106 lines
3.9 KiB
Python
106 lines
3.9 KiB
Python
# Copyright 2011 OpenStack Foundation.
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# All Rights Reserved.
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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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import logging
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import os
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from oslo_middleware._i18n import _LW
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from oslo_middleware.healthcheck import pluginbase
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LOG = logging.getLogger(__name__)
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class DisableByFilesPortsHealthcheck(pluginbase.HealthcheckBaseExtension):
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"""DisableByFilesPorts healthcheck middleware plugin
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This plugin checks presence of a file that is provided for a application
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running on a certain port to report if the service is unavailable
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or not.
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Example of middleware configuration:
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.. code-block:: ini
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[filter:healthcheck]
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paste.filter_factory = oslo_middleware:Healthcheck.factory
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path = /healthcheck
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backends = disable_by_files_ports
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disable_by_file_paths = 5000:/var/run/keystone/healthcheck_disable, \
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35357:/var/run/keystone/admin_healthcheck_disable
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"""
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def __init__(self, conf):
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super(DisableByFilesPortsHealthcheck, self).__init__(conf)
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self.status_files = {}
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self.status_files.update(
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self._iter_paths_ports(self.conf.get('disable_by_file_paths')))
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@staticmethod
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def _iter_paths_ports(paths):
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if paths:
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for port_path in paths.split(","):
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port_path = port_path.strip()
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if port_path:
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port, path = port_path.split(":")
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port = int(port)
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yield (port, path)
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def healthcheck(self, server_port):
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path = self.status_files.get(server_port)
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if not path:
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LOG.warning(_LW('DisableByFilesPorts healthcheck middleware'
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' enabled without disable_by_file_paths set'
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' for port %s') % server_port)
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return pluginbase.HealthcheckResult(available=True,
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reason="OK")
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else:
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if not os.path.exists(path):
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return pluginbase.HealthcheckResult(available=True,
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reason="OK")
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else:
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return pluginbase.HealthcheckResult(available=False,
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reason="DISABLED BY FILE")
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class DisableByFileHealthcheck(pluginbase.HealthcheckBaseExtension):
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"""DisableByFile healthcheck middleware plugin
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This plugin checks presence of a file to report if the service
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is unavailable or not.
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Example of middleware configuration:
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.. code-block:: ini
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[filter:healthcheck]
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paste.filter_factory = oslo_middleware:Healthcheck.factory
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path = /healthcheck
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backends = disable_by_file
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disable_by_file_path = /var/run/nova/healthcheck_disable
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"""
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def healthcheck(self, server_port):
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path = self.conf.get('disable_by_file_path')
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if path is None:
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LOG.warning(_LW('DisableByFile healthcheck middleware enabled '
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'without disable_by_file_path set'))
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return pluginbase.HealthcheckResult(available=True,
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reason="OK")
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elif not os.path.exists(path):
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return pluginbase.HealthcheckResult(available=True,
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reason="OK")
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else:
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return pluginbase.HealthcheckResult(available=False,
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reason="DISABLED BY FILE")
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