osm_policy_module/core/database.py

   1 # -*- coding: utf-8 -*-
   2
   3 # Copyright 2018 Whitestack, LLC
   4 # *************************************************************
   5
   6 # This file is part of OSM Monitoring module
   7 # All Rights Reserved to Whitestack, LLC
   8
   9 # Licensed under the Apache License, Version 2.0 (the "License"); you may
  10 # not use this file except in compliance with the License. You may obtain
  11 # a copy of the License at
  12
  13 #         http://www.apache.org/licenses/LICENSE-2.0
  14
  15 # Unless required by applicable law or agreed to in writing, software
  16 # distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
  17 # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
  18 # License for the specific language governing permissions and limitations
  19 # under the License.
  20
  21 # For those usages not covered by the Apache License, Version 2.0 please
  22 # contact: bdiaz@whitestack.com or glavado@whitestack.com
  23 ##
  24 import datetime
  25 import logging
  26
  27 from peewee import CharField, IntegerField, ForeignKeyField, Model, TextField, AutoField, DateTimeField, Proxy
  28 from playhouse.db_url import connect
  29
  30 from osm_policy_module.core.config import Config
  31
  32 log = logging.getLogger(__name__)
  33
  34 db = Proxy()
  35
  36
  37 class BaseModel(Model):
  38     id = AutoField(primary_key=True)
  39
  40     class Meta:
  41         database = db
  42
  43
  44 class ScalingGroup(BaseModel):
  45     nsr_id = CharField()
  46     vnf_member_index = IntegerField()
  47     name = CharField()
  48     content = TextField()
  49
  50
  51 class ScalingPolicy(BaseModel):
  52     name = CharField()
  53     cooldown_time = IntegerField()
  54     last_scale = DateTimeField(default=datetime.datetime.now)
  55     scaling_group = ForeignKeyField(ScalingGroup, related_name='scaling_policies', on_delete='CASCADE')
  56
  57
  58 class ScalingCriteria(BaseModel):
  59     name = CharField()
  60     scaling_policy = ForeignKeyField(ScalingPolicy, related_name='scaling_criterias', on_delete='CASCADE')
  61
  62
  63 class ScalingAlarm(BaseModel):
  64     alarm_uuid = CharField(unique=True)
  65     action = CharField()
  66     vnf_member_index = IntegerField()
  67     vdu_name = CharField()
  68     scaling_criteria = ForeignKeyField(ScalingCriteria, related_name='scaling_alarms', on_delete='CASCADE')
  69
  70
  71 class DatabaseManager:
  72     def init_db(self, config: Config):
  73         db.initialize(connect(config.get('sql', 'database_uri')))
  74         self.create_tables()
  75
  76     def create_tables(self):
  77         with db.atomic():
  78             db.create_tables([ScalingGroup, ScalingPolicy, ScalingCriteria, ScalingAlarm])
  79
  80     def get_alarm(self, alarm_uuid: str):
  81         with db.atomic():
  82             return ScalingAlarm.select().where(ScalingAlarm.alarm_uuid == alarm_uuid).get()