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