77b7fae41e
In this changeset, I implemented the notification handling (Rx only) system for consuming incoming notifications, more especially the Nova ones. The notifications handlers also contain the logic which incrementally updates the Compute model. Change-Id: Ia036a5a2be6caa64b7f180de38821b57c624300c Partially-implements: blueprint cluster-model-objects-wrapper
101 lines
3.9 KiB
Python
101 lines
3.9 KiB
Python
# -*- encoding: utf-8 -*-
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# Copyright (c) 2015 b<>com
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#
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# Authors: Jean-Emile DARTOIS <jean-emile.dartois@b-com.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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"""
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This component is responsible for computing a set of potential optimization
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:ref:`Actions <action_definition>` in order to fulfill the
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:ref:`Goal <goal_definition>` of an :ref:`Audit <audit_definition>`.
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It first reads the parameters of the :ref:`Audit <audit_definition>` from the
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associated :ref:`Audit Template <audit_template_definition>` and knows the
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:ref:`Goal <goal_definition>` to achieve.
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It then selects the most appropriate :ref:`Strategy <strategy_definition>`
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depending on how Watcher was configured for this :ref:`Goal <goal_definition>`.
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The :ref:`Strategy <strategy_definition>` is then executed and generates a set
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of :ref:`Actions <action_definition>` which are scheduled in time by the
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:ref:`Watcher Planner <watcher_planner_definition>` (i.e., it generates an
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:ref:`Action Plan <action_plan_definition>`).
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See :doc:`../architecture` for more details on this component.
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"""
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from oslo_config import cfg
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from watcher.decision_engine.messaging import audit_endpoint
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from watcher.decision_engine.model.collector import manager
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CONF = cfg.CONF
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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.StrOpt('status_topic',
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default='watcher.decision.status',
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help='The topic name used for '
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'status events; this topic '
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'is used so as to notify'
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'the others components '
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'of the system'),
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cfg.ListOpt('notification_topics',
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default=['versioned_notifications', 'watcher_notifications'],
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help='The topic names from which notification events '
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'will be listened to'),
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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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]
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decision_engine_opt_group = 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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CONF.register_group(decision_engine_opt_group)
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CONF.register_opts(WATCHER_DECISION_ENGINE_OPTS, decision_engine_opt_group)
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class DecisionEngineManager(object):
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API_VERSION = '1.0'
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def __init__(self):
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self.api_version = self.API_VERSION
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self.publisher_id = CONF.watcher_decision_engine.publisher_id
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self.conductor_topic = CONF.watcher_decision_engine.conductor_topic
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self.status_topic = CONF.watcher_decision_engine.status_topic
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self.notification_topics = (
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CONF.watcher_decision_engine.notification_topics)
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self.conductor_endpoints = [audit_endpoint.AuditEndpoint]
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self.status_endpoints = []
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self.collector_manager = manager.CollectorManager()
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self.notification_endpoints = (
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self.collector_manager.get_notification_endpoints())
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