99373ff459
A skeleton service for singleton threshold evaluation of alarms (i.e. with trivial global partitioning). Change-Id: I6081ac92b04ecffa1fb8783c36e9fe12004c2129
91 lines
2.9 KiB
Python
91 lines
2.9 KiB
Python
# -*- encoding: utf-8 -*-
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#
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# Copyright © 2013 Red Hat, Inc
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#
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# Author: Eoghan Glynn <eglynn@redhat.com>
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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.config import cfg
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from stevedore import extension
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from ceilometer.service import prepare_service
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from ceilometer.openstack.common import log
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from ceilometer.openstack.common import service as os_service
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from ceilometerclient import client as ceiloclient
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OPTS = [
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cfg.IntOpt('threshold_evaluation_interval',
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default=60,
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help='Period of threshold evaluation cycle, should'
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' be >= than configured pipeline interval for'
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' collection of underlying metrics.'),
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]
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cfg.CONF.register_opts(OPTS, group='alarm')
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LOG = log.getLogger(__name__)
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class SingletonAlarmService(os_service.Service):
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ALARM_NAMESPACE = 'ceilometer.alarm'
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def __init__(self):
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super(SingletonAlarmService, self).__init__()
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self.extension_manager = extension.ExtensionManager(
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namespace=self.ALARM_NAMESPACE,
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invoke_on_load=True,
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)
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def start(self):
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super(SingletonAlarmService, self).start()
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for ext in self.extension_manager.extensions:
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if ext.name == 'threshold_eval':
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self.threshold_eval = ext.obj
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interval = cfg.CONF.alarm.threshold_evaluation_interval
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args = [ext.obj, self._client()]
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self.tg.add_timer(
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interval,
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self._evaluate_all_alarms,
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0,
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*args)
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break
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# Add a dummy thread to have wait() working
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self.tg.add_timer(604800, lambda: None)
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@staticmethod
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def _client():
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auth_config = cfg.CONF.service_credentials
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creds = dict(
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os_auth_url=auth_config.os_auth_url,
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os_tenant_name=auth_config.os_tenant_name,
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os_password=auth_config.os_password,
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os_username=auth_config.os_username
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)
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return ceiloclient.get_client(2, **creds)
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@staticmethod
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def _evaluate_all_alarms(threshold_eval, api_client):
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try:
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alarms = api_client.alarms.list()
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threshold_eval.assign_alarms(alarms)
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threshold_eval.evaluate()
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except Exception:
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LOG.exception(_('threshold evaluation cycle failed'))
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def singleton_alarm():
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prepare_service()
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os_service.launch(SingletonAlarmService()).wait()
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