cff99e4d1c
- Added a database connection check to the health check. - Added a MaaS connection check to the health check. Change-Id: I6c771a9ed6a278eb75dbc0f2e503088ff9046149
74 lines
2.6 KiB
Python
74 lines
2.6 KiB
Python
# Copyright 2017 AT&T Intellectual Property. All other rights reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import falcon
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import json
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from drydock_provisioner.control.base import BaseResource
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from drydock_provisioner.drivers.node.maasdriver.actions.node import ValidateNodeServices
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from drydock_provisioner.objects.fields import ActionResult
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import drydock_provisioner.objects.fields as hd_fields
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class HealthResource(BaseResource):
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"""
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Return empty response/body to show
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that Drydock is healthy
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"""
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def __init__(self, state_manager=None, orchestrator=None, **kwargs):
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"""Object initializer.
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:param state_manager: instance of Drydock state_manager
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"""
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super().__init__(**kwargs)
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self.state_manager = state_manager
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self.orchestrator = orchestrator
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def on_get(self, req, resp):
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"""
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Returns 204 on success, otherwise 500 with a response body.
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"""
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healthy = True
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# Test database connection
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try:
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now = self.state_manager.get_now()
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if now is None:
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raise Exception('None received from database for now()')
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except Exception as ex:
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healthy = False
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resp.body = json.dumps({
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'type': 'error',
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'message': 'Database error',
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'retry': True
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})
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resp.status = falcon.HTTP_500
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# Test MaaS connection
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try:
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task = self.orchestrator.create_task(action=hd_fields.OrchestratorAction.Noop)
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maas_validation = ValidateNodeServices(task, self.orchestrator, self.state_manager)
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maas_validation.start()
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if maas_validation.task.get_status() == ActionResult.Failure:
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raise Exception('MaaS task failure')
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except Exception as ex:
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healthy = False
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resp.body = json.dumps({
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'type': 'error',
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'message': 'MaaS error',
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'retry': True
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})
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resp.status = falcon.HTTP_500
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if healthy:
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resp.status = falcon.HTTP_204
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