b620081714
Override the metric map of each datasource as soon as it is created by the manager. This override comes from a file whose path is provided by a setting in config file. Loading at creation time allows the correct datasource be used when get_backend is called, this allows loading a datasource whose metric names get updated outside the watcher's codebase. The function 'load_metric_map' returns empty-dict in any error case. Also in case the file is empty where safe_load is unable finds any yaml documents, it will return None. [1] Some minor refactoring in the test_manager file for readability and added tests for file load and metric override. 1 - https://pyyaml.org/wiki/PyYAMLDocumentation Change-Id: I1df16245f4c7dfd34066f3ab0553cd67154faa58 Implements: blueprint file-based-metric-map
92 lines
3.8 KiB
Python
92 lines
3.8 KiB
Python
# -*- encoding: utf-8 -*-
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# Copyright (c) 2015 Intel Corp
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#
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# Authors: Prudhvi Rao Shedimbi <prudhvi.rao.shedimbi@intel.com>
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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
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# 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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from oslo_config import cfg
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watcher_decision_engine = cfg.OptGroup(name='watcher_decision_engine',
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title='Defines the parameters of '
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'the module decision engine')
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WATCHER_DECISION_ENGINE_OPTS = [
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cfg.StrOpt('conductor_topic',
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default='watcher.decision.control',
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help='The topic name used for '
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'control events, this topic '
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'used for RPC calls'),
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cfg.ListOpt('notification_topics',
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default=['nova.versioned_notifications',
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'watcher.watcher_notifications'],
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help='The exchange and topic names from which '
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'notification events will be listened to. '
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'The exchange should be specified to get '
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'an ability to use pools.'),
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cfg.StrOpt('publisher_id',
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default='watcher.decision.api',
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help='The identifier used by the Watcher '
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'module on the message broker'),
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cfg.IntOpt('max_workers',
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default=2,
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required=True,
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help='The maximum number of threads that can be used to '
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'execute strategies'),
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cfg.IntOpt('action_plan_expiry',
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default=24,
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mutable=True,
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help='An expiry timespan(hours). Watcher invalidates any '
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'action plan for which its creation time '
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'-whose number of hours has been offset by this value-'
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' is older that the current time.'),
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cfg.IntOpt('check_periodic_interval',
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default=30 * 60,
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mutable=True,
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help='Interval (in seconds) for checking action plan expiry.'),
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cfg.StrOpt('metric_map_path',
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default='/etc/watcher/metric_map.yaml',
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help='Path to metric map yaml formatted file. '
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' '
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'The file contains a map per datasource whose keys '
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'are the metric names as recognized by watcher and the '
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'value is the real name of the metric in the datasource. '
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'For example:: \n\n'
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' monasca:\n'
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' instance_cpu_usage: VM_CPU\n'
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' gnocchi:\n'
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' instance_cpu_usage: cpu_vm_util\n\n'
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'This file is optional.')]
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WATCHER_CONTINUOUS_OPTS = [
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cfg.IntOpt('continuous_audit_interval',
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default=10,
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mutable=True,
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help='Interval (in seconds) for checking newly created '
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'continuous audits.')
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]
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def register_opts(conf):
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conf.register_group(watcher_decision_engine)
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conf.register_opts(WATCHER_DECISION_ENGINE_OPTS,
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group=watcher_decision_engine)
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conf.register_opts(WATCHER_CONTINUOUS_OPTS, group=watcher_decision_engine)
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def list_opts():
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return [('watcher_decision_engine', WATCHER_DECISION_ENGINE_OPTS),
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('watcher_decision_engine', WATCHER_CONTINUOUS_OPTS)]
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