NG-RO/osm_ng_ro/ns.py

   1 # -*- coding: utf-8 -*-
   2
   3 ##
   4 # Copyright 2020 Telefonica Investigacion y Desarrollo, S.A.U.
   5 # Licensed under the Apache License, Version 2.0 (the "License");
   6 # you may not use this file except in compliance with the License.
   7 # You may obtain a copy of the License at
   8 #
   9 #    http://www.apache.org/licenses/LICENSE-2.0
  10 #
  11 # Unless required by applicable law or agreed to in writing, software
  12 # distributed under the License is distributed on an "AS IS" BASIS,
  13 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
  14 # implied.
  15 # See the License for the specific language governing permissions and
  16 # limitations under the License.
  17 ##
  18
  19 import logging
  20 # import yaml
  21 from traceback import format_exc as traceback_format_exc
  22 from osm_ng_ro.ns_thread import NsWorker, NsWorkerException, deep_get
  23 from osm_ng_ro.validation import validate_input, deploy_schema
  24 from osm_common import dbmongo, dbmemory, fslocal, fsmongo, msglocal, msgkafka, version as common_version
  25 from osm_common.dbbase import DbException
  26 from osm_common.fsbase import FsException
  27 from osm_common.msgbase import MsgException
  28 from http import HTTPStatus
  29 from uuid import uuid4
  30 from threading import Lock
  31 from random import choice as random_choice
  32 from time import time
  33 from jinja2 import Environment, TemplateError, TemplateNotFound, StrictUndefined, UndefinedError
  34 from cryptography.hazmat.primitives import serialization as crypto_serialization
  35 from cryptography.hazmat.primitives.asymmetric import rsa
  36 from cryptography.hazmat.backends import default_backend as crypto_default_backend
  37
  38 __author__ = "Alfonso Tierno <alfonso.tiernosepulveda@telefonica.com>"
  39 min_common_version = "0.1.16"
  40
  41
  42 class NsException(Exception):
  43
  44     def __init__(self, message, http_code=HTTPStatus.BAD_REQUEST):
  45         self.http_code = http_code
  46         super(Exception, self).__init__(message)
  47
  48
  49 def get_process_id():
  50     """
  51     Obtain a unique ID for this process. If running from inside docker, it will get docker ID. If not it
  52     will provide a random one
  53     :return: Obtained ID
  54     """
  55     # Try getting docker id. If fails, get pid
  56     try:
  57         with open("/proc/self/cgroup", "r") as f:
  58             text_id_ = f.readline()
  59             _, _, text_id = text_id_.rpartition("/")
  60             text_id = text_id.replace("\n", "")[:12]
  61             if text_id:
  62                 return text_id
  63     except Exception:
  64         pass
  65     # Return a random id
  66     return "".join(random_choice("0123456789abcdef") for _ in range(12))
  67
  68
  69 def versiontuple(v):
  70     """utility for compare dot separate versions. Fills with zeros to proper number comparison"""
  71     filled = []
  72     for point in v.split("."):
  73         filled.append(point.zfill(8))
  74     return tuple(filled)
  75
  76
  77 class Ns(object):
  78
  79     def __init__(self):
  80         self.db = None
  81         self.fs = None
  82         self.msg = None
  83         self.config = None
  84         # self.operations = None
  85         self.logger = None
  86         # ^ Getting logger inside method self.start because parent logger (ro) is not available yet.
  87         # If done now it will not be linked to parent not getting its handler and level
  88         self.map_topic = {}
  89         self.write_lock = None
  90         self.assignment = {}
  91         self.assignment_list = []
  92         self.next_worker = 0
  93         self.plugins = {}
  94         self.workers = []
  95
  96     def init_db(self, target_version):
  97         pass
  98
  99     def start(self, config):
 100         """
 101         Connect to database, filesystem storage, and messaging
 102         :param config: two level dictionary with configuration. Top level should contain 'database', 'storage',
 103         :param config: Configuration of db, storage, etc
 104         :return: None
 105         """
 106         self.config = config
 107         self.config["process_id"] = get_process_id()  # used for HA identity
 108         self.logger = logging.getLogger("ro.ns")
 109         # check right version of common
 110         if versiontuple(common_version) < versiontuple(min_common_version):
 111             raise NsException("Not compatible osm/common version '{}'. Needed '{}' or higher".format(
 112                 common_version, min_common_version))
 113
 114         try:
 115             if not self.db:
 116                 if config["database"]["driver"] == "mongo":
 117                     self.db = dbmongo.DbMongo()
 118                     self.db.db_connect(config["database"])
 119                 elif config["database"]["driver"] == "memory":
 120                     self.db = dbmemory.DbMemory()
 121                     self.db.db_connect(config["database"])
 122                 else:
 123                     raise NsException("Invalid configuration param '{}' at '[database]':'driver'".format(
 124                         config["database"]["driver"]))
 125             if not self.fs:
 126                 if config["storage"]["driver"] == "local":
 127                     self.fs = fslocal.FsLocal()
 128                     self.fs.fs_connect(config["storage"])
 129                 elif config["storage"]["driver"] == "mongo":
 130                     self.fs = fsmongo.FsMongo()
 131                     self.fs.fs_connect(config["storage"])
 132                 elif config["storage"]["driver"] is None:
 133                     pass
 134                 else:
 135                     raise NsException("Invalid configuration param '{}' at '[storage]':'driver'".format(
 136                         config["storage"]["driver"]))
 137             if not self.msg:
 138                 if config["message"]["driver"] == "local":
 139                     self.msg = msglocal.MsgLocal()
 140                     self.msg.connect(config["message"])
 141                 elif config["message"]["driver"] == "kafka":
 142                     self.msg = msgkafka.MsgKafka()
 143                     self.msg.connect(config["message"])
 144                 else:
 145                     raise NsException("Invalid configuration param '{}' at '[message]':'driver'".format(
 146                         config["message"]["driver"]))
 147
 148             # TODO load workers to deal with exising database tasks
 149
 150             self.write_lock = Lock()
 151         except (DbException, FsException, MsgException) as e:
 152             raise NsException(str(e), http_code=e.http_code)
 153
 154     def stop(self):
 155         try:
 156             if self.db:
 157                 self.db.db_disconnect()
 158             if self.fs:
 159                 self.fs.fs_disconnect()
 160             if self.msg:
 161                 self.msg.disconnect()
 162             self.write_lock = None
 163         except (DbException, FsException, MsgException) as e:
 164             raise NsException(str(e), http_code=e.http_code)
 165         for worker in self.workers:
 166             worker.insert_task(("terminate",))
 167
 168     def _create_worker(self, target_id, load=True):
 169         # Look for a thread not alive
 170         worker_id = next((i for i in range(len(self.workers)) if not self.workers[i].is_alive()), None)
 171         if worker_id:
 172             # re-start worker
 173             self.workers[worker_id].start()
 174         else:
 175             worker_id = len(self.workers)
 176             if worker_id < self.config["global"]["server.ns_threads"]:
 177                 # create a new worker
 178                 self.workers.append(NsWorker(worker_id, self.config, self.plugins, self.db))
 179                 self.workers[worker_id].start()
 180             else:
 181                 # reached maximum number of threads, assign VIM to an existing one
 182                 worker_id = self.next_worker
 183                 self.next_worker = (self.next_worker + 1) % self.config["global"]["server.ns_threads"]
 184         if load:
 185             self.workers[worker_id].insert_task(("load_vim", target_id))
 186         return worker_id
 187
 188     def assign_vim(self, target_id):
 189         if target_id not in self.assignment:
 190             self.assignment[target_id] = self._create_worker(target_id)
 191             self.assignment_list.append(target_id)
 192
 193     def reload_vim(self, target_id):
 194         # send reload_vim to the thread working with this VIM and inform all that a VIM has been changed,
 195         # this is because database VIM information is cached for threads working with SDN
 196         # if target_id in self.assignment:
 197         #     worker_id = self.assignment[target_id]
 198         #     self.workers[worker_id].insert_task(("reload_vim", target_id))
 199         for worker in self.workers:
 200             if worker.is_alive():
 201                 worker.insert_task(("reload_vim", target_id))
 202
 203     def unload_vim(self, target_id):
 204         if target_id in self.assignment:
 205             worker_id = self.assignment[target_id]
 206             self.workers[worker_id].insert_task(("unload_vim", target_id))
 207             del self.assignment[target_id]
 208             self.assignment_list.remove(target_id)
 209
 210     def check_vim(self, target_id):
 211         if target_id in self.assignment:
 212             worker_id = self.assignment[target_id]
 213         else:
 214             worker_id = self._create_worker(target_id, load=False)
 215
 216         worker = self.workers[worker_id]
 217         worker.insert_task(("check_vim", target_id))
 218
 219     def _get_cloud_init(self, where):
 220         """
 221
 222         :param where: can be 'vnfr_id:file:file_name' or 'vnfr_id:vdu:vdu_idex'
 223         :return:
 224         """
 225         vnfd_id, _, other = where.partition(":")
 226         _type, _, name = other.partition(":")
 227         vnfd = self.db.get_one("vnfds", {"_id": vnfd_id})
 228         if _type == "file":
 229             base_folder = vnfd["_admin"]["storage"]
 230             cloud_init_file = "{}/{}/cloud_init/{}".format(base_folder["folder"], base_folder["pkg-dir"], name)
 231             if not self.fs:
 232                 raise NsException("Cannot read file '{}'. Filesystem not loaded, change configuration at storage.driver"
 233                                   .format(cloud_init_file))
 234             with self.fs.file_open(cloud_init_file, "r") as ci_file:
 235                 cloud_init_content = ci_file.read()
 236         elif _type == "vdu":
 237             cloud_init_content = vnfd["vdu"][int(name)]["cloud-init"]
 238         else:
 239             raise NsException("Mismatch descriptor for cloud init: {}".format(where))
 240         return cloud_init_content
 241
 242     def _parse_jinja2(self, cloud_init_content, params, context):
 243
 244         try:
 245             env = Environment(undefined=StrictUndefined)
 246             template = env.from_string(cloud_init_content)
 247             return template.render(params or {})
 248         except UndefinedError as e:
 249             raise NsException(
 250                 "Variable '{}' defined at vnfd='{}' must be provided in the instantiation parameters"
 251                 "inside the 'additionalParamsForVnf' block".format(e, context))
 252         except (TemplateError, TemplateNotFound) as e:
 253             raise NsException("Error parsing Jinja2 to cloud-init content at vnfd='{}': {}".format(context, e))
 254
 255     def _create_db_ro_nsrs(self, nsr_id, now):
 256         try:
 257             key = rsa.generate_private_key(
 258                 backend=crypto_default_backend(),
 259                 public_exponent=65537,
 260                 key_size=2048
 261             )
 262             private_key = key.private_bytes(
 263                 crypto_serialization.Encoding.PEM,
 264                 crypto_serialization.PrivateFormat.PKCS8,
 265                 crypto_serialization.NoEncryption())
 266             public_key = key.public_key().public_bytes(
 267                 crypto_serialization.Encoding.OpenSSH,
 268                 crypto_serialization.PublicFormat.OpenSSH
 269             )
 270             private_key = private_key.decode('utf8')
 271             # Change first line because Paramiko needs a explicit start with 'BEGIN RSA PRIVATE KEY'
 272             i = private_key.find("\n")
 273             private_key = "-----BEGIN RSA PRIVATE KEY-----" + private_key[i:]
 274             public_key = public_key.decode('utf8')
 275         except Exception as e:
 276             raise NsException("Cannot create ssh-keys: {}".format(e))
 277
 278         schema_version = "1.1"
 279         private_key_encrypted = self.db.encrypt(private_key, schema_version=schema_version, salt=nsr_id)
 280         db_content = {
 281             "_id": nsr_id,
 282             "_admin": {
 283                 "created": now,
 284                 "modified": now,
 285                 "schema_version": schema_version
 286             },
 287             "public_key": public_key,
 288             "private_key": private_key_encrypted,
 289             "actions": [],
 290         }
 291         self.db.create("ro_nsrs", db_content)
 292         return db_content
 293
 294     def deploy(self, session, indata, version, nsr_id, *args, **kwargs):
 295         self.logger.debug("ns.deploy nsr_id={} indata={}".format(nsr_id, indata))
 296         validate_input(indata, deploy_schema)
 297         action_id = indata.get("action_id", str(uuid4()))
 298         task_index = 0
 299         # get current deployment
 300         db_nsr_update = {}        # update operation on nsrs
 301         db_vnfrs_update = {}
 302         db_vnfrs = {}     # vnf's info indexed by _id
 303         nb_ro_tasks = 0  # for logging
 304         vdu2cloud_init = indata.get("cloud_init_content") or {}
 305         step = ''
 306         logging_text = "Task deploy nsr_id={} action_id={} ".format(nsr_id, action_id)
 307         self.logger.debug(logging_text + "Enter")
 308         try:
 309             step = "Getting ns and vnfr record from db"
 310             db_nsr = self.db.get_one("nsrs", {"_id": nsr_id})
 311             db_new_tasks = []
 312             tasks_by_target_record_id = {}
 313             # read from db: vnf's of this ns
 314             step = "Getting vnfrs from db"
 315             db_vnfrs_list = self.db.get_list("vnfrs", {"nsr-id-ref": nsr_id})
 316             if not db_vnfrs_list:
 317                 raise NsException("Cannot obtain associated VNF for ns")
 318             for vnfr in db_vnfrs_list:
 319                 db_vnfrs[vnfr["_id"]] = vnfr
 320                 db_vnfrs_update[vnfr["_id"]] = {}
 321             now = time()
 322             db_ro_nsr = self.db.get_one("ro_nsrs", {"_id": nsr_id}, fail_on_empty=False)
 323             if not db_ro_nsr:
 324                 db_ro_nsr = self._create_db_ro_nsrs(nsr_id, now)
 325             ro_nsr_public_key = db_ro_nsr["public_key"]
 326
 327             # check that action_id is not in the list of actions. Suffixed with :index
 328             if action_id in db_ro_nsr["actions"]:
 329                 index = 1
 330                 while True:
 331                     new_action_id = "{}:{}".format(action_id, index)
 332                     if new_action_id not in db_ro_nsr["actions"]:
 333                         action_id = new_action_id
 334                         self.logger.debug(logging_text + "Changing action_id in use to {}".format(action_id))
 335                         break
 336                     index += 1
 337
 338             def _create_task(target_id, item, action, target_record, target_record_id, extra_dict=None):
 339                 nonlocal task_index
 340                 nonlocal action_id
 341                 nonlocal nsr_id
 342
 343                 task = {
 344                     "target_id": target_id,  # it will be removed before pushing at database
 345                     "action_id": action_id,
 346                     "nsr_id": nsr_id,
 347                     "task_id": "{}:{}".format(action_id, task_index),
 348                     "status": "SCHEDULED",
 349                     "action": action,
 350                     "item": item,
 351                     "target_record": target_record,
 352                     "target_record_id": target_record_id,
 353                 }
 354                 if extra_dict:
 355                     task.update(extra_dict)   # params, find_params, depends_on
 356                 task_index += 1
 357                 return task
 358
 359             def _create_ro_task(target_id, task):
 360                 nonlocal action_id
 361                 nonlocal task_index
 362                 nonlocal now
 363
 364                 _id = task["task_id"]
 365                 db_ro_task = {
 366                     "_id": _id,
 367                     "locked_by": None,
 368                     "locked_at": 0.0,
 369                     "target_id": target_id,
 370                     "vim_info": {
 371                         "created": False,
 372                         "created_items": None,
 373                         "vim_id": None,
 374                         "vim_name": None,
 375                         "vim_status": None,
 376                         "vim_details": None,
 377                         "refresh_at": None,
 378                     },
 379                     "modified_at": now,
 380                     "created_at": now,
 381                     "to_check_at": now,
 382                     "tasks": [task],
 383                 }
 384                 return db_ro_task
 385
 386             def _process_image_params(target_image, vim_info, target_record_id):
 387                 find_params = {}
 388                 if target_image.get("image"):
 389                     find_params["filter_dict"] = {"name": target_image.get("image")}
 390                 if target_image.get("vim_image_id"):
 391                     find_params["filter_dict"] = {"id": target_image.get("vim_image_id")}
 392                 if target_image.get("image_checksum"):
 393                     find_params["filter_dict"] = {"checksum": target_image.get("image_checksum")}
 394                 return {"find_params": find_params}
 395
 396             def _process_flavor_params(target_flavor, vim_info, target_record_id):
 397
 398                 def _get_resource_allocation_params(quota_descriptor):
 399                     """
 400                     read the quota_descriptor from vnfd and fetch the resource allocation properties from the
 401                      descriptor object
 402                     :param quota_descriptor: cpu/mem/vif/disk-io quota descriptor
 403                     :return: quota params for limit, reserve, shares from the descriptor object
 404                     """
 405                     quota = {}
 406                     if quota_descriptor.get("limit"):
 407                         quota["limit"] = int(quota_descriptor["limit"])
 408                     if quota_descriptor.get("reserve"):
 409                         quota["reserve"] = int(quota_descriptor["reserve"])
 410                     if quota_descriptor.get("shares"):
 411                         quota["shares"] = int(quota_descriptor["shares"])
 412                     return quota
 413
 414                 flavor_data = {
 415                     "disk": int(target_flavor["storage-gb"]),
 416                     "ram": int(target_flavor["memory-mb"]),
 417                     "vcpus": int(target_flavor["vcpu-count"]),
 418                 }
 419                 numa = {}
 420                 extended = {}
 421                 if target_flavor.get("guest-epa"):
 422                     extended = {}
 423                     epa_vcpu_set = False
 424                     if target_flavor["guest-epa"].get("numa-node-policy"):
 425                         numa_node_policy = target_flavor["guest-epa"].get("numa-node-policy")
 426                         if numa_node_policy.get("node"):
 427                             numa_node = numa_node_policy["node"][0]
 428                             if numa_node.get("num-cores"):
 429                                 numa["cores"] = numa_node["num-cores"]
 430                                 epa_vcpu_set = True
 431                             if numa_node.get("paired-threads"):
 432                                 if numa_node["paired-threads"].get("num-paired-threads"):
 433                                     numa["paired-threads"] = int(numa_node["paired-threads"]["num-paired-threads"])
 434                                     epa_vcpu_set = True
 435                                 if len(numa_node["paired-threads"].get("paired-thread-ids")):
 436                                     numa["paired-threads-id"] = []
 437                                     for pair in numa_node["paired-threads"]["paired-thread-ids"]:
 438                                         numa["paired-threads-id"].append(
 439                                             (str(pair["thread-a"]), str(pair["thread-b"]))
 440                                         )
 441                             if numa_node.get("num-threads"):
 442                                 numa["threads"] = int(numa_node["num-threads"])
 443                                 epa_vcpu_set = True
 444                             if numa_node.get("memory-mb"):
 445                                 numa["memory"] = max(int(numa_node["memory-mb"] / 1024), 1)
 446                     if target_flavor["guest-epa"].get("mempage-size"):
 447                         extended["mempage-size"] = target_flavor["guest-epa"].get("mempage-size")
 448                     if target_flavor["guest-epa"].get("cpu-pinning-policy") and not epa_vcpu_set:
 449                         if target_flavor["guest-epa"]["cpu-pinning-policy"] == "DEDICATED":
 450                             if target_flavor["guest-epa"].get("cpu-thread-pinning-policy") and \
 451                                     target_flavor["guest-epa"]["cpu-thread-pinning-policy"] != "PREFER":
 452                                 numa["cores"] = max(flavor_data["vcpus"], 1)
 453                             else:
 454                                 numa["threads"] = max(flavor_data["vcpus"], 1)
 455                             epa_vcpu_set = True
 456                     if target_flavor["guest-epa"].get("cpu-quota") and not epa_vcpu_set:
 457                         cpuquota = _get_resource_allocation_params(target_flavor["guest-epa"].get("cpu-quota"))
 458                         if cpuquota:
 459                             extended["cpu-quota"] = cpuquota
 460                     if target_flavor["guest-epa"].get("mem-quota"):
 461                         vduquota = _get_resource_allocation_params(target_flavor["guest-epa"].get("mem-quota"))
 462                         if vduquota:
 463                             extended["mem-quota"] = vduquota
 464                     if target_flavor["guest-epa"].get("disk-io-quota"):
 465                         diskioquota = _get_resource_allocation_params(target_flavor["guest-epa"].get("disk-io-quota"))
 466                         if diskioquota:
 467                             extended["disk-io-quota"] = diskioquota
 468                     if target_flavor["guest-epa"].get("vif-quota"):
 469                         vifquota = _get_resource_allocation_params(target_flavor["guest-epa"].get("vif-quota"))
 470                         if vifquota:
 471                             extended["vif-quota"] = vifquota
 472                 if numa:
 473                     extended["numas"] = [numa]
 474                 if extended:
 475                     flavor_data["extended"] = extended
 476
 477                 extra_dict = {"find_params": {"flavor_data": flavor_data}}
 478                 flavor_data_name = flavor_data.copy()
 479                 flavor_data_name["name"] = target_flavor["name"]
 480                 extra_dict["params"] = {"flavor_data": flavor_data_name}
 481                 return extra_dict
 482
 483             def _ip_profile_2_ro(ip_profile):
 484                 if not ip_profile:
 485                     return None
 486                 ro_ip_profile = {
 487                     "ip_version": "IPv4" if "v4" in ip_profile.get("ip-version", "ipv4") else "IPv6",
 488                     "subnet_address": ip_profile.get("subnet-address"),
 489                     "gateway_address": ip_profile.get("gateway-address"),
 490                     "dhcp_enabled": ip_profile["dhcp-params"].get("enabled", True),
 491                     "dhcp_start_address": ip_profile["dhcp-params"].get("start-address"),
 492                     "dhcp_count": ip_profile["dhcp-params"].get("count"),
 493
 494                 }
 495                 if ip_profile.get("dns-server"):
 496                     ro_ip_profile["dns_address"] = ";".join([v["address"] for v in ip_profile["dns-server"]])
 497                 if ip_profile.get('security-group'):
 498                     ro_ip_profile["security_group"] = ip_profile['security-group']
 499                 return ro_ip_profile
 500
 501             def _process_net_params(target_vld, vim_info, target_record_id):
 502                 nonlocal indata
 503                 extra_dict = {}
 504
 505                 if vim_info.get("sdn"):
 506                     # vnf_preffix = "vnfrs:{}".format(vnfr_id)
 507                     # ns_preffix = "nsrs:{}".format(nsr_id)
 508                     vld_target_record_id, _, _ = target_record_id.rpartition(".")  # remove the ending ".sdn
 509                     extra_dict["params"] = {k: vim_info[k] for k in ("sdn-ports", "target_vim", "vlds", "type")
 510                                             if vim_info.get(k)}
 511                     # TODO needed to add target_id in the dependency.
 512                     if vim_info.get("target_vim"):
 513                         extra_dict["depends_on"] = [vim_info.get("target_vim") + " " + vld_target_record_id]
 514                     return extra_dict
 515
 516                 if vim_info.get("vim_network_name"):
 517                     extra_dict["find_params"] = {"filter_dict": {"name": vim_info.get("vim_network_name")}}
 518                 elif vim_info.get("vim_network_id"):
 519                     extra_dict["find_params"] = {"filter_dict": {"id": vim_info.get("vim_network_id")}}
 520                 elif target_vld.get("mgmt-network"):
 521                     extra_dict["find_params"] = {"mgmt": True, "name": target_vld["id"]}
 522                 else:
 523                     # create
 524                     extra_dict["params"] = {
 525                         "net_name": "{}-{}".format(indata["name"][:16], target_vld.get("name", target_vld["id"])[:16]),
 526                         "ip_profile": _ip_profile_2_ro(vim_info.get('ip_profile')),
 527                         "provider_network_profile": vim_info.get('provider_network'),
 528                     }
 529                     if not target_vld.get("underlay"):
 530                         extra_dict["params"]["net_type"] = "bridge"
 531                     else:
 532                         extra_dict["params"]["net_type"] = "ptp" if target_vld.get("type") == "ELINE" else "data"
 533                 return extra_dict
 534
 535             def _process_vdu_params(target_vdu, vim_info, target_record_id):
 536                 nonlocal vnfr_id
 537                 nonlocal nsr_id
 538                 nonlocal indata
 539                 nonlocal vnfr
 540                 nonlocal vdu2cloud_init
 541                 nonlocal tasks_by_target_record_id
 542                 vnf_preffix = "vnfrs:{}".format(vnfr_id)
 543                 ns_preffix = "nsrs:{}".format(nsr_id)
 544                 image_text = ns_preffix + ":image." + target_vdu["ns-image-id"]
 545                 flavor_text = ns_preffix + ":flavor." + target_vdu["ns-flavor-id"]
 546                 extra_dict = {"depends_on": [image_text, flavor_text]}
 547                 net_list = []
 548                 for iface_index, interface in enumerate(target_vdu["interfaces"]):
 549                     if interface.get("ns-vld-id"):
 550                         net_text = ns_preffix + ":vld." + interface["ns-vld-id"]
 551                     elif interface.get("vnf-vld-id"):
 552                         net_text = vnf_preffix + ":vld." + interface["vnf-vld-id"]
 553                     else:
 554                         self.logger.error("Interface {} from vdu {} not connected to any vld".format(
 555                             iface_index, target_vdu["vdu-name"]))
 556                         continue   # interface not connected to any vld
 557                     extra_dict["depends_on"].append(net_text)
 558                     net_item = {x: v for x, v in interface.items() if x in
 559                                 ("name", "vpci", "port_security", "port_security_disable_strategy", "floating_ip")}
 560                     net_item["net_id"] = "TASK-" + net_text
 561                     net_item["type"] = "virtual"
 562                     # TODO mac_address: used for  SR-IOV ifaces #TODO for other types
 563                     # TODO floating_ip: True/False (or it can be None)
 564                     if interface.get("type") in ("SR-IOV", "PCI-PASSTHROUGH"):
 565                         # mark the net create task as type data
 566                         if deep_get(tasks_by_target_record_id, net_text, "params", "net_type"):
 567                             tasks_by_target_record_id[net_text]["params"]["net_type"] = "data"
 568                         net_item["use"] = "data"
 569                         net_item["model"] = interface["type"]
 570                         net_item["type"] = interface["type"]
 571                     elif interface.get("type") == "OM-MGMT" or interface.get("mgmt-interface") or \
 572                             interface.get("mgmt-vnf"):
 573                         net_item["use"] = "mgmt"
 574                     else:   # if interface.get("type") in ("VIRTIO", "E1000", "PARAVIRT"):
 575                         net_item["use"] = "bridge"
 576                         net_item["model"] = interface.get("type")
 577                     if interface.get("ip-address"):
 578                         net_item["ip_address"] = interface["ip-address"]
 579                     if interface.get("mac-address"):
 580                         net_item["mac_address"] = interface["mac-address"]
 581                     net_list.append(net_item)
 582                     if interface.get("mgmt-vnf"):
 583                         extra_dict["mgmt_vnf_interface"] = iface_index
 584                     elif interface.get("mgmt-interface"):
 585                         extra_dict["mgmt_vdu_interface"] = iface_index
 586                 # cloud config
 587                 cloud_config = {}
 588                 if target_vdu.get("cloud-init"):
 589                     if target_vdu["cloud-init"] not in vdu2cloud_init:
 590                         vdu2cloud_init[target_vdu["cloud-init"]] = self._get_cloud_init(target_vdu["cloud-init"])
 591                     cloud_content_ = vdu2cloud_init[target_vdu["cloud-init"]]
 592                     cloud_config["user-data"] = self._parse_jinja2(cloud_content_, target_vdu.get("additionalParams"),
 593                                                                    target_vdu["cloud-init"])
 594                 if target_vdu.get("boot-data-drive"):
 595                     cloud_config["boot-data-drive"] = target_vdu.get("boot-data-drive")
 596                 ssh_keys = []
 597                 if target_vdu.get("ssh-keys"):
 598                     ssh_keys += target_vdu.get("ssh-keys")
 599                 if target_vdu.get("ssh-access-required"):
 600                     ssh_keys.append(ro_nsr_public_key)
 601                 if ssh_keys:
 602                     cloud_config["key-pairs"] = ssh_keys
 603
 604                 extra_dict["params"] = {
 605                     "name": "{}-{}-{}-{}".format(indata["name"][:16], vnfr["member-vnf-index-ref"][:16],
 606                                                  target_vdu["vdu-name"][:32], target_vdu.get("count-index") or 0),
 607                     "description": target_vdu["vdu-name"],
 608                     "start": True,
 609                     "image_id": "TASK-" + image_text,
 610                     "flavor_id": "TASK-" + flavor_text,
 611                     "net_list": net_list,
 612                     "cloud_config": cloud_config or None,
 613                     "disk_list": None,  # TODO
 614                     "availability_zone_index": None,  # TODO
 615                     "availability_zone_list": None,  # TODO
 616                 }
 617                 return extra_dict
 618
 619             def _process_items(target_list, existing_list, db_record, db_update, db_path, item, process_params):
 620                 nonlocal db_new_tasks
 621                 nonlocal tasks_by_target_record_id
 622                 nonlocal task_index
 623
 624                 # ensure all the target_list elements has an "id". If not assign the index as id
 625                 for target_index, tl in enumerate(target_list):
 626                     if tl and not tl.get("id"):
 627                         tl["id"] = str(target_index)
 628
 629                 # step 1 items (networks,vdus,...) to be deleted/updated
 630                 for item_index, existing_item in enumerate(existing_list):
 631                     target_item = next((t for t in target_list if t["id"] == existing_item["id"]), None)
 632                     for target_vim, existing_viminfo in existing_item.get("vim_info", {}).items():
 633                         if existing_viminfo is None:
 634                             continue
 635                         if target_item:
 636                             target_viminfo = target_item.get("vim_info", {}).get(target_vim)
 637                         else:
 638                             target_viminfo = None
 639                         if target_viminfo is None:
 640                             # must be deleted
 641                             self.assign_vim(target_vim)
 642                             target_record_id = "{}.{}".format(db_record, existing_item["id"])
 643                             item_ = item
 644                             if target_vim.startswith("sdn"):
 645                                 # item must be sdn-net instead of net if target_vim is a sdn
 646                                 item_ = "sdn_net"
 647                                 target_record_id += ".sdn"
 648                             task = _create_task(
 649                                 target_vim, item_, "DELETE",
 650                                 target_record="{}.{}.vim_info.{}".format(db_record, item_index, target_vim),
 651                                 target_record_id=target_record_id)
 652                             tasks_by_target_record_id[target_record_id] = task
 653                             db_new_tasks.append(task)
 654                             # TODO delete
 655                     # TODO check one by one the vims to be created/deleted
 656
 657                 # step 2 items (networks,vdus,...) to be created
 658                 for target_item in target_list:
 659                     item_index = -1
 660                     for item_index, existing_item in enumerate(existing_list):
 661                         if existing_item["id"] == target_item["id"]:
 662                             break
 663                     else:
 664                         item_index += 1
 665                         db_update[db_path + ".{}".format(item_index)] = target_item
 666                         existing_list.append(target_item)
 667                         existing_item = None
 668
 669                     for target_vim, target_viminfo in target_item.get("vim_info", {}).items():
 670                         existing_viminfo = None
 671                         if existing_item:
 672                             existing_viminfo = existing_item.get("vim_info", {}).get(target_vim)
 673                         # TODO check if different. Delete and create???
 674                         # TODO delete if not exist
 675                         if existing_viminfo is not None:
 676                             continue
 677
 678                         target_record_id = "{}.{}".format(db_record, target_item["id"])
 679                         item_ = item
 680                         if target_vim.startswith("sdn"):
 681                             # item must be sdn-net instead of net if target_vim is a sdn
 682                             item_ = "sdn_net"
 683                             target_record_id += ".sdn"
 684                         extra_dict = process_params(target_item, target_viminfo, target_record_id)
 685
 686                         self.assign_vim(target_vim)
 687                         task = _create_task(
 688                             target_vim, item_, "CREATE",
 689                             target_record="{}.{}.vim_info.{}".format(db_record, item_index, target_vim),
 690                             target_record_id=target_record_id,
 691                             extra_dict=extra_dict)
 692                         tasks_by_target_record_id[target_record_id] = task
 693                         db_new_tasks.append(task)
 694                         if target_item.get("common_id"):
 695                             task["common_id"] = target_item["common_id"]
 696
 697                         db_update[db_path + ".{}".format(item_index)] = target_item
 698
 699             def _process_action(indata):
 700                 nonlocal db_new_tasks
 701                 nonlocal task_index
 702                 nonlocal db_vnfrs
 703                 nonlocal db_ro_nsr
 704
 705                 if indata["action"]["action"] == "inject_ssh_key":
 706                     key = indata["action"].get("key")
 707                     user = indata["action"].get("user")
 708                     password = indata["action"].get("password")
 709                     for vnf in indata.get("vnf", ()):
 710                         if vnf["_id"] not in db_vnfrs:
 711                             raise NsException("Invalid vnf={}".format(vnf["_id"]))
 712                         db_vnfr = db_vnfrs[vnf["_id"]]
 713                         for target_vdu in vnf.get("vdur", ()):
 714                             vdu_index, vdur = next((i_v for i_v in enumerate(db_vnfr["vdur"]) if
 715                                                     i_v[1]["id"] == target_vdu["id"]), (None, None))
 716                             if not vdur:
 717                                 raise NsException("Invalid vdu vnf={}.{}".format(vnf["_id"], target_vdu["id"]))
 718                             target_vim, vim_info = next(k_v for k_v in vdur["vim_info"].items())
 719                             self.assign_vim(target_vim)
 720                             target_record = "vnfrs:{}:vdur.{}.ssh_keys".format(vnf["_id"], vdu_index)
 721                             extra_dict = {
 722                                 "depends_on": ["vnfrs:{}:vdur.{}".format(vnf["_id"], vdur["id"])],
 723                                 "params": {
 724                                     "ip_address": vdur.get("ip-address"),
 725                                     "user": user,
 726                                     "key": key,
 727                                     "password": password,
 728                                     "private_key": db_ro_nsr["private_key"],
 729                                     "salt": db_ro_nsr["_id"],
 730                                     "schema_version": db_ro_nsr["_admin"]["schema_version"]
 731                                 }
 732                             }
 733                             task = _create_task(target_vim, "vdu", "EXEC",
 734                                                 target_record=target_record,
 735                                                 target_record_id=None,
 736                                                 extra_dict=extra_dict)
 737                             db_new_tasks.append(task)
 738
 739             with self.write_lock:
 740                 if indata.get("action"):
 741                     _process_action(indata)
 742                 else:
 743                     # compute network differences
 744                     # NS.vld
 745                     step = "process NS VLDs"
 746                     _process_items(target_list=indata["ns"]["vld"] or [], existing_list=db_nsr.get("vld") or [],
 747                                    db_record="nsrs:{}:vld".format(nsr_id), db_update=db_nsr_update,
 748                                    db_path="vld", item="net", process_params=_process_net_params)
 749
 750                     step = "process NS images"
 751                     _process_items(target_list=indata.get("image") or [], existing_list=db_nsr.get("image") or [],
 752                                    db_record="nsrs:{}:image".format(nsr_id),
 753                                    db_update=db_nsr_update, db_path="image", item="image",
 754                                    process_params=_process_image_params)
 755
 756                     step = "process NS flavors"
 757                     _process_items(target_list=indata.get("flavor") or [], existing_list=db_nsr.get("flavor") or [],
 758                                    db_record="nsrs:{}:flavor".format(nsr_id),
 759                                    db_update=db_nsr_update, db_path="flavor", item="flavor",
 760                                    process_params=_process_flavor_params)
 761
 762                     # VNF.vld
 763                     for vnfr_id, vnfr in db_vnfrs.items():
 764                         # vnfr_id need to be set as global variable for among others nested method _process_vdu_params
 765                         step = "process VNF={} VLDs".format(vnfr_id)
 766                         target_vnf = next((vnf for vnf in indata.get("vnf", ()) if vnf["_id"] == vnfr_id), None)
 767                         target_list = target_vnf.get("vld") if target_vnf else None
 768                         _process_items(target_list=target_list or [], existing_list=vnfr.get("vld") or [],
 769                                        db_record="vnfrs:{}:vld".format(vnfr_id), db_update=db_vnfrs_update[vnfr["_id"]],
 770                                        db_path="vld", item="net", process_params=_process_net_params)
 771
 772                         target_list = target_vnf.get("vdur") if target_vnf else None
 773                         step = "process VNF={} VDUs".format(vnfr_id)
 774                         _process_items(target_list=target_list or [], existing_list=vnfr.get("vdur") or [],
 775                                        db_record="vnfrs:{}:vdur".format(vnfr_id),
 776                                        db_update=db_vnfrs_update[vnfr["_id"]], db_path="vdur", item="vdu",
 777                                        process_params=_process_vdu_params)
 778
 779                 for db_task in db_new_tasks:
 780                     step = "Updating database, Appending tasks to ro_tasks"
 781                     target_id = db_task.pop("target_id")
 782                     common_id = db_task.get("common_id")
 783                     if common_id:
 784                         if self.db.set_one("ro_tasks",
 785                                            q_filter={"target_id": target_id,
 786                                                      "tasks.common_id": common_id},
 787                                            update_dict={"to_check_at": now, "modified_at": now},
 788                                            push={"tasks": db_task}, fail_on_empty=False):
 789                             continue
 790                     if not self.db.set_one("ro_tasks",
 791                                            q_filter={"target_id": target_id,
 792                                                      "tasks.target_record": db_task["target_record"]},
 793                                            update_dict={"to_check_at": now, "modified_at": now},
 794                                            push={"tasks": db_task}, fail_on_empty=False):
 795                         # Create a ro_task
 796                         step = "Updating database, Creating ro_tasks"
 797                         db_ro_task = _create_ro_task(target_id, db_task)
 798                         nb_ro_tasks += 1
 799                         self.db.create("ro_tasks", db_ro_task)
 800                 step = "Updating database, nsrs"
 801                 if db_nsr_update:
 802                     self.db.set_one("nsrs", {"_id": nsr_id}, db_nsr_update)
 803                 for vnfr_id, db_vnfr_update in db_vnfrs_update.items():
 804                     if db_vnfr_update:
 805                         step = "Updating database, vnfrs={}".format(vnfr_id)
 806                         self.db.set_one("vnfrs", {"_id": vnfr_id}, db_vnfr_update)
 807
 808             self.logger.debug(logging_text + "Exit. Created {} ro_tasks; {} tasks".format(nb_ro_tasks,
 809                                                                                           len(db_new_tasks)))
 810             return {"status": "ok", "nsr_id": nsr_id, "action_id": action_id}, action_id, True
 811
 812         except Exception as e:
 813             if isinstance(e, (DbException, NsException)):
 814                 self.logger.error(logging_text + "Exit Exception while '{}': {}".format(step, e))
 815             else:
 816                 e = traceback_format_exc()
 817                 self.logger.critical(logging_text + "Exit Exception while '{}': {}".format(step, e), exc_info=True)
 818             raise NsException(e)
 819
 820     def delete(self, session, indata, version, nsr_id, *args, **kwargs):
 821         self.logger.debug("ns.delete version={} nsr_id={}".format(version, nsr_id))
 822         # self.db.del_list({"_id": ro_task["_id"], "tasks.nsr_id.ne": nsr_id})
 823         with self.write_lock:
 824             try:
 825                 NsWorker.delete_db_tasks(self.db, nsr_id, None)
 826             except NsWorkerException as e:
 827                 raise NsException(e)
 828         return None, None, True
 829
 830     def status(self, session, indata, version, nsr_id, action_id, *args, **kwargs):
 831         # self.logger.debug("ns.status version={} nsr_id={}, action_id={} indata={}"
 832         #                   .format(version, nsr_id, action_id, indata))
 833         task_list = []
 834         done = 0
 835         total = 0
 836         ro_tasks = self.db.get_list("ro_tasks", {"tasks.action_id": action_id})
 837         global_status = "DONE"
 838         details = []
 839         for ro_task in ro_tasks:
 840             for task in ro_task["tasks"]:
 841                 if task and task["action_id"] == action_id:
 842                     task_list.append(task)
 843                     total += 1
 844                     if task["status"] == "FAILED":
 845                         global_status = "FAILED"
 846                         error_text = "Error at {} {}: {}".format(task["action"].lower(), task["item"],
 847                                                                  ro_task["vim_info"].get("vim_details") or "unknown")
 848                         details.append(error_text)
 849                     elif task["status"] in ("SCHEDULED", "BUILD"):
 850                         if global_status != "FAILED":
 851                             global_status = "BUILD"
 852                     else:
 853                         done += 1
 854         return_data = {
 855             "status": global_status,
 856             "details": ". ".join(details) if details else "progress {}/{}".format(done, total),
 857             "nsr_id": nsr_id,
 858             "action_id": action_id,
 859             "tasks": task_list
 860         }
 861         return return_data, None, True
 862
 863     def cancel(self, session, indata, version, nsr_id, action_id, *args, **kwargs):
 864         print("ns.cancel session={} indata={} version={} nsr_id={}, action_id={}".format(session, indata, version,
 865                                                                                          nsr_id, action_id))
 866         return None, None, True
 867
 868     def get_deploy(self, session, indata, version, nsr_id, action_id, *args, **kwargs):
 869         nsrs = self.db.get_list("nsrs", {})
 870         return_data = []
 871         for ns in nsrs:
 872             return_data.append({"_id": ns["_id"], "name": ns["name"]})
 873         return return_data, None, True
 874
 875     def get_actions(self, session, indata, version, nsr_id, action_id, *args, **kwargs):
 876         ro_tasks = self.db.get_list("ro_tasks", {"tasks.nsr_id": nsr_id})
 877         return_data = []
 878         for ro_task in ro_tasks:
 879             for task in ro_task["tasks"]:
 880                 if task["action_id"] not in return_data:
 881                     return_data.append(task["action_id"])
 882         return return_data, None, True