Source code for ceilometer.central.plugin

#
# Copyright 2012 New Dream Network, LLC (DreamHost)
#
# Author: Doug Hellmann <doug.hellmann@dreamhost.com>
#
# 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.
"""Base class for plugins used by the central agent.
"""
from keystoneclient.v2_0 import client as ksclient
from oslo.config import cfg

from ceilometer.openstack.common.gettextutils import _
from ceilometer.openstack.common import log
from ceilometer import plugin

cfg.CONF.import_opt('http_timeout', 'ceilometer.service')
cfg.CONF.import_group('service_credentials', 'ceilometer.service')

LOG = log.getLogger(__name__)


[docs]class CentralPollster(plugin.PollsterBase): """Base class for plugins that support the polling API."""
def _get_keystone(): try: return ksclient.Client( username=cfg.CONF.service_credentials.os_username, password=cfg.CONF.service_credentials.os_password, tenant_id=cfg.CONF.service_credentials.os_tenant_id, tenant_name=cfg.CONF.service_credentials.os_tenant_name, cacert=cfg.CONF.service_credentials.os_cacert, auth_url=cfg.CONF.service_credentials.os_auth_url, region_name=cfg.CONF.service_credentials.os_region_name, insecure=cfg.CONF.service_credentials.insecure, timeout=cfg.CONF.http_timeout) except Exception as e: return e def check_keystone(service_type=None): """Decorator function to check if manager has valid keystone client. Also checks if the service is registered/enabled in Keystone. :param service_type: name of service in Keystone """ def wrapped(f): def func(self, *args, **kwargs): manager = kwargs.get('manager') if not manager and len(args) > 0: manager = args[0] keystone = getattr(manager, 'keystone', None) if not keystone: keystone = _get_keystone() if isinstance(keystone, Exception): LOG.error(_('Skip due to keystone error %s'), str(keystone) if keystone else '') return iter([]) elif service_type: endpoints = keystone.service_catalog.get_endpoints( service_type=service_type) if not endpoints: LOG.warning(_('Skipping because %s service is not ' 'registered in keystone') % service_type) return iter([]) return f(self, *args, **kwargs) return func return wrapped