3cdac9f3d0
The meter signing and publishing code was tightly coupled to the global configuration object, making it more difficult to reuse in an outside project. This change adds arguments for the configuration settings actually being used in those libraries and moves use of the global configuration object higher up the stack to the manager. It also organizes the definition of the options related to signing and publishing metering messages so they can more easily by registered on other configuration objects. Change-Id: I8b1df0f228d0c2658841c4b7f7f4527414efc9a6 Signed-off-by: Doug Hellmann <doug.hellmann@dreamhost.com>
76 lines
2.7 KiB
Python
76 lines
2.7 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 ceilometer.openstack.common import cfg
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from ceilometer.openstack.common import log
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from ceilometer import publish
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LOG = log.getLogger(__name__)
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PLUGIN_NAMESPACE = 'ceilometer.poll.central'
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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(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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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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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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publish.publish_counter(context, c,
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cfg.CONF.metering_topic,
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cfg.CONF.metering_secret,
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)
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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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