OpenStack Compute (Nova) Client
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python-novaclient/novaclient/service_catalog.py

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3.4 KiB

# Copyright 2011 OpenStack Foundation
# Copyright 2011, Piston Cloud Computing, Inc.
#
# All Rights Reserved.
#
# 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 novaclient.exceptions
class ServiceCatalog(object):
"""Helper methods for dealing with a Keystone Service Catalog."""
def __init__(self, resource_dict):
self.catalog = resource_dict
def get_token(self):
return self.catalog['access']['token']['id']
def get_tenant_id(self):
return self.catalog['access']['token']['tenant']['id']
def url_for(self, attr=None, filter_value=None,
service_type=None, endpoint_type='publicURL',
service_name=None, volume_service_name=None):
"""Fetch the public URL from the Compute service for
a particular endpoint attribute. If none given, return
the first. See tests for sample service catalog.
"""
matching_endpoints = []
if 'endpoints' in self.catalog:
# We have a bastardized service catalog. Treat it special. :/
for endpoint in self.catalog['endpoints']:
if not filter_value or endpoint[attr] == filter_value:
# Ignore 1.0 compute endpoints
if endpoint.get("type") == 'compute' and \
endpoint.get('versionId') in (None, '1.1', '2'):
matching_endpoints.append(endpoint)
if not matching_endpoints:
raise novaclient.exceptions.EndpointNotFound()
# We don't always get a service catalog back ...
if 'serviceCatalog' not in self.catalog['access']:
return None
# Full catalog ...
catalog = self.catalog['access']['serviceCatalog']
for service in catalog:
if service.get("type") != service_type:
continue
if (service_name and service_type == 'compute' and
service.get('name') != service_name):
continue
if (volume_service_name and service_type == 'volume' and
service.get('name') != volume_service_name):
continue
endpoints = service['endpoints']
for endpoint in endpoints:
# Ignore 1.0 compute endpoints
if (service.get("type") == 'compute' and
endpoint.get('versionId', '2') not in ('1.1', '2')):
continue
if (not filter_value or
endpoint.get(attr).lower() == filter_value.lower()):
endpoint["serviceName"] = service.get("name")
matching_endpoints.append(endpoint)
if not matching_endpoints:
raise novaclient.exceptions.EndpointNotFound()
elif len(matching_endpoints) > 1:
raise novaclient.exceptions.AmbiguousEndpoints(
endpoints=matching_endpoints)
else:
return matching_endpoints[0][endpoint_type]