81 lines
3.0 KiB
Python
81 lines
3.0 KiB
Python
#
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# Copyright 2012 New Dream Network, LLC (DreamHost)
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#
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# Author: Doug Hellmann <doug.hellmann@dreamhost.com>
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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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"""Base class for plugins used by the central agent.
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"""
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from keystoneclient.v2_0 import client as ksclient
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from oslo.config import cfg
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from ceilometer.openstack.common.gettextutils import _
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from ceilometer.openstack.common import log
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from ceilometer import plugin
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cfg.CONF.import_opt('http_timeout', 'ceilometer.service')
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cfg.CONF.import_group('service_credentials', 'ceilometer.service')
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LOG = log.getLogger(__name__)
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class CentralPollster(plugin.PollsterBase):
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"""Base class for plugins that support the polling API."""
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def _get_keystone():
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try:
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return ksclient.Client(
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username=cfg.CONF.service_credentials.os_username,
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password=cfg.CONF.service_credentials.os_password,
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tenant_id=cfg.CONF.service_credentials.os_tenant_id,
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tenant_name=cfg.CONF.service_credentials.os_tenant_name,
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cacert=cfg.CONF.service_credentials.os_cacert,
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auth_url=cfg.CONF.service_credentials.os_auth_url,
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region_name=cfg.CONF.service_credentials.os_region_name,
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insecure=cfg.CONF.service_credentials.insecure,
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timeout=cfg.CONF.http_timeout)
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except Exception as e:
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return e
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def check_keystone(service_type=None):
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"""Decorator function to check if manager has valid keystone client.
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Also checks if the service is registered/enabled in Keystone.
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:param service_type: name of service in Keystone
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"""
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def wrapped(f):
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def func(self, *args, **kwargs):
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manager = kwargs.get('manager')
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if not manager and len(args) > 0:
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manager = args[0]
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keystone = getattr(manager, 'keystone', None)
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if not keystone:
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keystone = _get_keystone()
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if isinstance(keystone, Exception):
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LOG.error(_('Skip due to keystone error %s'),
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str(keystone) if keystone else '')
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return iter([])
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elif service_type:
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endpoints = keystone.service_catalog.get_endpoints(
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service_type=service_type)
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if not endpoints:
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LOG.warning(_('Skipping because %s service is not '
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'registered in keystone') % service_type)
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return iter([])
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return f(self, *args, **kwargs)
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return func
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return wrapped
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