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