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# Copyright 2017 IBM
#
# 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.
from keystoneauth1 import exceptions as kse
from oslo_log import log as logging
import webob
from nova.i18n import _
from nova import utils
LOG = logging.getLogger(__name__)
def verify_project_id(context, project_id):
"""verify that a project_id exists.
This attempts to verify that a project id exists. If it does not,
an HTTPBadRequest is emitted. Also HTTPBadRequest is emitted
if Keystone identity service version 3.0 is not found.
"""
adap = utils.get_ksa_adapter(
'identity', ksa_auth=context.get_auth_plugin(),
min_version=(3, 0), max_version=(3, 'latest'))
try:
resp = adap.get('/projects/%s' % project_id)
except kse.EndpointNotFound:
LOG.error(
"Keystone identity service version 3.0 was not found. This "
"might be caused by Nova misconfiguration or Keystone "
"problems.")
msg = _("Nova was unable to find Keystone service endpoint.")
# TODO(astupnik). It may be reasonable to switch to HTTP 503
# (HTTP Service Unavailable) instead of HTTP Bad Request here.
# If proper Keystone servie is inaccessible, then technially
# this is a server side error and not an error in Nova.
raise webob.exc.HTTPBadRequest(explanation=msg)
except kse.ClientException:
# something is wrong, like there isn't a keystone v3 endpoint,
# or nova isn't configured for the interface to talk to it;
# we'll take the pass and default to everything being ok.
LOG.info("Unable to contact keystone to verify project_id")
return True
if resp:
# All is good with this 20x status
return True
elif resp.status_code == 404:
# we got access, and we know this project is not there
msg = _("Project ID %s is not a valid project.") % project_id
raise webob.exc.HTTPBadRequest(explanation=msg)
elif resp.status_code == 403:
# we don't have enough permission to verify this, so default
# to "it's ok".
LOG.info(
"Insufficient permissions for user %(user)s to verify "
"existence of project_id %(pid)s",
{"user": context.user_id, "pid": project_id})
return True
else:
LOG.warning(
"Unexpected response from keystone trying to "
"verify project_id %(pid)s - resp: %(code)s %(content)s",
{"pid": project_id,
"code": resp.status_code,
"content": resp.content})
# realize we did something wrong, but move on with a warning
return True
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