83 lines
2.9 KiB
Python
83 lines
2.9 KiB
Python
# -*- encoding: utf-8 -*-
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#
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# Copyright © 2012 eNovance <licensing@enovance.com>
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#
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# Author: Julien Danjou <julien@danjou.info>
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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 pkg_resources
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from nova import manager
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from nova import rpc
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from ceilometer import meter
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from ceilometer import cfg
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from ceilometer import log
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LOG = log.getLogger(__name__)
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COMPUTE_PLUGIN_NAMESPACE = 'ceilometer.poll.compute'
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class AgentManager(manager.Manager):
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def init_host(self):
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self._load_plugins()
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return
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def _load_plugins(self):
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self.pollsters = []
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for ep in pkg_resources.iter_entry_points(COMPUTE_PLUGIN_NAMESPACE):
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try:
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plugin_class = ep.load()
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plugin = plugin_class()
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# FIXME(dhellmann): Currently assumes all plugins are
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# enabled when they are discovered and
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# importable. Need to add check against global
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# configuration flag and check that asks the plugin if
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# it should be enabled.
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self.pollsters.append((ep.name, plugin))
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LOG.info('loaded pollster %s:%s',
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COMPUTE_PLUGIN_NAMESPACE, ep.name)
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except Exception as err:
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LOG.warning('Failed to load pollster %s:%s',
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ep.name, err)
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LOG.exception(err)
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if not self.pollsters:
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LOG.warning('Failed to load any pollsters for %s',
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COMPUTE_PLUGIN_NAMESPACE)
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return
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def periodic_tasks(self, context, raise_on_error=False):
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"""Tasks to be run at a periodic interval."""
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for name, pollster in self.pollsters:
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try:
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LOG.info('polling %s', name)
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for c in pollster.get_counters(self, context):
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LOG.info('COUNTER: %s', c)
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msg = {
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'method': 'record_metering_data',
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'version': '1.0',
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'args': {'data': meter.meter_message_from_counter(c),
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},
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}
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rpc.cast(context, cfg.CONF.metering_topic, msg)
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rpc.cast(context,
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cfg.CONF.metering_topic + '.' + c.name,
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msg)
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except Exception as err:
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LOG.warning('Continuing after error from %s: %s', name, err)
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LOG.exception(err)
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