5de8c6fce5
1. Change the pollster's interface to support resources: - Added optional parameter 'resources' to the method get_samples. It specifies a list of the endpoints from which the pollster would get data. 2. Change the PollingTask to record the resources for each pollster. 3. Pass the resources recorded in PollingTask to the pollsters in central agent. This patch only changes the interface of pollsters and PollingTask in central agent. The existing central agent's pollsters still ignore the resources passed in by the PollingTask. Implements: blueprint support-resources-pipeline-item Change-Id: Ic7a83c63ea291d0527004113bc8d8bb09311d14f
120 lines
3.9 KiB
Python
120 lines
3.9 KiB
Python
# -*- coding: utf-8 -*-
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#
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# Author: François Rossigneux <francois.rossigneux@inria.fr>
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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 datetime
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from keystoneclient import exceptions
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from oslo.config import cfg
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import requests
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from ceilometer.central import plugin
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from ceilometer.openstack.common.gettextutils import _ # noqa
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from ceilometer.openstack.common import log
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from ceilometer import sample
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LOG = log.getLogger(__name__)
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class KwapiClient(object):
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"""Kwapi API client."""
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def __init__(self, url, token=None):
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"""Initializes client."""
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self.url = url
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self.token = token
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def iter_probes(self):
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"""Returns a list of dicts describing all probes."""
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probes_url = self.url + '/probes/'
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headers = {}
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if self.token is not None:
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headers = {'X-Auth-Token': self.token}
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request = requests.get(probes_url, headers=headers)
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message = request.json()
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probes = message['probes']
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for key, value in probes.iteritems():
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probe_dict = value
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probe_dict['id'] = key
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yield probe_dict
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class _Base(plugin.CentralPollster):
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"""Base class for the Kwapi pollster, derived from CentralPollster."""
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@staticmethod
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def get_kwapi_client(ksclient):
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"""Returns a KwapiClient configured with the proper url and token."""
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endpoint = ksclient.service_catalog.url_for(
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service_type='energy',
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endpoint_type=cfg.CONF.service_credentials.os_endpoint_type)
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return KwapiClient(endpoint, ksclient.auth_token)
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CACHE_KEY_PROBE = 'kwapi.probes'
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def _iter_probes(self, ksclient, cache):
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"""Iterate over all probes."""
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if self.CACHE_KEY_PROBE not in cache:
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cache[self.CACHE_KEY_PROBE] = self._get_probes(ksclient)
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return iter(cache[self.CACHE_KEY_PROBE])
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def _get_probes(self, ksclient):
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try:
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client = self.get_kwapi_client(ksclient)
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except exceptions.EndpointNotFound:
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LOG.debug(_("Kwapi endpoint not found"))
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return []
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return list(client.iter_probes())
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class EnergyPollster(_Base):
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"""Measures energy consumption."""
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def get_samples(self, manager, cache, resources=[]):
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"""Returns all samples."""
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for probe in self._iter_probes(manager.keystone, cache):
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yield sample.Sample(
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name='energy',
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type=sample.TYPE_CUMULATIVE,
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unit='kWh',
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volume=probe['kwh'],
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user_id=None,
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project_id=None,
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resource_id=probe['id'],
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timestamp=datetime.datetime.fromtimestamp(
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probe['timestamp']).isoformat(),
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resource_metadata={}
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)
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class PowerPollster(_Base):
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"""Measures power consumption."""
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def get_samples(self, manager, cache, resources=[]):
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"""Returns all samples."""
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for probe in self._iter_probes(manager.keystone, cache):
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yield sample.Sample(
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name='power',
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type=sample.TYPE_GAUGE,
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unit='W',
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volume=probe['w'],
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user_id=None,
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project_id=None,
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resource_id=probe['id'],
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timestamp=datetime.datetime.fromtimestamp(
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probe['timestamp']).isoformat(),
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resource_metadata={}
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)
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