osm_mon/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
  25 import logging
  26 import os
  27 import uuid
  28
  29 from peewee import CharField, TextField, FloatField, Model, AutoField, Proxy
  30 from peewee_migrate import Router
  31 from playhouse.db_url import connect
  32
  33 from osm_mon import migrations
  34 from osm_mon.core.config import Config
  35
  36 log = logging.getLogger(__name__)
  37
  38 db = Proxy()
  39
  40
  41 class BaseModel(Model):
  42     id = AutoField(primary_key=True)
  43
  44     class Meta:
  45         database = db
  46
  47
  48 class VimCredentials(BaseModel):
  49     uuid = CharField(unique=True)
  50     name = CharField()
  51     type = CharField()
  52     url = CharField()
  53     user = CharField()
  54     password = CharField()
  55     tenant_name = CharField()
  56     config = TextField(default='{}')
  57
  58
  59 class Alarm(BaseModel):
  60     uuid = CharField(unique=True)
  61     name = CharField()
  62     severity = CharField()
  63     threshold = FloatField()
  64     operation = CharField()
  65     statistic = CharField()
  66     monitoring_param = CharField()
  67     vdur_name = CharField()
  68     vnf_member_index = CharField()
  69     nsr_id = CharField()
  70
  71
  72 class DatabaseManager:
  73     def __init__(self, config: Config):
  74         db.initialize(connect(config.get('sql', 'database_uri')))
  75
  76     def create_tables(self) -> None:
  77         with db.atomic():
  78             router = Router(db, os.path.dirname(migrations.__file__))
  79             router.run()
  80
  81     def get_credentials(self, vim_uuid: str = None) -> VimCredentials:
  82         with db.atomic():
  83             return VimCredentials.get_or_none(VimCredentials.uuid == vim_uuid)
  84
  85     def save_credentials(self, vim_credentials) -> VimCredentials:
  86         """Saves vim credentials. If a record with same uuid exists, overwrite it."""
  87         with db.atomic():
  88             exists = VimCredentials.get_or_none(VimCredentials.uuid == vim_credentials.uuid)
  89             if exists:
  90                 vim_credentials.id = exists.id
  91             vim_credentials.save()
  92             return vim_credentials
  93
  94     def get_alarm(self, alarm_id) -> Alarm:
  95         with db.atomic():
  96             alarm = (Alarm.select()
  97                      .where(Alarm.alarm_id == alarm_id)
  98                      .get())
  99             return alarm
 100
 101     def save_alarm(self, name, threshold, operation, severity, statistic, metric_name, vdur_name,
 102                    vnf_member_index, nsr_id) -> Alarm:
 103         """Saves alarm."""
 104         # TODO: Add uuid optional param and check if exists to handle updates (see self.save_credentials)
 105         with db.atomic():
 106             alarm = Alarm()
 107             alarm.uuid = str(uuid.uuid4())
 108             alarm.name = name
 109             alarm.threshold = threshold
 110             alarm.operation = operation
 111             alarm.severity = severity
 112             alarm.statistic = statistic
 113             alarm.monitoring_param = metric_name
 114             alarm.vdur_name = vdur_name
 115             alarm.vnf_member_index = vnf_member_index
 116             alarm.nsr_id = nsr_id
 117             alarm.save()
 118             return alarm
 119
 120     def delete_alarm(self, alarm_uuid) -> None:
 121         with db.atomic():
 122             alarm = (Alarm.select()
 123                      .where(Alarm.uuid == alarm_uuid)
 124                      .get())
 125             alarm.delete_instance()
 126
 127     def get_vim_type(self, vim_account_id) -> str:
 128         """Get the vim type that is required by the message."""
 129         credentials = self.get_credentials(vim_account_id)
 130         return str(credentials.type)