179 lines
6.8 KiB
Python
179 lines
6.8 KiB
Python
# Copyright 2015 Huawei Technologies Co., Ltd.
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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"); you may
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# not use this file except in compliance with the License. You may obtain
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# 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, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import collections
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from keystoneauth1 import loading
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from keystoneauth1 import session
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from keystoneclient.v3 import client as keystone_client
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from oslo_config import cfg
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from oslo_log import log as logging
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from dcorch.common import consts
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LOG = logging.getLogger(__name__)
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class EndpointCache(object):
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def __init__(self, region_name=None, auth_url=None):
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self.endpoint_map = collections.defaultdict(dict)
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self.admin_session = None
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self.keystone_client = None
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# if auth_url is provided use that otherwise use the one
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# defined in the config
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if auth_url:
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self.external_auth_url = auth_url
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else:
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self.external_auth_url = cfg.CONF.cache.auth_uri
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self._initialize_keystone_client(region_name, auth_url)
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self._update_endpoints()
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def _initialize_keystone_client(self, region_name=None, auth_url=None):
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loader = loading.get_plugin_loader(
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cfg.CONF.keystone_authtoken.auth_type)
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auth = loader.load_from_options(
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auth_url=self.external_auth_url,
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username=cfg.CONF.cache.admin_username,
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user_domain_name=cfg.CONF.cache.admin_user_domain_name,
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password=cfg.CONF.cache.admin_password,
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project_name=cfg.CONF.cache.admin_tenant,
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project_domain_name=cfg.CONF.cache.admin_project_domain_name,
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)
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self.admin_session = session.Session(
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auth=auth, additional_headers=consts.USER_HEADER)
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self.keystone_client = keystone_client.Client(
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session=self.admin_session,
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region_name=consts.VIRTUAL_MASTER_CLOUD)
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# if Endpoint cache is intended for a subcloud then
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# we need to retrieve the subcloud token and session.
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# Skip this if auth_url was provided as its assumed that the
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# auth_url would correspond to a subcloud so session was
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# set up above
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if (not auth_url and region_name and
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region_name not in
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[consts.CLOUD_0, consts.VIRTUAL_MASTER_CLOUD]):
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identity_service = self.keystone_client.services.list(
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name='keystone', type='identity')
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sc_auth_url = self.keystone_client.endpoints.list(
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service=identity_service[0].id,
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interface=consts.KS_ENDPOINT_INTERNAL,
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region=region_name)
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try:
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sc_auth_url = sc_auth_url[0].url
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except IndexError:
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LOG.error("Cannot find identity auth_url for %s", region_name)
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raise
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sc_loader = loading.get_plugin_loader(
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cfg.CONF.keystone_authtoken.auth_type)
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# We assume that the Admin user names and passwords are the same
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# on this subcloud since this is an audited resource
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sc_auth = sc_loader.load_from_options(
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auth_url=sc_auth_url,
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username=cfg.CONF.cache.admin_username,
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user_domain_name=cfg.CONF.cache.admin_user_domain_name,
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password=cfg.CONF.cache.admin_password,
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project_name=cfg.CONF.cache.admin_tenant,
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project_domain_name=cfg.CONF.cache.admin_project_domain_name,
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)
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self.admin_session = session.Session(
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auth=sc_auth, additional_headers=consts.USER_HEADER)
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self.keystone_client = keystone_client.Client(
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session=self.admin_session,
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region_name=region_name)
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self.external_auth_url = sc_auth_url
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@staticmethod
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def _get_endpoint_from_keystone(self):
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service_id_name_map = {}
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for service in self.keystone_client.services.list():
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service_dict = service.to_dict()
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service_id_name_map[service_dict['id']] = service_dict['name']
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region_service_endpoint_map = {}
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for endpoint in self.keystone_client.endpoints.list():
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endpoint_dict = endpoint.to_dict()
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if endpoint_dict['interface'] != consts.KS_ENDPOINT_INTERNAL:
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continue
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region_id = endpoint_dict['region']
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service_id = endpoint_dict['service_id']
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url = endpoint_dict['url']
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service_name = service_id_name_map[service_id]
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if region_id not in region_service_endpoint_map:
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region_service_endpoint_map[region_id] = {}
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region_service_endpoint_map[region_id][service_name] = url
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return region_service_endpoint_map
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def _get_endpoint(self, region, service, retry):
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if service not in self.endpoint_map[region]:
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if retry:
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self.update_endpoints()
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return self._get_endpoint(region, service, False)
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else:
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return ''
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else:
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return self.endpoint_map[region][service]
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def _update_endpoints(self):
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endpoint_map = EndpointCache._get_endpoint_from_keystone(self)
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for region in endpoint_map:
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for service in endpoint_map[region]:
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self.endpoint_map[region][
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service] = endpoint_map[region][service]
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def get_endpoint(self, region, service):
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"""Get service endpoint url.
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:param region: region the service belongs to
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:param service: service type
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:return: url of the service
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"""
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return self._get_endpoint(region, service, True)
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def update_endpoints(self):
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"""Update endpoint cache from Keystone.
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:return: None
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"""
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self._update_endpoints()
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def get_all_regions(self):
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"""Get region list.
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return: List of regions
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"""
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return list(self.endpoint_map.keys())
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def get_session_from_token(self, token, project_id):
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"""Get session based on token to communicate with openstack services.
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:param token: token with which the request is triggered.
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:param project_id: UUID of the project.
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:return: session object.
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"""
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loader = loading.get_plugin_loader('token')
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auth = loader.load_from_options(auth_url=self.external_auth_url,
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token=token, project_id=project_id)
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sess = session.Session(auth=auth)
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return sess
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