aodh/ceilometer/energy/kwapi.py
Doug Hellmann a10773e413 Add pollster data cache
Add a dictionary as a data cache for the pollsters,
creating it outside of the loop where they are
invoked and passing it to them. Future changesets will
include changes to the pollsters to put data in the
cache.

blueprint one-meter-per-plugin

Change-Id: Ie65526dfe65a8880ad8683b62fae62f8e7f9e69b
Signed-off-by: Doug Hellmann <doug.hellmann@dreamhost.com>
2013-07-02 18:54:00 -04:00

107 lines
3.4 KiB
Python

# -*- coding: utf-8 -*-
#
# Author: François Rossigneux <francois.rossigneux@inria.fr>
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import datetime
from keystoneclient import exceptions
import requests
from ceilometer.central import plugin
from ceilometer import counter
from ceilometer.openstack.common import log
LOG = log.getLogger(__name__)
class KwapiClient(object):
"""Kwapi API client."""
def __init__(self, url, token=None):
"""Initializes client."""
self.url = url
self.token = token
def iter_probes(self):
"""Returns a list of dicts describing all probes."""
probes_url = self.url + '/probes/'
headers = {}
if self.token is not None:
headers = {'X-Auth-Token': self.token}
request = requests.get(probes_url, headers=headers)
message = request.json
probes = message['probes']
for key, value in probes.iteritems():
probe_dict = value
probe_dict['id'] = key
yield probe_dict
class _Base(plugin.CentralPollster):
"""Base class for the Kwapi pollster, derived from CentralPollster."""
@staticmethod
def get_kwapi_client(ksclient):
"""Returns a KwapiClient configured with the proper url and token."""
endpoint = ksclient.service_catalog.url_for(service_type='energy',
endpoint_type='internalURL'
)
return KwapiClient(endpoint, ksclient.auth_token)
def iter_probes(self, ksclient):
"""Iterate over all probes."""
try:
client = self.get_kwapi_client(ksclient)
except exceptions.EndpointNotFound:
LOG.debug(_("Kwapi endpoint not found"))
return []
return client.iter_probes()
class KwapiPollster(_Base):
"""Kwapi pollster derived from the base class."""
@staticmethod
def get_counter_names():
return ['energy', 'power']
def get_counters(self, manager, cache):
"""Returns all counters."""
for probe in self.iter_probes(manager.keystone):
yield counter.Counter(
name='energy',
type=counter.TYPE_CUMULATIVE,
unit='kWh',
volume=probe['kwh'],
user_id=None,
project_id=None,
resource_id=probe['id'],
timestamp=datetime.datetime.fromtimestamp(
probe['timestamp']).isoformat(),
resource_metadata={}
)
yield counter.Counter(
name='power',
type=counter.TYPE_GAUGE,
unit='W',
volume=probe['w'],
user_id=None,
project_id=None,
resource_id=probe['id'],
timestamp=datetime.datetime.fromtimestamp(
probe['timestamp']).isoformat(),
resource_metadata={}
)