106 lines
3.5 KiB
Python
106 lines
3.5 KiB
Python
"""Manage access to the clients, including authenticating when needed.
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"""
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import logging
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from openstackclient.common import exceptions as exc
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from openstackclient.compute import client as compute_client
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from openstackclient.identity import client as identity_client
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LOG = logging.getLogger(__name__)
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class ClientCache(object):
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"""Descriptor class for caching created client handles.
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"""
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def __init__(self, factory):
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self.factory = factory
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self._handle = None
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def __get__(self, instance, owner):
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# Tell the ClientManager to login to keystone
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if self._handle is None:
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instance.init_token()
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self._handle = self.factory(instance)
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return self._handle
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class ClientManager(object):
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"""Manages access to API clients, including authentication.
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"""
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# Identity client is instantiated in init_token()
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# otherwise we have a recursion problem
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identity = None
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compute = ClientCache(compute_client.make_client)
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def __init__(self, token=None, url=None,
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auth_url=None,
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tenant_name=None, tenant_id=None,
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username=None, password=None,
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region_name=None,
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identity_api_version=None,
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compute_api_version=None,
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image_api_version=None,
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):
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self._token = token
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self._url = url
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self._auth_url = auth_url
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self._tenant_name = tenant_name
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self._tenant_id = tenant_id
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self._username = username
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self._password = password
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self._region_name = region_name
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self._identity_api_version = identity_api_version
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self._compute_api_version = compute_api_version
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self._image_api_version = image_api_version
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def init_token(self):
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"""Return the auth token and endpoint.
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"""
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if self._token:
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LOG.debug('using existing auth token')
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return
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LOG.debug('validating authentication options')
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if not self._username:
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raise exc.CommandError(
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"You must provide a username via"
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" either --os-username or env[OS_USERNAME]")
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if not self._password:
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raise exc.CommandError(
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"You must provide a password via"
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" either --os-password or env[OS_PASSWORD]")
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if not (self._tenant_id or self._tenant_name):
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raise exc.CommandError(
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"You must provide a tenant_id via"
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" either --os-tenant-id or via env[OS_TENANT_ID]")
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if not self._auth_url:
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raise exc.CommandError(
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"You must provide an auth url via"
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" either --os-auth-url or via env[OS_AUTH_URL]")
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# Get an Identity client and keep a token and catalog
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if not self.identity:
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self.identity = identity_client.make_client(self)
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self._token = self.identity.auth_token
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self._service_catalog = self.identity.service_catalog
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return
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def get_endpoint_for_service_type(self, service_type):
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"""Return the endpoint URL for the service type.
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"""
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# See if we are using password flow auth, i.e. we have a
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# service catalog to select endpoints from
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if self._service_catalog:
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endpoint = self._service_catalog.url_for(
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service_type=service_type)
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else:
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# Hope we were given the correct URL.
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endpoint = self._url
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return endpoint
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