53bd946ff7
- Add collectd_ceilometer.ceilometer dir
- Add collectd_ceilometer.common dir
- Move test files to collectd_ceilometer/tests/{ceilometer,common}
- Add base code to collectd_ceilometer/tests
Change-Id: I5bd0a8cfe8eb55407f3d6827c0bb4b509dae8c8c
85 lines
2.4 KiB
Python
85 lines
2.4 KiB
Python
# -*- coding: utf-8 -*-
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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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"""Ceilometer collectd plugin"""
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import logging
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try:
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# pylint: disable=import-error
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import collectd
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# pylint: enable=import-error
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except ImportError:
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collectd = None # when running unit tests collectd is not avaliable
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import collectd_ceilometer
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from collectd_ceilometer.ceilometer.writer import Writer
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from collectd_ceilometer.common.logger import CollectdLogHandler
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from collectd_ceilometer.common.meters import MeterStorage
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from collectd_ceilometer.common.settings import Config
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LOGGER = logging.getLogger(__name__)
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ROOT_LOGGER = logging.getLogger(collectd_ceilometer.__name__)
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def register_plugin(collectd):
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"Bind plugin hooks to collectd and viceversa"
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config = Config.instance()
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# Setup loggging
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log_handler = CollectdLogHandler(collectd=collectd)
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log_handler.cfg = config
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ROOT_LOGGER.addHandler(log_handler)
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ROOT_LOGGER.setLevel(logging.NOTSET)
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# Creates collectd plugin instance
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instance = Plugin(collectd=collectd, config=config)
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# Register plugin callbacks
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collectd.register_config(instance.config)
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collectd.register_write(instance.write)
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collectd.register_shutdown(instance.shutdown)
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class Plugin(object):
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"""Ceilometer plugin with collectd callbacks"""
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# NOTE: this is multithreaded class
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def __init__(self, collectd, config):
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self._config = config
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self._meters = MeterStorage(collectd=collectd)
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self._writer = Writer(self._meters, config=config)
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def config(self, cfg):
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"""Configuration callback
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@param cfg configuration node provided by collectd
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"""
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self._config.read(cfg)
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def write(self, vl, data=None):
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"""Collectd write callback"""
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self._writer.write(vl, data)
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def shutdown(self):
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"""Shutdown callback"""
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LOGGER.info("SHUTDOWN")
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self._writer.flush()
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if collectd:
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register_plugin(collectd=collectd)
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