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