566a830f64
hacking 3.0.x is quite old. Bump it to the current latest version. Change-Id: I8d87fed6afe5988678c64090af261266d1ca20e6
89 lines
3.2 KiB
Python
89 lines
3.2 KiB
Python
# -*- encoding: utf-8 -*-
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# Copyright (c) 2019 European Organization for Nuclear Research (CERN)
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#
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# Authors: Corne Lukken <info@dantalion.nl>
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from oslo_config import cfg
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from oslo_log import log
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from oslo_serialization import jsonutils
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from watcher.common import exception
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from watcher.decision_engine.datasources.grafana_translator.base import \
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BaseGrafanaTranslator
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CONF = cfg.CONF
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LOG = log.getLogger(__name__)
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class InfluxDBGrafanaTranslator(BaseGrafanaTranslator):
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"""Grafana translator to communicate with InfluxDB database"""
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NAME = 'influxdb'
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def __init__(self, data):
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super(InfluxDBGrafanaTranslator, self).__init__(data)
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def build_params(self):
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""""""
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data = self._data
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retention_period = None
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available_periods = CONF.grafana_translators.retention_periods.items()
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for key, value in sorted(available_periods, key=lambda x: x[1]):
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if int(data['period']) < int(value):
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retention_period = key
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break
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if retention_period is None:
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retention_period = max(available_periods)[0]
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LOG.warning("Longest retention period is to short for desired"
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" period")
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try:
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resource = self._extract_attribute(
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data['resource'], data['attribute'])
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except AttributeError:
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LOG.error("Resource: %s does not contain attribute %s",
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data['resource'], data['attribute'])
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raise
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# Granularity is optional if it is None the minimal value for InfluxDB
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# will be 1
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granularity = \
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data['granularity'] if data['granularity'] is not None else 1
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return {'db': data['db'],
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'epoch': 'ms',
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'q': self._query_format(
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data['query'], data['aggregate'], resource, data['period'],
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granularity, retention_period)}
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def extract_result(self, raw_results):
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""""""
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try:
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# For result structure see:
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# https://docs.openstack.org/watcher/latest/datasources/grafana.html#InfluxDB
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result = jsonutils.loads(raw_results)
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result = result['results'][0]['series'][0]
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index_aggregate = result['columns'].index(self._data['aggregate'])
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return result['values'][0][index_aggregate]
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except KeyError:
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LOG.error("Could not extract %s for the resource: %s",
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self._data['metric'], self._data['resource'])
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raise exception.NoSuchMetricForHost(
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metric=self._data['metric'], host=self._data['resource'])
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