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 import json
  29
  30 from peewee import CharField, TextField, FloatField, Model, AutoField, Proxy
  31 from peewee_migrate import Router
  32 from playhouse.db_url import connect
  33
  34 from osm_mon import migrations
  35 from osm_mon.core.config import Config
  36
  37 log = logging.getLogger(__name__)
  38
  39 db = Proxy()
  40
  41
  42 class BaseModel(Model):
  43     id = AutoField(primary_key=True)
  44
  45     class Meta:
  46         database = db
  47
  48
  49 class VimCredentials(BaseModel):
  50     uuid = CharField(unique=True)
  51     name = CharField()
  52     type = CharField()
  53     url = CharField()
  54     user = CharField()
  55     password = CharField()
  56     tenant_name = CharField()
  57     config = TextField()
  58
  59
  60 class Alarm(BaseModel):
  61     uuid = CharField(unique=True)
  62     name = CharField()
  63     severity = CharField()
  64     threshold = FloatField()
  65     operation = CharField()
  66     statistic = CharField()
  67     monitoring_param = CharField()
  68     vdur_name = CharField()
  69     vnf_member_index = CharField()
  70     nsr_id = CharField()
  71
  72
  73 class DatabaseManager:
  74     def __init__(self, config: Config):
  75         db.initialize(connect(config.get('sql', 'database_uri')))
  76
  77     def create_tables(self) -> None:
  78         db.connect()
  79         with db.atomic():
  80             router = Router(db, os.path.dirname(migrations.__file__))
  81             router.run()
  82         db.close()
  83
  84     def get_credentials(self, vim_uuid: str = None) -> VimCredentials:
  85         db.connect()
  86         with db.atomic():
  87             vim_credentials = VimCredentials.get_or_none(VimCredentials.uuid == vim_uuid)
  88         db.close()
  89         return vim_credentials
  90
  91     def save_credentials(self, vim_credentials) -> VimCredentials:
  92         """Saves vim credentials. If a record with same uuid exists, overwrite it."""
  93         db.connect()
  94         with db.atomic():
  95             exists = VimCredentials.get_or_none(VimCredentials.uuid == vim_credentials.uuid)
  96             if exists:
  97                 vim_credentials.id = exists.id
  98             vim_credentials.save()
  99         db.close()
 100         return vim_credentials
 101
 102     def get_alarm(self, alarm_id) -> Alarm:
 103         db.connect()
 104         with db.atomic():
 105             alarm = (Alarm.select()
 106                      .where(Alarm.alarm_id == alarm_id)
 107                      .get())
 108         db.close()
 109         return alarm
 110
 111     def save_alarm(self, name, threshold, operation, severity, statistic, metric_name, vdur_name,
 112                    vnf_member_index, nsr_id) -> Alarm:
 113         """Saves alarm."""
 114         # TODO: Add uuid optional param and check if exists to handle updates (see self.save_credentials)
 115         db.connect()
 116         with db.atomic():
 117             alarm = Alarm()
 118             alarm.uuid = str(uuid.uuid4())
 119             alarm.name = name
 120             alarm.threshold = threshold
 121             alarm.operation = operation
 122             alarm.severity = severity
 123             alarm.statistic = statistic
 124             alarm.monitoring_param = metric_name
 125             alarm.vdur_name = vdur_name
 126             alarm.vnf_member_index = vnf_member_index
 127             alarm.nsr_id = nsr_id
 128             alarm.save()
 129         db.close()
 130         return alarm
 131
 132     def delete_alarm(self, alarm_uuid) -> None:
 133         db.connect()
 134         with db.atomic():
 135             alarm = (Alarm.select()
 136                      .where(Alarm.uuid == alarm_uuid)
 137                      .get())
 138             alarm.delete_instance()
 139         db.close()
 140
 141     def get_vim_type(self, vim_account_id) -> str:
 142         """Get the vim type that is required by the message."""
 143         vim_type = None
 144         credentials = self.get_credentials(vim_account_id)
 145         config = json.loads(credentials.config)
 146         if 'vim_type' in config:
 147             vim_type = config['vim_type']
 148             return str(vim_type.lower())
 149         else:
 150             return str(credentials.type)