89 lines
3.4 KiB
Python
89 lines
3.4 KiB
Python
# Copyright (c) 2011 OpenStack Foundation
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# Copyright 2011, Piston Cloud Computing, Inc.
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#
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import cinderclient.exceptions
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class ServiceCatalog(object):
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"""Helper methods for dealing with a Keystone Service Catalog."""
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def __init__(self, resource_dict):
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self.catalog = resource_dict
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def get_token(self):
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return self.catalog['access']['token']['id']
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def url_for(self, attr=None, filter_value=None,
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service_type=None, endpoint_type='publicURL',
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service_name=None, volume_service_name=None):
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"""Fetch the public URL from the Compute service for
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a particular endpoint attribute. If none given, return
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the first. See tests for sample service catalog.
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"""
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matching_endpoints = []
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if 'endpoints' in self.catalog:
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# We have a bastardized service catalog. Treat it special. :/
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for endpoint in self.catalog['endpoints']:
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if not filter_value or endpoint[attr] == filter_value:
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matching_endpoints.append(endpoint)
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if not matching_endpoints:
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raise cinderclient.exceptions.EndpointNotFound()
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# We don't always get a service catalog back ...
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if 'serviceCatalog' not in self.catalog['access']:
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return None
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# Full catalog ...
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catalog = self.catalog['access']['serviceCatalog']
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for service in catalog:
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# NOTE(thingee): For backwards compatibility, if they have v2
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# enabled and the service_type is set to 'volume', go ahead and
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# accept that.
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skip_service_type_check = False
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if service_type == 'volumev2' and service['type'] == 'volume':
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version = service['endpoints'][0]['publicURL'].split('/')[3]
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if version == 'v2':
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skip_service_type_check = True
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if (not skip_service_type_check
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and service.get("type") != service_type):
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continue
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if (volume_service_name and service_type in ('volume', 'volumev2')
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and service.get('name') != volume_service_name):
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continue
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endpoints = service['endpoints']
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for endpoint in endpoints:
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if not filter_value or endpoint.get(attr) == filter_value:
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endpoint["serviceName"] = service.get("name")
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matching_endpoints.append(endpoint)
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if not matching_endpoints:
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raise cinderclient.exceptions.EndpointNotFound()
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elif len(matching_endpoints) > 1:
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try:
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eplist = [ep[attr] for ep in matching_endpoints]
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except KeyError:
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eplist = matching_endpoints
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raise cinderclient.exceptions.AmbiguousEndpoints(endpoints=eplist)
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else:
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return matching_endpoints[0][endpoint_type]
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