a0000e4e9a
Conver from the keystoneauth namespace to keystoneauth1. This is to ensure that is is possible to install all versions of keystoneauth side-by-side. Change-Id: Ibbaf11525980c8edb5968d8b8ee19c55094e77d8
270 lines
9.9 KiB
Python
270 lines
9.9 KiB
Python
# Copyright 2011 OpenStack Foundation
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# Copyright 2011, Piston Cloud Computing, Inc.
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# Copyright 2011 Nebula, 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 abc
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import six
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from keystoneauth1 import _utils as utils
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from keystoneauth1 import exceptions
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@six.add_metaclass(abc.ABCMeta)
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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, catalog):
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self._catalog = catalog
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def _get_endpoint_region(self, endpoint):
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return endpoint.get('region_id') or endpoint.get('region')
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@abc.abstractmethod
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def is_endpoint_type_match(self, endpoint, endpoint_type):
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"""Helper function to normalize endpoint matching across v2 and v3.
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:returns: True if the provided endpoint matches the required
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endpoint_type otherwise False.
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"""
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@staticmethod
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def normalize_endpoint_type(self, endpoint_type):
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"""Handle differences in the way v2 and v3 catalogs specify endpoint.
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Both v2 and v3 must be able to handle the endpoint style of the other.
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For example v2 must be able to handle a 'public' endpoint_type and
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v3 must be able to handle a 'publicURL' endpoint_type.
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:returns: the endpoint string in the format appropriate for this
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service catalog.
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"""
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return endpoint_type
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def get_endpoints(self, service_type=None, endpoint_type=None,
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region_name=None, service_name=None):
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"""Fetch and filter endpoints for the specified service(s).
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Returns endpoints for the specified service (or all) containing
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the specified type (or all) and region (or all) and service name.
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If there is no name in the service catalog the service_name check will
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be skipped. This allows compatibility with services that existed
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before the name was available in the catalog.
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"""
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endpoint_type = self.normalize_endpoint_type(endpoint_type)
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sc = {}
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for service in (self._catalog or []):
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try:
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st = service['type']
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except KeyError:
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continue
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if service_type and service_type != st:
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continue
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# NOTE(jamielennox): service_name is different. It is not available
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# in API < v3.3. If it is in the catalog then we enforce it, if it
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# is not then we don't because the name could be correct we just
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# don't have that information to check against.
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if service_name:
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try:
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sn = service['name']
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except KeyError:
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# assume that we're in v3.0-v3.2 and don't have the name in
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# the catalog. Skip the check.
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pass
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else:
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if service_name != sn:
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continue
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endpoints = sc.setdefault(st, [])
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for endpoint in service.get('endpoints', []):
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if (endpoint_type and not
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self.is_endpoint_type_match(endpoint, endpoint_type)):
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continue
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if (region_name and
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region_name != self._get_endpoint_region(endpoint)):
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continue
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endpoints.append(endpoint)
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return sc
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@abc.abstractmethod
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@utils.positional()
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def get_urls(self, service_type=None, endpoint_type='public',
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region_name=None, service_name=None):
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"""Fetch endpoint urls from the service catalog.
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Fetch the endpoints from the service catalog for a particular
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endpoint attribute. If no attribute is given, return the first
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endpoint of the specified type.
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:param string service_type: Service type of the endpoint.
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:param string endpoint_type: Type of endpoint.
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Possible values: public or publicURL,
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internal or internalURL, admin or
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adminURL
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:param string region_name: Region of the endpoint.
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:param string service_name: The assigned name of the service.
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:returns: tuple of urls or None (if no match found)
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"""
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raise NotImplementedError()
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@utils.positional()
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def url_for(self, service_type=None, endpoint_type='public',
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region_name=None, service_name=None):
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"""Fetch an endpoint from the service catalog.
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Fetch the specified endpoint from the service catalog for
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a particular endpoint attribute. If no attribute is given, return
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the first endpoint of the specified type.
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Valid endpoint types: `public` or `publicURL`,
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`internal` or `internalURL`,
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`admin` or 'adminURL`
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:param string service_type: Service type of the endpoint.
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:param string endpoint_type: Type of endpoint.
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:param string region_name: Region of the endpoint.
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:param string service_name: The assigned name of the service.
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"""
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if not self._catalog:
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raise exceptions.EmptyCatalog('The service catalog is empty.')
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urls = self.get_urls(service_type=service_type,
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endpoint_type=endpoint_type,
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region_name=region_name,
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service_name=service_name)
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try:
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return urls[0]
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except Exception:
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pass
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if service_name and region_name:
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msg = ('%(endpoint_type)s endpoint for %(service_type)s service '
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'named %(service_name)s in %(region_name)s region not '
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'found' %
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{'endpoint_type': endpoint_type,
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'service_type': service_type, 'service_name': service_name,
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'region_name': region_name})
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elif service_name:
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msg = ('%(endpoint_type)s endpoint for %(service_type)s service '
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'named %(service_name)s not found' %
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{'endpoint_type': endpoint_type,
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'service_type': service_type,
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'service_name': service_name})
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elif region_name:
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msg = ('%(endpoint_type)s endpoint for %(service_type)s service '
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'in %(region_name)s region not found' %
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{'endpoint_type': endpoint_type,
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'service_type': service_type, 'region_name': region_name})
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else:
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msg = ('%(endpoint_type)s endpoint for %(service_type)s service '
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'not found' %
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{'endpoint_type': endpoint_type,
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'service_type': service_type})
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raise exceptions.EndpointNotFound(msg)
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class ServiceCatalogV2(ServiceCatalog):
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"""An object for encapsulating the service catalog using raw v2 auth token
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from Keystone.
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"""
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@classmethod
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def from_token(cls, token):
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if 'access' not in token:
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raise ValueError('Invalid token format for fetching catalog')
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return cls(token['access'].get('serviceCatalog', {}))
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@staticmethod
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def normalize_endpoint_type(endpoint_type):
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if endpoint_type and 'URL' not in endpoint_type:
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endpoint_type = endpoint_type + 'URL'
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return endpoint_type
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def is_endpoint_type_match(self, endpoint, endpoint_type):
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return endpoint_type in endpoint
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@utils.positional()
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def get_urls(self, service_type=None, endpoint_type='publicURL',
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region_name=None, service_name=None):
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endpoint_type = self.normalize_endpoint_type(endpoint_type)
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sc_endpoints = self.get_endpoints(service_type=service_type,
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endpoint_type=endpoint_type,
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region_name=region_name,
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service_name=service_name)
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try:
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endpoints = sc_endpoints[service_type]
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except KeyError:
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return
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return tuple([endpoint[endpoint_type] for endpoint in endpoints])
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class ServiceCatalogV3(ServiceCatalog):
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"""An object for encapsulating the service catalog using raw v3 auth token
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from Keystone.
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"""
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@classmethod
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def from_token(cls, token):
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if 'token' not in token:
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raise ValueError('Invalid token format for fetching catalog')
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return cls(token['token'].get('catalog', {}))
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@staticmethod
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def normalize_endpoint_type(endpoint_type):
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if endpoint_type:
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endpoint_type = endpoint_type.rstrip('URL')
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return endpoint_type
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def is_endpoint_type_match(self, endpoint, endpoint_type):
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try:
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return endpoint_type == endpoint['interface']
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except KeyError:
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return False
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@utils.positional()
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def get_urls(self, service_type=None, endpoint_type='publicURL',
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region_name=None, service_name=None):
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sc_endpoints = self.get_endpoints(service_type=service_type,
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endpoint_type=endpoint_type,
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region_name=region_name,
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service_name=service_name)
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try:
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endpoints = sc_endpoints[service_type]
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except KeyError:
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return None
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return tuple([endpoint['url'] for endpoint in endpoints])
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