cd96b61099
This patch add a new endpoint to the alarm API to change only the state of an alarm. And modifies the evaluator base to use this new endpoint. Implements blueprint alarming-logical-combination Change-Id: I8bff74f0686ba17103ee63bcbdb0830c8273596f
83 lines
2.7 KiB
Python
83 lines
2.7 KiB
Python
# -*- encoding: utf-8 -*-
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#
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# Copyright © 2013 eNovance <licensing@enovance.com>
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#
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# Authors: Mehdi Abaakouk <mehdi.abaakouk@enovance.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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import abc
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from oslo.config import cfg
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from ceilometerclient import client as ceiloclient
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from ceilometer.openstack.common import log
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from ceilometer.openstack.common.gettextutils import _
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LOG = log.getLogger(__name__)
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UNKNOWN = 'insufficient data'
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OK = 'ok'
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ALARM = 'alarm'
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class Evaluator(object):
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"""Base class for alarm rule evaluator plugins."""
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__metaclass__ = abc.ABCMeta
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def __init__(self, notifier):
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self.notifier = notifier
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self.api_client = None
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@property
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def _client(self):
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"""Construct or reuse an authenticated API client."""
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if not self.api_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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cacert=auth_config.os_cacert,
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endpoint_type=auth_config.os_endpoint_type,
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)
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self.api_client = ceiloclient.get_client(2, **creds)
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return self.api_client
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def _refresh(self, alarm, state, reason):
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"""Refresh alarm state."""
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try:
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previous = alarm.state
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if previous != state:
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LOG.info(_('alarm %(id)s transitioning to %(state)s because '
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'%(reason)s') % {'id': alarm.alarm_id,
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'state': state,
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'reason': reason})
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self._client.alarms.set_state(alarm.alarm_id, state=state)
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alarm.state = state
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if self.notifier:
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self.notifier.notify(alarm, previous, reason)
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except Exception:
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# retry will occur naturally on the next evaluation
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# cycle (unless alarm state reverts in the meantime)
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LOG.exception(_('alarm state update failed'))
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@abc.abstractmethod
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def evaluate(self, alarm):
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pass
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