osm_nbi/engine.py

   1 # -*- coding: utf-8 -*-
   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
  12 # implied.
  13 # See the License for the specific language governing permissions and
  14 # limitations under the License.
  15
  16 import logging
  17
  18 # import yaml
  19 from osm_common import (
  20     dbmongo,
  21     dbmemory,
  22     fslocal,
  23     fsmongo,
  24     msglocal,
  25     msgkafka,
  26     version as common_version,
  27 )
  28 from osm_common.dbbase import DbException
  29 from osm_common.fsbase import FsException
  30 from osm_common.msgbase import MsgException
  31 from http import HTTPStatus
  32
  33 from osm_nbi.authconn_keystone import AuthconnKeystone
  34 from osm_nbi.authconn_internal import AuthconnInternal
  35 from osm_nbi.authconn_tacacs import AuthconnTacacs
  36 from osm_nbi.base_topic import EngineException, versiontuple
  37 from osm_nbi.admin_topics import VimAccountTopic, WimAccountTopic, SdnTopic
  38 from osm_nbi.admin_topics import K8sClusterTopic, K8sRepoTopic, OsmRepoTopic
  39 from osm_nbi.admin_topics import VcaTopic
  40 from osm_nbi.admin_topics import UserTopicAuth, ProjectTopicAuth, RoleTopicAuth
  41 from osm_nbi.descriptor_topics import (
  42     VnfdTopic,
  43     NsdTopic,
  44     PduTopic,
  45     NstTopic,
  46     VnfPkgOpTopic,
  47 )
  48 from osm_nbi.instance_topics import (
  49     NsrTopic,
  50     VnfrTopic,
  51     NsLcmOpTopic,
  52     NsiTopic,
  53     NsiLcmOpTopic,
  54 )
  55 from osm_nbi.vnf_instance_topics import VnfInstances, VnfLcmOpTopic
  56 from osm_nbi.pmjobs_topics import PmJobsTopic
  57 from osm_nbi.subscription_topics import NslcmSubscriptionsTopic
  58 from osm_nbi.osm_vnfm.vnf_subscription import VnflcmSubscriptionsTopic
  59 from base64 import b64encode
  60 from os import urandom  # , path
  61 from threading import Lock
  62
  63 __author__ = "Alfonso Tierno <alfonso.tiernosepulveda@telefonica.com>"
  64 min_common_version = "0.1.16"
  65
  66
  67 class Engine(object):
  68     map_from_topic_to_class = {
  69         "vnfds": VnfdTopic,
  70         "nsds": NsdTopic,
  71         "nsts": NstTopic,
  72         "pdus": PduTopic,
  73         "nsrs": NsrTopic,
  74         "vnfrs": VnfrTopic,
  75         "nslcmops": NsLcmOpTopic,
  76         "vim_accounts": VimAccountTopic,
  77         "wim_accounts": WimAccountTopic,
  78         "sdns": SdnTopic,
  79         "k8sclusters": K8sClusterTopic,
  80         "vca": VcaTopic,
  81         "k8srepos": K8sRepoTopic,
  82         "osmrepos": OsmRepoTopic,
  83         "users": UserTopicAuth,  # Valid for both internal and keystone authentication backends
  84         "projects": ProjectTopicAuth,  # Valid for both internal and keystone authentication backends
  85         "roles": RoleTopicAuth,  # Valid for both internal and keystone authentication backends
  86         "nsis": NsiTopic,
  87         "nsilcmops": NsiLcmOpTopic,
  88         "vnfpkgops": VnfPkgOpTopic,
  89         "nslcm_subscriptions": NslcmSubscriptionsTopic,
  90         "vnf_instances": VnfInstances,
  91         "vnflcmops": VnfLcmOpTopic,
  92         "vnflcm_subscriptions": VnflcmSubscriptionsTopic,
  93         # [NEW_TOPIC]: add an entry here
  94         # "pm_jobs": PmJobsTopic will be added manually because it needs other parameters
  95     }
  96
  97     map_target_version_to_int = {
  98         "1.0": 1000,
  99         "1.1": 1001,
 100         "1.2": 1002,
 101         # Add new versions here
 102     }
 103
 104     def __init__(self, authenticator):
 105         self.db = None
 106         self.fs = None
 107         self.msg = None
 108         self.authconn = None
 109         self.config = None
 110         # self.operations = None
 111         self.logger = logging.getLogger("nbi.engine")
 112         self.map_topic = {}
 113         self.write_lock = None
 114         # self.token_cache = token_cache
 115         self.authenticator = authenticator
 116
 117     def start(self, config):
 118         """
 119         Connect to database, filesystem storage, and messaging
 120         :param config: two level dictionary with configuration. Top level should contain 'database', 'storage',
 121         :return: None
 122         """
 123         self.config = config
 124         # check right version of common
 125         if versiontuple(common_version) < versiontuple(min_common_version):
 126             raise EngineException(
 127                 "Not compatible osm/common version '{}'. Needed '{}' or higher".format(
 128                     common_version, min_common_version
 129                 )
 130             )
 131
 132         try:
 133             if not self.db:
 134                 if config["database"]["driver"] == "mongo":
 135                     self.db = dbmongo.DbMongo()
 136                     self.db.db_connect(config["database"])
 137                 elif config["database"]["driver"] == "memory":
 138                     self.db = dbmemory.DbMemory()
 139                     self.db.db_connect(config["database"])
 140                 else:
 141                     raise EngineException(
 142                         "Invalid configuration param '{}' at '[database]':'driver'".format(
 143                             config["database"]["driver"]
 144                         )
 145                     )
 146             if not self.fs:
 147                 if config["storage"]["driver"] == "local":
 148                     self.fs = fslocal.FsLocal()
 149                     self.fs.fs_connect(config["storage"])
 150                 elif config["storage"]["driver"] == "mongo":
 151                     self.fs = fsmongo.FsMongo()
 152                     self.fs.fs_connect(config["storage"])
 153                 else:
 154                     raise EngineException(
 155                         "Invalid configuration param '{}' at '[storage]':'driver'".format(
 156                             config["storage"]["driver"]
 157                         )
 158                     )
 159             if not self.msg:
 160                 if config["message"]["driver"] == "local":
 161                     self.msg = msglocal.MsgLocal()
 162                     self.msg.connect(config["message"])
 163                 elif config["message"]["driver"] == "kafka":
 164                     self.msg = msgkafka.MsgKafka()
 165                     self.msg.connect(config["message"])
 166                 else:
 167                     raise EngineException(
 168                         "Invalid configuration param '{}' at '[message]':'driver'".format(
 169                             config["message"]["driver"]
 170                         )
 171                     )
 172             if not self.authconn:
 173                 if config["authentication"]["backend"] == "keystone":
 174                     self.authconn = AuthconnKeystone(
 175                         config["authentication"],
 176                         self.db,
 177                         self.authenticator.role_permissions,
 178                     )
 179                 elif config["authentication"]["backend"] == "tacacs":
 180                     self.authconn = AuthconnTacacs(
 181                         config["authentication"],
 182                         self.db,
 183                         self.authenticator.role_permissions,
 184                     )
 185                 else:
 186                     self.authconn = AuthconnInternal(
 187                         config["authentication"],
 188                         self.db,
 189                         self.authenticator.role_permissions,
 190                     )
 191             # if not self.operations:
 192             #     if "resources_to_operations" in config["rbac"]:
 193             #         resources_to_operations_file = config["rbac"]["resources_to_operations"]
 194             #     else:
 195             #         possible_paths = (
 196             #             __file__[:__file__.rfind("engine.py")] + "resources_to_operations.yml",
 197             #             "./resources_to_operations.yml"
 198             #         )
 199             #         for config_file in possible_paths:
 200             #             if path.isfile(config_file):
 201             #                 resources_to_operations_file = config_file
 202             #                 break
 203             #         if not resources_to_operations_file:
 204             #             raise EngineException("Invalid permission configuration:"
 205             #                 "resources_to_operations file missing")
 206             #
 207             #     with open(resources_to_operations_file, 'r') as f:
 208             #         resources_to_operations = yaml.load(f, Loader=yaml.Loader)
 209             #
 210             #     self.operations = []
 211             #
 212             #     for _, value in resources_to_operations["resources_to_operations"].items():
 213             #         if value not in self.operations:
 214             #             self.operations += [value]
 215
 216             self.write_lock = Lock()
 217             # create one class per topic
 218             for topic, topic_class in self.map_from_topic_to_class.items():
 219                 # if self.auth and topic_class in (UserTopicAuth, ProjectTopicAuth):
 220                 #     self.map_topic[topic] = topic_class(self.db, self.fs, self.msg, self.auth)
 221                 self.map_topic[topic] = topic_class(
 222                     self.db, self.fs, self.msg, self.authconn
 223                 )
 224
 225             self.map_topic["pm_jobs"] = PmJobsTopic(
 226                 self.db,
 227                 config["prometheus"].get("host"),
 228                 config["prometheus"].get("port"),
 229             )
 230         except (DbException, FsException, MsgException) as e:
 231             raise EngineException(str(e), http_code=e.http_code)
 232
 233     def stop(self):
 234         try:
 235             if self.db:
 236                 self.db.db_disconnect()
 237             if self.fs:
 238                 self.fs.fs_disconnect()
 239             if self.msg:
 240                 self.msg.disconnect()
 241             self.write_lock = None
 242         except (DbException, FsException, MsgException) as e:
 243             raise EngineException(str(e), http_code=e.http_code)
 244
 245     def new_item(
 246         self, rollback, session, topic, indata=None, kwargs=None, headers=None
 247     ):
 248         """
 249         Creates a new entry into database. For nsds and vnfds it creates an almost empty DISABLED  entry,
 250         that must be completed with a call to method upload_content
 251         :param rollback: list to append created items at database in case a rollback must to be done
 252         :param session: contains the used login username and working project, force to avoid checkins, public
 253         :param topic: it can be: users, projects, vim_accounts, sdns, nsrs, nsds, vnfds
 254         :param indata: data to be inserted
 255         :param kwargs: used to override the indata descriptor
 256         :param headers: http request headers
 257         :return: _id: identity of the inserted data.
 258         """
 259         if topic not in self.map_topic:
 260             raise EngineException(
 261                 "Unknown topic {}!!!".format(topic), HTTPStatus.INTERNAL_SERVER_ERROR
 262             )
 263         with self.write_lock:
 264             return self.map_topic[topic].new(rollback, session, indata, kwargs, headers)
 265
 266     def upload_content(self, session, topic, _id, indata, kwargs, headers):
 267         """
 268         Upload content for an already created entry (_id)
 269         :param session: contains the used login username and working project
 270         :param topic: it can be: users, projects, vnfds, nsds,
 271         :param _id: server id of the item
 272         :param indata: data to be inserted
 273         :param kwargs: used to override the indata descriptor
 274         :param headers: http request headers
 275         :return: _id: identity of the inserted data.
 276         """
 277         if topic not in self.map_topic:
 278             raise EngineException(
 279                 "Unknown topic {}!!!".format(topic), HTTPStatus.INTERNAL_SERVER_ERROR
 280             )
 281         with self.write_lock:
 282             return self.map_topic[topic].upload_content(
 283                 session, _id, indata, kwargs, headers
 284             )
 285
 286     def get_item_list(self, session, topic, filter_q=None, api_req=False):
 287         """
 288         Get a list of items
 289         :param session: contains the used login username and working project
 290         :param topic: it can be: users, projects, vnfds, nsds, ...
 291         :param filter_q: filter of data to be applied
 292         :param api_req: True if this call is serving an external API request. False if serving internal request.
 293         :return: The list, it can be empty if no one match the filter_q.
 294         """
 295         if topic not in self.map_topic:
 296             raise EngineException("Unknown topic {}!!!".format(topic), HTTPStatus.INTERNAL_SERVER_ERROR)
 297         return self.map_topic[topic].list(session, filter_q, api_req)
 298
 299     def get_item(self, session, topic, _id, filter_q=None, api_req=False):
 300         """
 301         Get complete information on an item
 302         :param session: contains the used login username and working project
 303         :param topic: it can be: users, projects, vnfds, nsds,
 304         :param _id: server id of the item
 305         :param filter_q: other arguments
 306         :param api_req: True if this call is serving an external API request. False if serving internal request.
 307         :return: dictionary, raise exception if not found.
 308         """
 309         if topic not in self.map_topic:
 310             raise EngineException("Unknown topic {}!!!".format(topic), HTTPStatus.INTERNAL_SERVER_ERROR)
 311         return self.map_topic[topic].show(session, _id, filter_q, api_req)
 312
 313     def get_file(self, session, topic, _id, path=None, accept_header=None):
 314         """
 315         Get descriptor package or artifact file content
 316         :param session: contains the used login username and working project
 317         :param topic: it can be: users, projects, vnfds, nsds,
 318         :param _id: server id of the item
 319         :param path: artifact path or "$DESCRIPTOR" or None
 320         :param accept_header: Content of Accept header. Must contain applition/zip or/and text/plain
 321         :return: opened file plus Accept format or raises an exception
 322         """
 323         if topic not in self.map_topic:
 324             raise EngineException(
 325                 "Unknown topic {}!!!".format(topic), HTTPStatus.INTERNAL_SERVER_ERROR
 326             )
 327         return self.map_topic[topic].get_file(session, _id, path, accept_header)
 328
 329     def del_item_list(self, session, topic, _filter=None):
 330         """
 331         Delete a list of items
 332         :param session: contains the used login username and working project
 333         :param topic: it can be: users, projects, vnfds, nsds, ...
 334         :param _filter: filter of data to be applied
 335         :return: The deleted list, it can be empty if no one match the _filter.
 336         """
 337         if topic not in self.map_topic:
 338             raise EngineException(
 339                 "Unknown topic {}!!!".format(topic), HTTPStatus.INTERNAL_SERVER_ERROR
 340             )
 341         with self.write_lock:
 342             return self.map_topic[topic].delete_list(session, _filter)
 343
 344     def del_item(self, session, topic, _id, not_send_msg=None):
 345         """
 346         Delete item by its internal id
 347         :param session: contains the used login username and working project
 348         :param topic: it can be: users, projects, vnfds, nsds, ...
 349         :param _id: server id of the item
 350         :param not_send_msg: If False, message will not be sent to kafka.
 351             If a list, message is not sent, but content is stored in this variable so that the caller can send this
 352             message using its own loop. If None, message is sent
 353         :return: dictionary with deleted item _id. It raises exception if not found.
 354         """
 355         if topic not in self.map_topic:
 356             raise EngineException(
 357                 "Unknown topic {}!!!".format(topic), HTTPStatus.INTERNAL_SERVER_ERROR
 358             )
 359         with self.write_lock:
 360             return self.map_topic[topic].delete(session, _id, not_send_msg=not_send_msg)
 361
 362     def edit_item(self, session, topic, _id, indata=None, kwargs=None):
 363         """
 364         Update an existing entry at database
 365         :param session: contains the used login username and working project
 366         :param topic: it can be: users, projects, vnfds, nsds, ...
 367         :param _id: identifier to be updated
 368         :param indata: data to be inserted
 369         :param kwargs: used to override the indata descriptor
 370         :return: dictionary with edited item _id, raise exception if not found.
 371         """
 372         if topic not in self.map_topic:
 373             raise EngineException(
 374                 "Unknown topic {}!!!".format(topic), HTTPStatus.INTERNAL_SERVER_ERROR
 375             )
 376         with self.write_lock:
 377             return self.map_topic[topic].edit(session, _id, indata, kwargs)
 378
 379     def upgrade_db(self, current_version, target_version):
 380         if target_version not in self.map_target_version_to_int.keys():
 381             raise EngineException(
 382                 "Cannot upgrade to version '{}' with this version of code".format(
 383                     target_version
 384                 ),
 385                 http_code=HTTPStatus.INTERNAL_SERVER_ERROR,
 386             )
 387
 388         if current_version == target_version:
 389             return
 390
 391         target_version_int = self.map_target_version_to_int[target_version]
 392
 393         if not current_version:
 394             # create database version
 395             serial = urandom(32)
 396             version_data = {
 397                 "_id": "version",  # Always "version"
 398                 "version_int": 1000,  # version number
 399                 "version": "1.0",  # version text
 400                 "date": "2018-10-25",  # version date
 401                 "description": "added serial",  # changes in this version
 402                 "status": "ENABLED",  # ENABLED, DISABLED (migration in process), ERROR,
 403                 "serial": b64encode(serial),
 404             }
 405             self.db.create("admin", version_data)
 406             self.db.set_secret_key(serial)
 407             current_version = "1.0"
 408
 409         if (
 410             current_version in ("1.0", "1.1")
 411             and target_version_int >= self.map_target_version_to_int["1.2"]
 412         ):
 413             if self.config["authentication"]["backend"] == "internal":
 414                 self.db.del_list("roles")
 415
 416             version_data = {
 417                 "_id": "version",
 418                 "version_int": 1002,
 419                 "version": "1.2",
 420                 "date": "2019-06-11",
 421                 "description": "set new format for roles_operations",
 422             }
 423
 424             self.db.set_one("admin", {"_id": "version"}, version_data)
 425             current_version = "1.2"
 426             # TODO add future migrations here
 427
 428     def init_db(self, target_version="1.0"):
 429         """
 430         Init database if empty. If not empty it checks that database version and migrates if needed
 431         If empty, it creates a new user admin/admin at 'users' and a new entry at 'version'
 432         :param target_version: check desired database version. Migrate to it if possible or raises exception
 433         :return: None if ok, exception if error or if the version is different.
 434         """
 435
 436         version_data = self.db.get_one(
 437             "admin", {"_id": "version"}, fail_on_empty=False, fail_on_more=True
 438         )
 439         # check database status is ok
 440         if version_data and version_data.get("status") != "ENABLED":
 441             raise EngineException(
 442                 "Wrong database status '{}'".format(version_data["status"]),
 443                 HTTPStatus.INTERNAL_SERVER_ERROR,
 444             )
 445
 446         # check version
 447         db_version = None if not version_data else version_data.get("version")
 448         if db_version != target_version:
 449             self.upgrade_db(db_version, target_version)
 450
 451         return