RO_ns_params, ("networks", netslice_vld["name"], "use-network"), vld_shared)
 213
 214                 if RO_vld_sites:
 215                     populate_dict(RO_ns_params, ("networks", netslice_vld["name"], "sites"), RO_vld_sites)
 216
 217                 RO_ns_params["scenario"] = {"nets": [{"name": netslice_vld["name"],
 218                                             "external": mgmt_network, "type": "bridge"}]}
 219
 220                 # self.logger.debug(logging_text + step)
 221                 desc = await RO.create("ns", descriptor=RO_ns_params)
 222                 db_nsir_update_RO = {}
 223                 db_nsir_update_RO["netslice_scenario_id"] = desc["uuid"]
 224                 db_nsir_update_RO["vld_id"] = RO_ns_params["name"]
 225                 db_nsir_update["_admin.deployed.RO"].append(db_nsir_update_RO)
 226
 227         def overwrite_nsd_params(self, db_nsir, nslcmop):
 228             RO_list = []
 229             vld_op_list = []
 230             vld = None
 231             nsr_id = nslcmop.get("nsInstanceId")
 232             # Overwrite instantiation parameters in netslice runtime
 233             if db_nsir.get("_admin"):
 234                 if db_nsir["_admin"].get("deployed"):
 235                     db_admin_deployed_nsir = db_nsir["_admin"].get("deployed")
 236                     if db_admin_deployed_nsir.get("RO"):
 237                         RO_list = db_admin_deployed_nsir["RO"]
 238
 239             for RO_item in RO_list:
 240                 for netslice_vld in get_iterable(db_nsir["_admin"], "netslice-vld"):
 241                     # if is equal vld of _admin with vld of netslice-vld then go for the CPs
 242                     if RO_item.get("vld_id") == netslice_vld.get("id"):
 243                         # Search the cp of netslice-vld that match with nst:netslice-subnet
 244                         for nss_cp_item in get_iterable(netslice_vld, "nss-connection-point-ref"):
 245                             # Search the netslice-subnet of nst that match
 246                             for nss in get_iterable(db_nsir["_admin"], "netslice-subnet"):
 247                                 # Compare nss-ref equal nss from nst
 248                                 if nss_cp_item["nss-ref"] == nss["nss-id"]:
 249                                     db_nsds = self.db.get_one("nsds", {"_id": nss["nsdId"]})
 250                                     # Go for nsd, and search the CP that match with nst:CP to get vld-id-ref
 251                                     for cp_nsd in db_nsds.get("connection-point", ()):
 252                                         if cp_nsd["name"] == nss_cp_item["nsd-connection-point-ref"]:
 253                                             if nslcmop.get("operationParams"):
 254                                                 if nslcmop["operationParams"].get("nsName") == nss["nsName"]:
 255                                                     vld_id = RO_item["vld_id"]
 256                                                     netslice_scenario_id = RO_item["netslice_scenario_id"]
 257                                                     nslcmop_vld = {}
 258                                                     nslcmop_vld["ns-net"] = {vld_id: netslice_scenario_id}
 259                                                     nslcmop_vld["name"] = cp_nsd["vld-id-ref"]
 260                                                     for vld in get_iterable(nslcmop["operationParams"], "vld"):
 261                                                         if vld["name"] == cp_nsd["vld-id-ref"]:
 262                                                             nslcmop_vld.update(vld)
 263                                                     vld_op_list.append(nslcmop_vld)
 264             nslcmop["operationParams"]["vld"] = vld_op_list
 265             self.update_db_2("nslcmops", nslcmop["_id"], {"operationParams.vld": vld_op_list})
 266             return nsr_id, nslcmop
 267
 268         try:
 269             # wait for any previous tasks in process
 270             await self.lcm_tasks.waitfor_related_HA('nsi', 'nsilcmops', nsilcmop_id)
 271
 272             step = "Getting nsir={} from db".format(nsir_id)
 273             db_nsir = self.db.get_one("nsis", {"_id": nsir_id})
 274             step = "Getting nsilcmop={} from db".format(nsilcmop_id)
 275             db_nsilcmop = self.db.get_one("nsilcmops", {"_id": nsilcmop_id})
 276
 277             start_deploy = time()
 278             nsi_params = db_nsilcmop.get("operationParams")
 279             if nsi_params and nsi_params.get("timeout_nsi_deploy"):
 280                 timeout_nsi_deploy = nsi_params["timeout_nsi_deploy"]
 281             else:
 282                 timeout_nsi_deploy = self.timeout.get("nsi_deploy", self.timeout_nsi_deploy)
 283
 284             # Empty list to keep track of network service records status in the netslice
 285             nsir_admin = db_nsir_admin = db_nsir.get("_admin")
 286
 287             step = "Creating slice operational-status init"
 288             # Slice status Creating
 289             db_nsir_update["detailed-status"] = "creating"
 290             db_nsir_update["operational-status"] = "init"
 291             db_nsir_update["_admin.nsiState"] = "INSTANTIATED"
 292
 293             step = "Instantiating netslice VLDs before NS instantiation"
 294             # Creating netslice VLDs networking before NS instantiation
 295             db_nsir_update["detailed-status"] = step
 296             self.update_db_2("nsis", nsir_id, db_nsir_update)
 297             db_nsir_update["_admin.deployed.RO"] = db_nsir_admin["deployed"]["RO"]
 298             for vld_item in get_iterable(nsir_admin, "netslice-vld"):
 299                 await netslice_scenario_create(self, vld_item, nsir_id, db_nsir, db_nsir_admin, db_nsir_update)
 300             self.update_db_2("nsis", nsir_id, db_nsir_update)
 301
 302             step = "Instantiating netslice subnets"
 303             db_nsir_update["detailed-status"] = step
 304             self.update_db_2("nsis", nsir_id, db_nsir_update)
 305
 306             db_nsir = self.db.get_one("nsis", {"_id": nsir_id})
 307
 308             # Check status of the VLDs and wait for creation
 309             # netslice_scenarios = db_nsir["_admin"]["deployed"]["RO"]
 310             # db_nsir_update_RO = deepcopy(netslice_scenarios)
 311             # for netslice_scenario in netslice_scenarios:
 312             #    await netslice_scenario_check(self, netslice_scenario["netslice_scenario_id"],
 313             #                                  nsir_id, db_nsir_update_RO)
 314
 315             # db_nsir_update["_admin.deployed.RO"] = db_nsir_update_RO
 316             # self.update_db_2("nsis", nsir_id, db_nsir_update)
 317
 318             # Iterate over the network services operation ids to instantiate NSs
 319             step = "Instantiating Netslice Subnets"
 320             db_nsir = self.db.get_one("nsis", {"_id": nsir_id})
 321             nslcmop_ids = db_nsilcmop["operationParams"].get("nslcmops_ids")
 322             for nslcmop_id in nslcmop_ids:
 323                 nslcmop = self.db.get_one("nslcmops", {"_id": nslcmop_id})
 324                 # Overwriting netslice-vld vim-net-id to ns
 325                 nsr_id, nslcmop = overwrite_nsd_params(self, db_nsir, nslcmop)
 326                 step = "Launching ns={} instantiate={} task".format(nsr_id, nslcmop_id)
 327                 task = asyncio.ensure_future(self.ns.instantiate(nsr_id, nslcmop_id))
 328                 self.lcm_tasks.register("ns", nsr_id, nslcmop_id, "ns_instantiate", task)
 329
 330             # Wait until Network Slice is ready
 331             step = " Waiting nsi ready."
 332             nsrs_detailed_list_old = None
 333             self.logger.debug(logging_text + step)
 334
 335             # For HA, it is checked from database, as the ns operation may be managed by other LCM worker
 336             while time() <= start_deploy + timeout_nsi_deploy:
 337                 # Check ns instantiation status
 338                 nsi_ready = True
 339                 nsir = self.db.get_one("nsis", {"_id": nsir_id})
 340                 nsrs_detailed_list = nsir["_admin"]["nsrs-detailed-list"]
 341                 nsrs_detailed_list_new = []
 342                 for nslcmop_item in nslcmop_ids:
 343                     nslcmop = self.db.get_one("nslcmops", {"_id": nslcmop_item})
 344                     status = nslcmop.get("operationState")
 345                     # TODO: (future improvement) other possible status: ROLLING_BACK,ROLLED_BACK
 346                     for nss in nsrs_detailed_list:
 347                         if nss["nsrId"] == nslcmop["nsInstanceId"]:
 348                             nss.update({"nsrId": nslcmop["nsInstanceId"], "status": nslcmop["operationState"],
 349                                         "detailed-status": nslcmop.get("detailed-status"),
 350                                         "instantiated": True})
 351                             nsrs_detailed_list_new.append(nss)
 352                     if status not in ["COMPLETED", "PARTIALLY_COMPLETED", "FAILED", "FAILED_TEMP"]:
 353                         nsi_ready = False
 354
 355                 if nsrs_detailed_list_new != nsrs_detailed_list_old:
 356                     nsrs_detailed_list_old = nsrs_detailed_list_new
 357                     self.update_db_2("nsis", nsir_id, {"_admin.nsrs-detailed-list": nsrs_detailed_list_new})
 358
 359                 if nsi_ready:
 360                     error_list = []
 361                     step = "Network Slice Instance instantiated"
 362                     for nss in nsrs_detailed_list:
 363                         if nss["status"] in ("FAILED", "FAILED_TEMP"):
 364                             error_list.append("NS {} {}: {}".format(nss["nsrId"], nss["status"],
 365                                                                     nss["detailed-status"]))
 366                     if error_list:
 367                         step = "instantiating"
 368                         raise LcmException("; ".join(error_list))
 369                     break
 370
 371                 # TODO: future improvement due to synchronism -> await asyncio.wait(vca_task_list, timeout=300)
 372                 await asyncio.sleep(5, loop=self.loop)
 373
 374             else:   # timeout_nsi_deploy reached:
 375                 raise LcmException("Timeout waiting nsi to be ready.")
 376
 377             db_nsir_update["operational-status"] = "running"
 378             db_nsir_update["detailed-status"] = "done"
 379             db_nsir_update["config-status"] = "configured"
 380             db_nsilcmop_update["operationState"] = nsilcmop_operation_state = "COMPLETED"
 381             db_nsilcmop_update["statusEnteredTime"] = time()
 382             db_nsilcmop_update["detailed-status"] = "done"
 383             return
 384
 385         except (LcmException, DbException) as e:
 386             self.logger.error(logging_text + "Exit Exception while '{}': {}".format(step, e))
 387             exc = e
 388         except asyncio.CancelledError:
 389             self.logger.error(logging_text + "Cancelled Exception while '{}'".format(step))
 390             exc = "Operation was cancelled"
 391         except Exception as e:
 392             exc = traceback.format_exc()
 393             self.logger.critical(logging_text + "Exit Exception {} while '{}': {}".format(type(e).__name__, step, e),
 394                                  exc_info=True)
 395         finally:
 396             if exc:
 397                 if db_nsir:
 398                     db_nsir_update["detailed-status"] = "ERROR {}: {}".format(step, exc)
 399                     db_nsir_update["operational-status"] = "failed"
 400                     db_nsir_update["config-status"] = "configured"
 401                 if db_nsilcmop:
 402                     db_nsilcmop_update["detailed-status"] = "FAILED {}: {}".format(step, exc)
 403                     db_nsilcmop_update["operationState"] = nsilcmop_operation_state = "FAILED"
 404                     db_nsilcmop_update["statusEnteredTime"] = time()
 405             try:
 406                 if db_nsir:
 407                     db_nsir_update["_admin.nsilcmop"] = None
 408                     self.update_db_2("nsis", nsir_id, db_nsir_update)
 409                 if db_nsilcmop:
 410                     self.update_db_2("nsilcmops", nsilcmop_id, db_nsilcmop_update)
 411             except DbException as e:
 412                 self.logger.error(logging_text + "Cannot update database: {}".format(e))
 413             if nsilcmop_operation_state:
 414                 try:
 415                     await self.msg.aiowrite("nsi", "instantiated", {"nsir_id": nsir_id, "nsilcmop_id": nsilcmop_id,
 416                                                                     "operationState": nsilcmop_operation_state})
 417                 except Exception as e:
 418                     self.logger.error(logging_text + "kafka_write notification Exception {}".format(e))
 419             self.logger.debug(logging_text + "Exit")
 420             self.lcm_tasks.remove("nsi", nsir_id, nsilcmop_id, "nsi_instantiate")
 421
 422     async def terminate(self, nsir_id, nsilcmop_id):
 423
 424         # Try to lock HA task here
 425         task_is_locked_by_me = self.lcm_tasks.lock_HA('nsi', 'nsilcmops', nsilcmop_id)
 426         if not task_is_locked_by_me:
 427             return
 428
 429         logging_text = "Task nsi={} terminate={} ".format(nsir_id, nsilcmop_id)
 430         self.logger.debug(logging_text + "Enter")
 431         exc = None
 432         db_nsir = None
 433         db_nsilcmop = None
 434         db_nsir_update = {"_admin.nsilcmop": nsilcmop_id}
 435         db_nsilcmop_update = {}
 436         RO = ROclient.ROClient(self.loop, **self.ro_config)
 437         nsir_deployed = None
 438         failed_detail = []   # annotates all failed error messages
 439         nsilcmop_operation_state = None
 440         autoremove = False  # autoremove after terminated
 441         try:
 442             # wait for any previous tasks in process
 443             await self.lcm_tasks.waitfor_related_HA('nsi', 'nsilcmops', nsilcmop_id)
 444
 445             step = "Getting nsir={} from db".format(nsir_id)
 446             db_nsir = self.db.get_one("nsis", {"_id": nsir_id})
 447             nsir_deployed = deepcopy(db_nsir["_admin"].get("deployed"))
 448             step = "Getting nsilcmop={} from db".format(nsilcmop_id)
 449             db_nsilcmop = self.db.get_one("nsilcmops", {"_id": nsilcmop_id})
 450
 451             # TODO: Check if makes sense check the nsiState=NOT_INSTANTIATED when terminate
 452             # CASE: Instance was terminated but there is a second request to terminate the instance
 453             if db_nsir["_admin"]["nsiState"] == "NOT_INSTANTIATED":
 454                 return
 455
 456             # Slice status Terminating
 457             db_nsir_update["operational-status"] = "terminating"
 458             db_nsir_update["config-status"] = "terminating"
 459             db_nsir_update["detailed-status"] = "Terminating Netslice subnets"
 460             self.update_db_2("nsis", nsir_id, db_nsir_update)
 461
 462             # Gets the list to keep track of network service records status in the netslice
 463             nsrs_detailed_list = []
 464
 465             # Iterate over the network services operation ids to terminate NSs
 466             # TODO: (future improvement) look another way check the tasks instead of keep asking
 467             # -> https://docs.python.org/3/library/asyncio-task.html#waiting-primitives
 468             # steps: declare ns_tasks, add task when terminate is called, await asyncio.wait(vca_task_list, timeout=300)
 469             step = "Terminating Netslice Subnets"
 470             nslcmop_ids = db_nsilcmop["operationParams"].get("nslcmops_ids")
 471             nslcmop_new = []
 472             for nslcmop_id in nslcmop_ids:
 473                 nslcmop = self.db.get_one("nslcmops", {"_id": nslcmop_id})
 474                 nsr_id = nslcmop["operationParams"].get("nsInstanceId")
 475                 nss_in_use = self.db.get_list("nsis", {"_admin.netslice-vld.ANYINDEX.shared-nsrs-list": nsr_id,
 476                                                        "operational-status": {"$nin": ["terminated", "failed"]}})
 477                 if len(nss_in_use) < 2:
 478                     task = asyncio.ensure_future(self.ns.terminate(nsr_id, nslcmop_id))
 479                     self.lcm_tasks.register("ns", nsr_id, nslcmop_id, "ns_instantiate", task)
 480                     nslcmop_new.append(nslcmop_id)
 481                 else:
 482                     # Update shared nslcmop shared with active nsi
 483                     netsliceInstanceId = db_nsir["_id"]
 484                     for nsis_item in nss_in_use:
 485                         if db_nsir["_id"] != nsis_item["_id"]:
 486                             netsliceInstanceId = nsis_item["_id"]
 487                             break
 488                     self.db.set_one("nslcmops", {"_id": nslcmop_id},
 489                                     {"operationParams.netsliceInstanceId": netsliceInstanceId})
 490             self.db.set_one("nsilcmops", {"_id": nsilcmop_id}, {"operationParams.nslcmops_ids": nslcmop_new})
 491
 492             # Wait until Network Slice is terminated
 493             step = nsir_status_detailed = " Waiting nsi terminated. nsi_id={}".format(nsir_id)
 494             nsrs_detailed_list_old = None
 495             self.logger.debug(logging_text + step)
 496
 497             termination_timeout = 2 * 3600   # Two hours
 498             while termination_timeout > 0:
 499                 # Check ns termination status
 500                 nsi_ready = True
 501                 db_nsir = self.db.get_one("nsis", {"_id": nsir_id})
 502                 nsrs_detailed_list = db_nsir["_admin"].get("nsrs-detailed-list")
 503                 nsrs_detailed_list_new = []
 504                 for nslcmop_item in nslcmop_ids:
 505                     nslcmop = self.db.get_one("nslcmops", {"_id": nslcmop_item})
 506                     status = nslcmop["operationState"]
 507                     # TODO: (future improvement) other possible status: ROLLING_BACK,ROLLED_BACK
 508                     for nss in nsrs_detailed_list:
 509                         if nss["nsrId"] == nslcmop["nsInstanceId"]:
 510                             nss.update({"nsrId": nslcmop["nsInstanceId"], "status": nslcmop["operationState"],
 511                                         "detailed-status":
 512                                         nsir_status_detailed + "; {}".format(nslcmop.get("detailed-status"))})
 513                             nsrs_detailed_list_new.append(nss)
 514                     if status not in ["COMPLETED", "PARTIALLY_COMPLETED", "FAILED", "FAILED_TEMP"]:
 515                         nsi_ready = False
 516
 517                 if nsrs_detailed_list_new != nsrs_detailed_list_old:
 518                     nsrs_detailed_list_old = nsrs_detailed_list_new
 519                     self.update_db_2("nsis", nsir_id, {"_admin.nsrs-detailed-list": nsrs_detailed_list_new})
 520
 521                 if nsi_ready:
 522                     # Check if it is the last used nss and mark isinstantiate: False
 523                     db_nsir = self.db.get_one("nsis", {"_id": nsir_id})
 524                     nsrs_detailed_list = db_nsir["_admin"].get("nsrs-detailed-list")
 525                     for nss in nsrs_detailed_list:
 526                         _filter = {"_admin.nsrs-detailed-list.ANYINDEX.nsrId": nss["nsrId"],
 527                                    "operational-status.ne": "terminated",
 528                                    "_id.ne": nsir_id}
 529                         nsis_list = self.db.get_one("nsis", _filter, fail_on_empty=False, fail_on_more=False)
 530                         if not nsis_list:
 531                             nss.update({"instantiated": False})
 532
 533                     step = "Network Slice Instance is terminated. nsi_id={}".format(nsir_id)
 534                     for items in nsrs_detailed_list:
 535                         if "FAILED" in items.values():
 536                             raise LcmException("Error terminating NSI: {}".format(nsir_id))
 537                     break
 538
 539                 await asyncio.sleep(5, loop=self.loop)
 540                 termination_timeout -= 5
 541
 542             if termination_timeout <= 0:
 543                 raise LcmException("Timeout waiting nsi to be terminated. nsi_id={}".format(nsir_id))
 544
 545             # Delete netslice-vlds
 546             RO_nsir_id = RO_delete_action = None
 547             for nsir_deployed_RO in get_iterable(nsir_deployed, "RO"):
 548                 RO_nsir_id = nsir_deployed_RO.get("netslice_scenario_id")
 549                 try:
 550                     step = db_nsir_update["detailed-status"] = "Deleting netslice-vld at RO"
 551                     db_nsilcmop_update["detailed-status"] = "Deleting netslice-vld at RO"
 552                     self.logger.debug(logging_text + step)
 553                     desc = await RO.delete("ns", RO_nsir_id)
 554                     RO_delete_action = desc["action_id"]
 555                     nsir_deployed_RO["vld_delete_action_id"] = RO_delete_action
 556                     nsir_deployed_RO["vld_status"] = "DELETING"
 557                     db_nsir_update["_admin.deployed"] = nsir_deployed
 558                     self.update_db_2("nsis", nsir_id, db_nsir_update)
 559                     if RO_delete_action:
 560                         # wait until NS is deleted from VIM
 561                         step = "Waiting ns deleted from VIM. RO_id={}".format(RO_nsir_id)
 562                         self.logger.debug(logging_text + step)
 563                 except ROclient.ROClientException as e:
 564                     if e.http_code == 404:  # not found
 565                         nsir_deployed_RO["vld_id"] = None
 566                         nsir_deployed_RO["vld_status"] = "DELETED"
 567                         self.logger.debug(logging_text + "RO_ns_id={} already deleted".format(RO_nsir_id))
 568                     elif e.http_code == 409:   # conflict
 569                         failed_detail.append("RO_ns_id={} delete conflict: {}".format(RO_nsir_id, e))
 570                         self.logger.debug(logging_text + failed_detail[-1])
 571                     else:
 572                         failed_detail.append("RO_ns_id={} delete error: {}".format(RO_nsir_id, e))
 573                         self.logger.error(logging_text + failed_detail[-1])
 574
 575                 if failed_detail:
 576                     self.logger.error(logging_text + " ;".join(failed_detail))
 577                     db_nsir_update["operational-status"] = "failed"
 578                     db_nsir_update["detailed-status"] = "Deletion errors " + "; ".join(failed_detail)
 579                     db_nsilcmop_update["detailed-status"] = "; ".join(failed_detail)
 580                     db_nsilcmop_update["operationState"] = nsilcmop_operation_state = "FAILED"
 581                     db_nsilcmop_update["statusEnteredTime"] = time()
 582                 else:
 583                     db_nsir_update["operational-status"] = "terminating"
 584                     db_nsir_update["config-status"] = "terminating"
 585                     db_nsir_update["_admin.nsiState"] = "NOT_INSTANTIATED"
 586                     db_nsilcmop_update["operationState"] = nsilcmop_operation_state = "COMPLETED"
 587                     db_nsilcmop_update["statusEnteredTime"] = time()
 588                     if db_nsilcmop["operationParams"].get("autoremove"):
 589                         autoremove = True
 590
 591             db_nsir_update["detailed-status"] = "done"
 592             db_nsir_update["operational-status"] = "terminated"
 593             db_nsir_update["config-status"] = "terminated"
 594             db_nsilcmop_update["statusEnteredTime"] = time()
 595             db_nsilcmop_update["detailed-status"] = "done"
 596             return
 597
 598         except (LcmException, DbException) as e:
 599             self.logger.error(logging_text + "Exit Exception while '{}': {}".format(step, e))
 600             exc = e
 601         except asyncio.CancelledError:
 602             self.logger.error(logging_text + "Cancelled Exception while '{}'".format(step))
 603             exc = "Operation was cancelled"
 604         except Exception as e:
 605             exc = traceback.format_exc()
 606             self.logger.critical(logging_text + "Exit Exception {} while '{}': {}".format(type(e).__name__, step, e),
 607                                  exc_info=True)
 608         finally:
 609             if exc:
 610                 if db_nsir:
 611                     db_nsir_update["_admin.deployed"] = nsir_deployed
 612                     db_nsir_update["detailed-status"] = "ERROR {}: {}".format(step, exc)
 613                     db_nsir_update["operational-status"] = "failed"
 614                 if db_nsilcmop:
 615                     db_nsilcmop_update["detailed-status"] = "FAILED {}: {}".format(step, exc)
 616                     db_nsilcmop_update["operationState"] = nsilcmop_operation_state = "FAILED"
 617                     db_nsilcmop_update["statusEnteredTime"] = time()
 618             try:
 619                 if db_nsir:
 620                     db_nsir_update["_admin.deployed"] = nsir_deployed
 621                     db_nsir_update["_admin.nsilcmop"] = None
 622                     self.update_db_2("nsis", nsir_id, db_nsir_update)
 623                 if db_nsilcmop:
 624                     self.update_db_2("nsilcmops", nsilcmop_id, db_nsilcmop_update)
 625             except DbException as e:
 626                 self.logger.error(logging_text + "Cannot update database: {}".format(e))
 627
 628             if nsilcmop_operation_state:
 629                 try:
 630                     await self.msg.aiowrite("nsi", "terminated", {"nsir_id": nsir_id, "nsilcmop_id": nsilcmop_id,
 631                                                                   "operationState": nsilcmop_operation_state,
 632                                                                   "autoremove": autoremove},
 633                                             loop=self.loop)
 634                 except Exception as e:
 635                     self.logger.error(logging_text + "kafka_write notification Exception {}".format(e))
 636             self.logger.debug(logging_text + "Exit")
 637             self.lcm_tasks.remove("nsi", nsir_id, nsilcmop_id, "nsi_terminate")