77 lines
2.7 KiB
Python
77 lines
2.7 KiB
Python
#
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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 pecan
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import wsme
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from wsme import types as wtypes
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from ceilometer.api.controllers.v2 import base
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from ceilometer.api.controllers.v2 import utils as v2_utils
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from ceilometer.i18n import _
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class AlarmCombinationRule(base.AlarmRule):
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"""Alarm Combinarion Rule
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Describe when to trigger the alarm based on combining the state of
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other alarms.
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"""
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operator = base.AdvEnum('operator', str, 'or', 'and', default='and')
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"How to combine the sub-alarms"
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alarm_ids = wsme.wsattr([wtypes.text], mandatory=True)
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"List of alarm identifiers to combine"
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@property
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def default_description(self):
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joiner = ' %s ' % self.operator
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return _('Combined state of alarms %s') % joiner.join(self.alarm_ids)
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def as_dict(self):
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return self.as_dict_from_keys(['operator', 'alarm_ids'])
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@staticmethod
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def validate(rule):
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rule.alarm_ids = sorted(set(rule.alarm_ids), key=rule.alarm_ids.index)
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if len(rule.alarm_ids) <= 1:
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raise base.ClientSideError(_('Alarm combination rule should '
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'contain at least two different '
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'alarm ids.'))
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return rule
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@staticmethod
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def validate_alarm(alarm):
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project = v2_utils.get_auth_project(
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alarm.project_id if alarm.project_id != wtypes.Unset else None)
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for id in alarm.combination_rule.alarm_ids:
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alarms = list(pecan.request.alarm_storage_conn.get_alarms(
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alarm_id=id, project=project))
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if not alarms:
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raise base.AlarmNotFound(id, project)
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@staticmethod
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def update_hook(alarm):
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# should check if there is any circle in the dependency, but for
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# efficiency reason, here only check alarm cannot depend on itself
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if alarm.alarm_id in alarm.combination_rule.alarm_ids:
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raise base.ClientSideError(
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_('Cannot specify alarm %s itself in combination rule') %
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alarm.alarm_id)
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@classmethod
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def sample(cls):
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return cls(operator='or',
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alarm_ids=['739e99cb-c2ec-4718-b900-332502355f38',
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'153462d0-a9b8-4b5b-8175-9e4b05e9b856'])
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