173 lines
6.0 KiB
Python
173 lines
6.0 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright 2011 OpenStack LLC.
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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 import compute
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from nova.api.openstack import common
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from nova.api.openstack import wsgi
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from nova import exception
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from nova import quota
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class Controller(object):
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""" The server metadata API controller for the Openstack API """
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def __init__(self):
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self.compute_api = compute.API()
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super(Controller, self).__init__()
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def _get_metadata(self, context, server_id):
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try:
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meta = self.compute_api.get_instance_metadata(context, server_id)
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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.iteritems():
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meta_dict[key] = value
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return meta_dict
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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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return {'metadata': self._get_metadata(context, server_id)}
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def create(self, req, server_id, body):
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try:
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metadata = body['metadata']
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except (KeyError, TypeError):
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msg = _("Malformed request body")
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raise exc.HTTPBadRequest(explanation=msg)
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context = req.environ['nova.context']
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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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def update(self, req, server_id, id, body):
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try:
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meta_item = body['meta']
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except (TypeError, KeyError):
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expl = _('Malformed request body')
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raise exc.HTTPBadRequest(explanation=expl)
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try:
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meta_value = meta_item[id]
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except (AttributeError, KeyError):
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expl = _('Request body and URI mismatch')
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raise exc.HTTPBadRequest(explanation=expl)
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if len(meta_item) > 1:
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expl = _('Request body contains too many items')
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raise exc.HTTPBadRequest(explanation=expl)
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context = req.environ['nova.context']
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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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def update_all(self, req, server_id, body):
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try:
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metadata = body['metadata']
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except (TypeError, KeyError):
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expl = _('Malformed request body')
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raise exc.HTTPBadRequest(explanation=expl)
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context = req.environ['nova.context']
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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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try:
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return self.compute_api.update_instance_metadata(context,
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server_id,
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metadata,
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delete)
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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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except (ValueError, AttributeError):
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msg = _("Malformed request body")
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raise exc.HTTPBadRequest(explanation=msg)
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except quota.QuotaError as error:
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self._handle_quota_error(error)
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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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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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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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metadata = self._get_metadata(context, server_id)
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try:
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meta_value = metadata[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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self.compute_api.delete_instance_metadata(context, server_id, id)
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def _handle_quota_error(self, error):
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"""Reraise quota errors as api-specific http exceptions."""
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if error.code == "MetadataLimitExceeded":
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raise exc.HTTPRequestEntityTooLarge(explanation=error.message,
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headers={'Retry-After': 0})
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raise error
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def create_resource():
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headers_serializer = common.MetadataHeadersSerializer()
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body_deserializers = {
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'application/xml': common.MetadataXMLDeserializer(),
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}
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body_serializers = {
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'application/xml': common.MetadataXMLSerializer(),
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}
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serializer = wsgi.ResponseSerializer(body_serializers, headers_serializer)
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deserializer = wsgi.RequestDeserializer(body_deserializers)
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return wsgi.Resource(Controller(), deserializer, serializer)
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