238 lines
9.8 KiB
Python
238 lines
9.8 KiB
Python
# Copyright 2013 OpenStack Foundation
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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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"""The Extended Volumes API extension."""
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import webob
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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.v3 import extended_volumes
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from nova.api.openstack import extensions
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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 import compute
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from nova import exception
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from nova.i18n import _
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from nova import objects
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from nova.openstack.common import log as logging
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from nova import volume
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ALIAS = "os-extended-volumes"
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LOG = logging.getLogger(__name__)
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authorize = extensions.soft_extension_authorizer('compute', 'v3:' + ALIAS)
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authorize_attach = extensions.extension_authorizer('compute',
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'v3:%s:attach' % ALIAS)
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authorize_detach = extensions.extension_authorizer('compute',
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'v3:%s:detach' % ALIAS)
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authorize_swap = extensions.extension_authorizer('compute',
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'v3:%s:swap' % ALIAS)
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class ExtendedVolumesController(wsgi.Controller):
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def __init__(self, *args, **kwargs):
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super(ExtendedVolumesController, self).__init__(*args, **kwargs)
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self.compute_api = compute.API()
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self.volume_api = volume.API()
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def _extend_server(self, context, server, instance):
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bdms = objects.BlockDeviceMappingList.get_by_instance_uuid(
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context, instance['uuid'])
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volume_ids = [bdm['volume_id'] for bdm in bdms if bdm['volume_id']]
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key = "%s:volumes_attached" % ExtendedVolumes.alias
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server[key] = [{'id': volume_id} for volume_id in volume_ids]
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@extensions.expected_errors((400, 404, 409))
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@wsgi.action('swap_volume_attachment')
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@validation.schema(extended_volumes.swap_volume_attachment)
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def swap(self, req, id, body):
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context = req.environ['nova.context']
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authorize_swap(context)
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old_volume_id = body['swap_volume_attachment']['old_volume_id']
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new_volume_id = body['swap_volume_attachment']['new_volume_id']
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try:
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old_volume = self.volume_api.get(context, old_volume_id)
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new_volume = self.volume_api.get(context, new_volume_id)
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except exception.VolumeNotFound as e:
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raise exc.HTTPNotFound(explanation=e.format_message())
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instance = common.get_instance(self.compute_api, context, id,
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want_objects=True)
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bdms = objects.BlockDeviceMappingList.get_by_instance_uuid(
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context, instance.uuid)
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found = False
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try:
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for bdm in bdms:
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if bdm.volume_id != old_volume_id:
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continue
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try:
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self.compute_api.swap_volume(context, instance, old_volume,
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new_volume)
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found = True
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break
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except exception.VolumeUnattached:
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# The volume is not attached. Treat it as NotFound
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# by falling through.
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pass
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except exception.InvalidVolume as e:
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raise exc.HTTPBadRequest(explanation=e.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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'swap_volume')
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if not found:
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msg = _("The volume was either invalid or not attached to the "
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"instance.")
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raise exc.HTTPNotFound(explanation=msg)
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else:
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return webob.Response(status_int=202)
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@wsgi.extends
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def show(self, req, resp_obj, id):
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context = req.environ['nova.context']
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if authorize(context):
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server = resp_obj.obj['server']
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db_instance = req.get_db_instance(server['id'])
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# server['id'] is guaranteed to be in the cache due to
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# the core API adding it in its 'show' method.
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self._extend_server(context, server, db_instance)
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@wsgi.extends
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def detail(self, req, resp_obj):
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context = req.environ['nova.context']
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if authorize(context):
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servers = list(resp_obj.obj['servers'])
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for server in servers:
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db_instance = req.get_db_instance(server['id'])
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# server['id'] is guaranteed to be in the cache due to
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# the core API adding it in its 'detail' method.
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self._extend_server(context, server, db_instance)
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@extensions.expected_errors((400, 404, 409))
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@wsgi.response(202)
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@wsgi.action('attach')
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@validation.schema(extended_volumes.attach)
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def attach(self, req, id, body):
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server_id = id
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context = req.environ['nova.context']
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authorize_attach(context)
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volume_id = body['attach']['volume_id']
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device = body['attach'].get('device')
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disk_bus = body['attach'].get('disk_bus')
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device_type = body['attach'].get('device_type')
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LOG.audit(_("Attach volume %(volume_id)s to instance %(server_id)s "
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"at %(device)s"),
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{'volume_id': volume_id,
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'device': device,
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'server_id': server_id},
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context=context)
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instance = common.get_instance(self.compute_api, context, server_id,
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want_objects=True)
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try:
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self.compute_api.attach_volume(context, instance,
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volume_id, device,
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disk_bus=disk_bus,
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device_type=device_type)
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except exception.VolumeNotFound as e:
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raise exc.HTTPNotFound(explanation=e.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(
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state_error, 'attach_volume')
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except exception.InvalidVolume as e:
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raise exc.HTTPBadRequest(explanation=e.format_message())
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except exception.InvalidDevicePath as e:
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raise exc.HTTPBadRequest(explanation=e.format_message())
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@extensions.expected_errors((400, 403, 404, 409))
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@wsgi.response(202)
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@wsgi.action('detach')
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@validation.schema(extended_volumes.detach)
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def detach(self, req, id, body):
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server_id = id
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context = req.environ['nova.context']
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authorize_detach(context)
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volume_id = body['detach']['volume_id']
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LOG.audit(_("Detach volume %(volume_id)s from "
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"instance %(server_id)s"),
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{"volume_id": volume_id,
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"server_id": id,
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"context": context})
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instance = common.get_instance(self.compute_api, context, server_id,
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want_objects=True)
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try:
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volume = self.volume_api.get(context, volume_id)
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except exception.VolumeNotFound as e:
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raise exc.HTTPNotFound(explanation=e.format_message())
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bdms = objects.BlockDeviceMappingList.get_by_instance_uuid(
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context, instance.uuid)
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if not bdms:
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msg = _("Volume %(volume_id)s is not attached to the "
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"instance %(server_id)s") % {'server_id': server_id,
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'volume_id': volume_id}
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LOG.debug(msg)
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raise exc.HTTPNotFound(explanation=msg)
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for bdm in bdms:
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if bdm.volume_id != volume_id:
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continue
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if bdm.is_root:
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msg = _("Can't detach root device volume")
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raise exc.HTTPForbidden(explanation=msg)
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try:
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self.compute_api.detach_volume(context, instance, volume)
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break
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except exception.VolumeUnattached:
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# The volume is not attached. Treat it as NotFound
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# by falling through.
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pass
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except exception.InvalidVolume as e:
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raise exc.HTTPBadRequest(explanation=e.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(
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state_error, 'detach_volume')
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else:
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msg = _("Volume %(volume_id)s is not attached to the "
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"instance %(server_id)s") % {'server_id': server_id,
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'volume_id': volume_id}
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raise exc.HTTPNotFound(explanation=msg)
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class ExtendedVolumes(extensions.V3APIExtensionBase):
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"""Extended Volumes support."""
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name = "ExtendedVolumes"
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alias = ALIAS
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version = 1
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def get_controller_extensions(self):
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controller = ExtendedVolumesController()
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extension = extensions.ControllerExtension(self, 'servers', controller)
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return [extension]
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def get_resources(self):
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return []
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