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# Copyright 2012-2013 OpenStack Foundation
#
# 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.
#
"""Manage access to the clients, including authenticating when needed."""
import logging
import pkg_resources
import sys
from keystoneclient.auth.identity import v2 as v2_auth
from keystoneclient.auth.identity import v3 as v3_auth
from keystoneclient import session
from openstackclient.identity import client as identity_client
LOG = logging.getLogger(__name__)
class ClientCache(object):
"""Descriptor class for caching created client handles."""
def __init__(self, factory):
self.factory = factory
self._handle = None
def __get__(self, instance, owner):
# Tell the ClientManager to login to keystone
if self._handle is None:
self._handle = self.factory(instance)
return self._handle
class ClientManager(object):
"""Manages access to API clients, including authentication."""
identity = ClientCache(identity_client.make_client)
def __init__(self, token=None, url=None, auth_url=None,
domain_id=None, domain_name=None,
project_name=None, project_id=None,
username=None, password=None,
user_domain_id=None, user_domain_name=None,
project_domain_id=None, project_domain_name=None,
region_name=None, api_version=None, verify=True,
trust_id=None, timing=None):
self._token = token
self._url = url
self._auth_url = auth_url
self._domain_id = domain_id
self._domain_name = domain_name
self._project_name = project_name
self._project_id = project_id
self._username = username
self._password = password
self._user_domain_id = user_domain_id
self._user_domain_name = user_domain_name
self._project_domain_id = project_domain_id
self._project_domain_name = project_domain_name
self._region_name = region_name
self._api_version = api_version
self._trust_id = trust_id
self._service_catalog = None
self.timing = timing
# verify is the Requests-compatible form
self._verify = verify
# also store in the form used by the legacy client libs
self._cacert = None
if verify is True or verify is False:
self._insecure = not verify
else:
self._cacert = verify
self._insecure = False
ver_prefix = identity_client.AUTH_VERSIONS[
self._api_version[identity_client.API_NAME]
]
# Get logging from root logger
root_logger = logging.getLogger('')
LOG.setLevel(root_logger.getEffectiveLevel())
# NOTE(dtroyer): These plugins are hard-coded for the first step
# in using the new Keystone auth plugins.
if self._url:
LOG.debug('Using token auth %s', ver_prefix)
if ver_prefix == 'v2':
self.auth = v2_auth.Token(
auth_url=url,
token=token,
)
else:
self.auth = v3_auth.Token(
auth_url=url,
token=token,
)
else:
LOG.debug('Using password auth %s', ver_prefix)
if ver_prefix == 'v2':
self.auth = v2_auth.Password(
auth_url=auth_url,
username=username,
password=password,
trust_id=trust_id,
tenant_id=project_id,
tenant_name=project_name,
)
else:
self.auth = v3_auth.Password(
auth_url=auth_url,
username=username,
password=password,
trust_id=trust_id,
user_domain_id=user_domain_id,
user_domain_name=user_domain_name,
domain_id=domain_id,
domain_name=domain_name,
project_id=project_id,
project_name=project_name,
project_domain_id=project_domain_id,
project_domain_name=project_domain_name,
)
self.session = session.Session(
auth=self.auth,
verify=verify,
)
self.auth_ref = None
if not self._url:
# Trigger the auth call
self.auth_ref = self.session.auth.get_auth_ref(self.session)
# Populate other password flow attributes
self._token = self.session.auth.get_token(self.session)
self._service_catalog = self.auth_ref.service_catalog
return
def get_endpoint_for_service_type(self, service_type):
"""Return the endpoint URL for the service type."""
# See if we are using password flow auth, i.e. we have a
# service catalog to select endpoints from
if self._service_catalog:
endpoint = self._service_catalog.url_for(
service_type=service_type)
else:
# Hope we were given the correct URL.
endpoint = self._url
return endpoint
def get_extension_modules(group):
"""Add extension clients"""
mod_list = []
for ep in pkg_resources.iter_entry_points(group):
LOG.debug('found extension %r', ep.name)
__import__(ep.module_name)
module = sys.modules[ep.module_name]
mod_list.append(module)
init_func = getattr(module, 'Initialize', None)
if init_func:
init_func('x')
setattr(
ClientManager,
module.API_NAME,
ClientCache(
getattr(sys.modules[ep.module_name], 'make_client', None)
),
)
return mod_list
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