152 lines
6.3 KiB
Python
152 lines
6.3 KiB
Python
# Copyright 2011 OpenStack Foundation
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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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from webob import exc
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from nova.api.openstack import common
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from nova.api.openstack.compute.schemas import server_metadata
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from nova.api.openstack import wsgi
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from nova.api import validation
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from nova.compute import api as compute
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from nova import exception
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from nova.i18n import _
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from nova.policies import server_metadata as sm_policies
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class ServerMetadataController(wsgi.Controller):
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"""The server metadata API controller for the OpenStack API."""
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def __init__(self):
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super(ServerMetadataController, self).__init__()
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self.compute_api = compute.API()
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def _get_metadata(self, context, server_id):
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server = common.get_instance(self.compute_api, context, server_id)
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try:
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# NOTE(mikal): get_instance_metadata sometimes returns
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# InstanceNotFound in unit tests, even though the instance is
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# fetched on the line above. I blame mocking.
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meta = self.compute_api.get_instance_metadata(context, server)
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except exception.InstanceNotFound:
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msg = _('Server does not exist')
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raise exc.HTTPNotFound(explanation=msg)
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meta_dict = {}
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for key, value in meta.items():
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meta_dict[key] = value
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return meta_dict
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@wsgi.expected_errors(404)
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def index(self, req, server_id):
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"""Returns the list of metadata for a given instance."""
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context = req.environ['nova.context']
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context.can(sm_policies.POLICY_ROOT % 'index')
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return {'metadata': self._get_metadata(context, server_id)}
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@wsgi.expected_errors((403, 404, 409))
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# NOTE(gmann): Returns 200 for backwards compatibility but should be 201
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# as this operation complete the creation of metadata.
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@validation.schema(server_metadata.create)
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def create(self, req, server_id, body):
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metadata = body['metadata']
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context = req.environ['nova.context']
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context.can(sm_policies.POLICY_ROOT % 'create')
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new_metadata = self._update_instance_metadata(context,
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server_id,
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metadata,
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delete=False)
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return {'metadata': new_metadata}
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@wsgi.expected_errors((400, 403, 404, 409))
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@validation.schema(server_metadata.update)
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def update(self, req, server_id, id, body):
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context = req.environ['nova.context']
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context.can(sm_policies.POLICY_ROOT % 'update')
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meta_item = body['meta']
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if id not in meta_item:
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expl = _('Request body and URI mismatch')
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raise exc.HTTPBadRequest(explanation=expl)
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self._update_instance_metadata(context,
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server_id,
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meta_item,
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delete=False)
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return {'meta': meta_item}
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@wsgi.expected_errors((403, 404, 409))
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@validation.schema(server_metadata.update_all)
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def update_all(self, req, server_id, body):
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context = req.environ['nova.context']
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context.can(sm_policies.POLICY_ROOT % 'update_all')
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metadata = body['metadata']
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new_metadata = self._update_instance_metadata(context,
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server_id,
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metadata,
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delete=True)
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return {'metadata': new_metadata}
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def _update_instance_metadata(self, context, server_id, metadata,
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delete=False):
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server = common.get_instance(self.compute_api, context, server_id)
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try:
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return self.compute_api.update_instance_metadata(context,
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server,
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metadata,
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delete)
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except exception.QuotaError as error:
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raise exc.HTTPForbidden(explanation=error.format_message())
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except exception.InstanceIsLocked as e:
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raise exc.HTTPConflict(explanation=e.format_message())
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except exception.InstanceInvalidState as state_error:
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common.raise_http_conflict_for_instance_invalid_state(state_error,
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'update metadata', server_id)
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@wsgi.expected_errors(404)
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def show(self, req, server_id, id):
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"""Return a single metadata item."""
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context = req.environ['nova.context']
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context.can(sm_policies.POLICY_ROOT % 'show')
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data = self._get_metadata(context, server_id)
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try:
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return {'meta': {id: data[id]}}
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except KeyError:
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msg = _("Metadata item was not found")
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raise exc.HTTPNotFound(explanation=msg)
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@wsgi.expected_errors((404, 409))
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@wsgi.response(204)
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def delete(self, req, server_id, id):
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"""Deletes an existing metadata."""
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context = req.environ['nova.context']
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context.can(sm_policies.POLICY_ROOT % 'delete')
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metadata = self._get_metadata(context, server_id)
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if id not in metadata:
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msg = _("Metadata item was not found")
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raise exc.HTTPNotFound(explanation=msg)
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server = common.get_instance(self.compute_api, context, server_id)
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try:
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self.compute_api.delete_instance_metadata(context, server, id)
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except exception.InstanceIsLocked as e:
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raise exc.HTTPConflict(explanation=e.format_message())
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except exception.InstanceInvalidState as state_error:
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common.raise_http_conflict_for_instance_invalid_state(state_error,
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'delete metadata', server_id)
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