4e168edf6e
Provide new healtcheck endpoint to monasca-api. Add simple check for HEAD and complex check for GET. Complex check contains information about dependent services like: - kafka - relational database (mariadb, postgresql) - timeseries database (influxdb, cassandra) Story: 2000974 Task: 4125 Change-Id: I863071194041a512b144262bbffce5024b97086b
50 lines
1.6 KiB
Python
50 lines
1.6 KiB
Python
# Copyright 2017 FUJITSU LIMITED
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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from oslo_log import log
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from sqlalchemy import text
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from monasca_api.common.repositories.sqla import sql_repository
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from monasca_api.healthcheck import base
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LOG = log.getLogger(__name__)
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class AlarmsDbHealthCheck(base.BaseHealthCheck,
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sql_repository.SQLRepository):
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"""Evaluates alarm db health
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Healthcheck verifies if:
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* database is up and running, it is possible to establish connection
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* sample sql query can be executed
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If following conditions are met health check return healthy status.
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Otherwise unhealthy status is returned with explanation.
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"""
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def health_check(self):
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status = self.check_db_status()
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return base.CheckResult(healthy=status[0],
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message=status[1])
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def check_db_status(self):
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try:
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with self._db_engine.connect() as con:
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query = text('SELECT 1')
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con.execute(query)
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except Exception as ex:
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LOG.exception(str(ex))
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return False, str(ex)
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return True, 'OK'
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