Stefan Caraiman e4d1af832a Improve the get metadata logic
In case the metadata service is not found, cloudbase-init
will now continue on running, instead of throwing an exception,
thus avoiding infinite loops caused by the 'configure_host'.

Change-Id: Id7ae33817c1ec8f3a7366825ab9bcc05997477db
Closes-Bug: #1643921
2016-12-07 05:07:16 -08:00

38 lines
1.3 KiB
Python

# Copyright 2012 Cloudbase Solutions Srl
#
# 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 oslo_log import log as oslo_logging
from cloudbaseinit import conf as cloudbaseinit_conf
from cloudbaseinit import exception
from cloudbaseinit.utils import classloader
CONF = cloudbaseinit_conf.CONF
LOG = oslo_logging.getLogger(__name__)
def get_metadata_service():
# Return the first service that loads correctly
cl = classloader.ClassLoader()
for class_path in CONF.metadata_services:
service = cl.load_class(class_path)()
try:
if service.load():
return service
except Exception as ex:
LOG.error("Failed to load metadata service '%s'" % class_path)
LOG.exception(ex)
raise exception.MetadaNotFoundException("No available service found")