103 lines
2.9 KiB
Python
103 lines
2.9 KiB
Python
# Copyright 2016 Hewlett Packard Enterprise Development Company LP
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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_log import log as logging
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from oslo_service import loopingcall
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from oslo_utils import timeutils
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import designate.conf
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from designate import context
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from designate import objects
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from designate import plugin
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from designate.central import rpcapi as central_rpcapi
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CONF = designate.conf.CONF
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LOG = logging.getLogger(__name__)
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class HeartBeatEmitter(plugin.DriverPlugin):
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__plugin_ns__ = 'designate.heartbeat_emitter'
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__plugin_type__ = 'heartbeat_emitter'
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def __init__(self, service, status_factory=None, *args, **kwargs):
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super(HeartBeatEmitter, self).__init__()
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self._service = service
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self._hostname = CONF.host
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self._timer = loopingcall.FixedIntervalLoopingCall(
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self._emit_heartbeat
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)
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self._status_factory = status_factory
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def _get_status(self):
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if self._status_factory is not None:
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return self._status_factory()
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return True, {}, {}
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def _emit_heartbeat(self):
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"""
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Returns Status, Stats, Capabilities
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"""
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status, stats, capabilities = self._get_status()
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service_status = objects.ServiceStatus(
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service_name=self._service,
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hostname=self._hostname,
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status=status,
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stats=stats,
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capabilities=capabilities,
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heartbeated_at=timeutils.utcnow()
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)
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LOG.trace("Emitting %s", service_status)
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self._transmit(service_status)
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@abc.abstractmethod
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def _transmit(self, status):
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pass
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def start(self):
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self._timer.start(
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CONF.heartbeat_emitter.heartbeat_interval,
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stop_on_exception=False
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)
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def stop(self):
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self._timer.stop()
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class NoopEmitter(HeartBeatEmitter):
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__plugin_name__ = 'noop'
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def _transmit(self, status):
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LOG.debug(status)
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class RpcEmitter(HeartBeatEmitter):
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__plugin_name__ = 'rpc'
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def __init__(self, service, rpc_api=None, *args, **kwargs):
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super(RpcEmitter, self).__init__(service, *args, **kwargs)
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self.rpc_api = rpc_api
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def _transmit(self, status):
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admin_context = context.DesignateContext.get_admin_context()
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api = self.rpc_api or central_rpcapi.CentralAPI.get_instance()
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api.update_service_status(admin_context, status)
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