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# Copyright 2015 Hewlett-Packard Company
# (c) Copyright 2018 SUSE LLC
#
# 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.
from monascaclient import client
from monascaclient import exc
from oslo_log import log
import tenacity
from ceilometer.i18n import _
from ceilometer import keystone_client
LOG = log.getLogger(__name__)
class MonascaException(Exception):
def __init__(self, message=''):
msg = 'An exception is raised from Monasca: ' + message
super(MonascaException, self).__init__(msg)
class MonascaServiceException(Exception):
def __init__(self, message=''):
msg = 'Monasca service is unavailable: ' + message
super(MonascaServiceException, self).__init__(msg)
class MonascaInvalidParametersException(Exception):
code = 400
def __init__(self, message=''):
msg = 'Request cannot be handled by Monasca: ' + message
super(MonascaInvalidParametersException, self).__init__(msg)
class Client(object):
"""A client which gets information via python-monascaclient."""
def __init__(self, conf, parsed_url):
self.conf = conf
self._retry_interval = conf.monasca.client_retry_interval
self._max_retries = conf.monasca.client_max_retries or 1
self._enable_api_pagination = conf.monasca.enable_api_pagination
# NOTE(zqfan): There are many concurrency requests while using
# Ceilosca, to save system resource, we don't retry too many times.
if self._max_retries < 0 or self._max_retries > 10:
LOG.warning('Reduce max retries from %s to 10',
self._max_retries)
self._max_retries = 10
monasca_auth_group = conf.monasca.auth_section
session = keystone_client.get_session(conf, group=monasca_auth_group)
self._endpoint = parsed_url.netloc + parsed_url.path
LOG.info(_("monasca_client: using %s as Monasca endpoint") %
self._endpoint)
self._get_client(session)
def _get_client(self, session):
self._mon_client = client.Client(self.conf.monasca.clientapi_version,
endpoint=self._endpoint,
session=session)
def call_func(self, func, **kwargs):
"""General method for calling any Monasca API function."""
@tenacity.retry(
wait=tenacity.wait_fixed(self._retry_interval),
stop=tenacity.stop_after_attempt(self._max_retries),
retry=(tenacity.retry_if_exception_type(MonascaServiceException) |
tenacity.retry_if_exception_type(MonascaException)))
def _inner():
try:
return func(**kwargs)
except (exc.http.InternalServerError,
exc.http.ServiceUnavailable,
exc.http.BadGateway,
exc.connection.ConnectionError) as e:
LOG.exception(e)
msg = '%s: %s' % (e.__class__.__name__, e)
raise MonascaServiceException(msg)
except exc.http.HttpError as e:
LOG.exception(e)
msg = '%s: %s' % (e.__class__.__name__, e)
status_code = e.http_status
if not isinstance(status_code, int):
status_code = 500
if 400 <= status_code < 500:
raise MonascaInvalidParametersException(msg)
else:
raise MonascaException(msg)
except Exception as e:
LOG.exception(e)
msg = '%s: %s' % (e.__class__.__name__, e)
raise MonascaException(msg)
return _inner()
def metrics_create(self, **kwargs):
return self.call_func(self._mon_client.metrics.create,
**kwargs)
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