f3e73866bd
- Add mappings between counter type in collectd and Ceilometer.
Previously, all counters were given "gauge" type.
Now, the following mappings are applied:
- gauge -> gauge
- derive -> delta
- absolute, counter -> cumulative
- Add unit tests
Closes-Bug: #1583301
Change-Id: I13e75fcc57ed2b44c2b9a02ee9562f70748d01c2
69 lines
2.1 KiB
Python
69 lines
2.1 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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"""Default collectd meter"""
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from __future__ import unicode_literals
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from collectd_ceilometer.settings import Config
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import logging
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LOGGER = logging.getLogger(__name__)
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class Meter(object):
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"""Default collectd meter"""
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def __init__(self, collectd):
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self._collectd = collectd
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def meter_name(self, vl):
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"""Return meter name"""
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# pylint: disable=no-self-use
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resources = [vl.plugin, vl.type]
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return '.'.join([i for i in resources if i])
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def hostname(self, vl):
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"""Get host name"""
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# pylint: disable=no-self-use
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return vl.host
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def resource_id(self, vl):
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"""Get resource ID"""
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resources = [self.hostname(vl), vl.plugin_instance, vl.type_instance]
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return '-'.join([i for i in resources if i])
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def unit(self, vl):
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"""Get meter unit"""
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# pylint: disable=no-self-use
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return Config.instance().unit(vl.plugin, vl.type)
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def sample_type(self, vl):
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"""Translate from collectd counter type to Ceilometer type"""
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types = {"gauge": "gauge",
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"derive": "delta",
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"absolute": "cumulative",
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"counter": "cumulative"}
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try:
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# get_dataset -> [('value', 'derive', 0.0, None)]
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collectd_type = self._collectd.get_dataset(str(vl.type))[0][1]
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except Exception:
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LOGGER.warning(
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"Cannot map counter type '%s': using type 'gauge'.", vl.type,
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exc_info=1)
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collectd_type = "gauge"
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return types[collectd_type]
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