05d6992ad7
Provide configuration options for the three plugin sets users may want to manage (compute pollsters, central pollsters, and notification listeners). Extend the plugin API so the extension manager can ask each plugin if it should be enabled. This allows, for example, the libvirt pollster to be loaded but then recognize that it should not be used and disable itself. Addresses bug #1021350 Change-Id: I82da823845ec49c1a93272411c43073bd4954377 Signed-off-by: Doug Hellmann <doug.hellmann@dreamhost.com>
87 lines
3.1 KiB
Python
87 lines
3.1 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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from nova import manager
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from ceilometer import extension_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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OPTS = [
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cfg.ListOpt('disabled_compute_pollsters',
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default=[],
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help='list of compute agent pollsters to disable',
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),
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]
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cfg.CONF.register_opts(OPTS)
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LOG = log.getLogger(__name__)
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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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# 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.ext_manager = extension_manager.ActivatedExtensionManager(
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namespace=PLUGIN_NAMESPACE,
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disabled_names=cfg.CONF.disabled_compute_pollsters,
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)
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return
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@staticmethod
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def publish_counters_from_one_pollster(ext, manager, context, instance):
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"""Used to invoke the plugins loaded by the ExtensionManager.
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"""
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try:
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LOG.info('polling %s', ext.name)
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for c in ext.obj.get_counters(manager, instance):
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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 for %s: %s',
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ext.name, instance.id, err)
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LOG.exception(err)
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def poll_instance(self, context, instance):
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"""Poll one instance."""
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self.ext_manager.map(self.publish_counters_from_one_pollster,
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manager=self,
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context=context,
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instance=instance,
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)
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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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# FIXME(dhellmann): How do we get a list of instances without
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# talking directly to the database?
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for instance in self.db.instance_get_all_by_host(context, self.host):
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if instance['vm_state'] != 'error':
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self.poll_instance(context, instance)
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