567 lines
20 KiB
Python
567 lines
20 KiB
Python
# Copyright 2011 Justin Santa Barbara
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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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"""The volumes extension."""
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from oslo_utils import strutils
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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 volumes as volumes_schema
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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 import volume
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ALIAS = "os-volumes"
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authorize = extensions.os_compute_authorizer(ALIAS)
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authorize_attach = extensions.os_compute_authorizer('os-volumes-attachments')
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def _translate_volume_detail_view(context, vol):
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"""Maps keys for volumes details view."""
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d = _translate_volume_summary_view(context, vol)
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# No additional data / lookups at the moment
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return d
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def _translate_volume_summary_view(context, vol):
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"""Maps keys for volumes summary view."""
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d = {}
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d['id'] = vol['id']
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d['status'] = vol['status']
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d['size'] = vol['size']
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d['availabilityZone'] = vol['availability_zone']
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d['createdAt'] = vol['created_at']
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if vol['attach_status'] == 'attached':
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d['attachments'] = [_translate_attachment_detail_view(vol['id'],
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vol['instance_uuid'],
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vol['mountpoint'])]
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else:
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d['attachments'] = [{}]
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d['displayName'] = vol['display_name']
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d['displayDescription'] = vol['display_description']
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if vol['volume_type_id'] and vol.get('volume_type'):
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d['volumeType'] = vol['volume_type']['name']
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else:
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d['volumeType'] = vol['volume_type_id']
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d['snapshotId'] = vol['snapshot_id']
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if vol.get('volume_metadata'):
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d['metadata'] = vol.get('volume_metadata')
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else:
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d['metadata'] = {}
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return d
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class VolumeController(wsgi.Controller):
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"""The Volumes API controller for the OpenStack API."""
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def __init__(self):
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self.volume_api = volume.API()
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super(VolumeController, self).__init__()
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@extensions.expected_errors(404)
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def show(self, req, id):
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"""Return data about the given volume."""
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context = req.environ['nova.context']
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authorize(context)
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try:
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vol = self.volume_api.get(context, 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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return {'volume': _translate_volume_detail_view(context, vol)}
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@wsgi.response(202)
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@extensions.expected_errors(404)
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def delete(self, req, id):
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"""Delete a volume."""
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context = req.environ['nova.context']
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authorize(context)
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try:
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self.volume_api.delete(context, 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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@extensions.expected_errors(())
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def index(self, req):
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"""Returns a summary list of volumes."""
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return self._items(req, entity_maker=_translate_volume_summary_view)
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@extensions.expected_errors(())
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def detail(self, req):
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"""Returns a detailed list of volumes."""
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return self._items(req, entity_maker=_translate_volume_detail_view)
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def _items(self, req, entity_maker):
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"""Returns a list of volumes, transformed through entity_maker."""
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context = req.environ['nova.context']
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authorize(context)
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volumes = self.volume_api.get_all(context)
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limited_list = common.limited(volumes, req)
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res = [entity_maker(context, vol) for vol in limited_list]
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return {'volumes': res}
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@extensions.expected_errors((400, 404))
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@validation.schema(volumes_schema.create)
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def create(self, req, body):
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"""Creates a new volume."""
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context = req.environ['nova.context']
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authorize(context)
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vol = body['volume']
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vol_type = vol.get('volume_type')
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metadata = vol.get('metadata')
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snapshot_id = vol.get('snapshot_id', None)
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if snapshot_id is not None:
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try:
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snapshot = self.volume_api.get_snapshot(context, snapshot_id)
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except exception.SnapshotNotFound as e:
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raise exc.HTTPNotFound(explanation=e.format_message())
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else:
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snapshot = None
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size = vol.get('size', None)
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if size is None and snapshot is not None:
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size = snapshot['volume_size']
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availability_zone = vol.get('availability_zone')
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try:
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new_volume = self.volume_api.create(
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context,
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size,
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vol.get('display_name'),
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vol.get('display_description'),
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snapshot=snapshot,
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volume_type=vol_type,
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metadata=metadata,
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availability_zone=availability_zone
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)
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except exception.InvalidInput as err:
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raise exc.HTTPBadRequest(explanation=err.format_message())
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# TODO(vish): Instance should be None at db layer instead of
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# trying to lazy load, but for now we turn it into
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# a dict to avoid an error.
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retval = _translate_volume_detail_view(context, dict(new_volume))
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result = {'volume': retval}
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location = '%s/%s' % (req.url, new_volume['id'])
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return wsgi.ResponseObject(result, headers=dict(location=location))
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def _translate_attachment_detail_view(volume_id, instance_uuid, mountpoint):
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"""Maps keys for attachment details view."""
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d = _translate_attachment_summary_view(volume_id,
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instance_uuid,
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mountpoint)
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# No additional data / lookups at the moment
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return d
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def _translate_attachment_summary_view(volume_id, instance_uuid, mountpoint):
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"""Maps keys for attachment summary view."""
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d = {}
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# NOTE(justinsb): We use the volume id as the id of the attachment object
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d['id'] = volume_id
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d['volumeId'] = volume_id
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d['serverId'] = instance_uuid
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if mountpoint:
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d['device'] = mountpoint
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return d
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class VolumeAttachmentController(wsgi.Controller):
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"""The volume attachment API controller for the OpenStack API.
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A child resource of the server. Note that we use the volume id
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as the ID of the attachment (though this is not guaranteed externally)
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"""
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def __init__(self):
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self.compute_api = compute.API(skip_policy_check=True)
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self.volume_api = volume.API()
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super(VolumeAttachmentController, self).__init__()
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@extensions.expected_errors(404)
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def index(self, req, server_id):
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"""Returns the list of volume attachments for a given instance."""
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context = req.environ['nova.context']
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authorize_attach(context, action='index')
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return self._items(req, server_id,
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entity_maker=_translate_attachment_summary_view)
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@extensions.expected_errors(404)
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def show(self, req, server_id, id):
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"""Return data about the given volume attachment."""
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context = req.environ['nova.context']
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authorize(context)
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authorize_attach(context, action='show')
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volume_id = id
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instance = common.get_instance(self.compute_api, context, server_id)
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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 = _("Instance %s is not attached.") % server_id
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raise exc.HTTPNotFound(explanation=msg)
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assigned_mountpoint = None
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for bdm in bdms:
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if bdm.volume_id == volume_id:
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assigned_mountpoint = bdm.device_name
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break
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if assigned_mountpoint is None:
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msg = _("volume_id not found: %s") % volume_id
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raise exc.HTTPNotFound(explanation=msg)
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return {'volumeAttachment': _translate_attachment_detail_view(
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volume_id,
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instance.uuid,
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assigned_mountpoint)}
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@extensions.expected_errors((400, 404, 409))
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@validation.schema(volumes_schema.create_volume_attachment)
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def create(self, req, server_id, body):
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"""Attach a volume to an instance."""
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context = req.environ['nova.context']
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authorize(context)
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authorize_attach(context, action='create')
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volume_id = body['volumeAttachment']['volumeId']
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device = body['volumeAttachment'].get('device')
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instance = common.get_instance(self.compute_api, context, server_id)
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try:
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device = self.compute_api.attach_volume(context, instance,
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volume_id, device)
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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(state_error,
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'attach_volume', server_id)
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except (exception.InvalidVolume,
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exception.InvalidDevicePath) as e:
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raise exc.HTTPBadRequest(explanation=e.format_message())
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# The attach is async
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attachment = {}
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attachment['id'] = volume_id
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attachment['serverId'] = server_id
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attachment['volumeId'] = volume_id
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attachment['device'] = device
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# NOTE(justinsb): And now, we have a problem...
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# The attach is async, so there's a window in which we don't see
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# the attachment (until the attachment completes). We could also
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# get problems with concurrent requests. I think we need an
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# attachment state, and to write to the DB here, but that's a bigger
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# change.
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# For now, we'll probably have to rely on libraries being smart
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# TODO(justinsb): How do I return "accepted" here?
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return {'volumeAttachment': attachment}
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@wsgi.response(202)
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@extensions.expected_errors((400, 404, 409))
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@validation.schema(volumes_schema.update_volume_attachment)
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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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authorize(context)
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authorize_attach(context, action='update')
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old_volume_id = 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_id = body['volumeAttachment']['volumeId']
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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, server_id)
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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', server_id)
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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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@wsgi.response(202)
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@extensions.expected_errors((400, 403, 404, 409))
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def delete(self, req, server_id, id):
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"""Detach a volume from an instance."""
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context = req.environ['nova.context']
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authorize(context)
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authorize_attach(context, action='delete')
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volume_id = id
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instance = common.get_instance(self.compute_api, context, server_id)
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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 = _("Instance %s is not attached.") % server_id
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raise exc.HTTPNotFound(explanation=msg)
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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 != 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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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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'detach_volume', server_id)
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if not found:
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msg = _("volume_id not found: %s") % volume_id
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raise exc.HTTPNotFound(explanation=msg)
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def _items(self, req, server_id, entity_maker):
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"""Returns a list of attachments, transformed through entity_maker."""
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context = req.environ['nova.context']
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authorize(context)
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instance = common.get_instance(self.compute_api, context, server_id)
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bdms = objects.BlockDeviceMappingList.get_by_instance_uuid(
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context, instance.uuid)
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limited_list = common.limited(bdms, req)
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results = []
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for bdm in limited_list:
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if bdm.volume_id:
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results.append(entity_maker(bdm.volume_id,
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bdm.instance_uuid,
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bdm.device_name))
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return {'volumeAttachments': results}
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def _translate_snapshot_detail_view(context, vol):
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"""Maps keys for snapshots details view."""
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d = _translate_snapshot_summary_view(context, vol)
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# NOTE(gagupta): No additional data / lookups at the moment
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return d
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def _translate_snapshot_summary_view(context, vol):
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"""Maps keys for snapshots summary view."""
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d = {}
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d['id'] = vol['id']
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d['volumeId'] = vol['volume_id']
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d['status'] = vol['status']
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# NOTE(gagupta): We map volume_size as the snapshot size
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d['size'] = vol['volume_size']
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d['createdAt'] = vol['created_at']
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d['displayName'] = vol['display_name']
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d['displayDescription'] = vol['display_description']
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return d
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class SnapshotController(wsgi.Controller):
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"""The Snapshots API controller for the OpenStack API."""
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def __init__(self):
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self.volume_api = volume.API()
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super(SnapshotController, self).__init__()
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@extensions.expected_errors(404)
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def show(self, req, id):
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"""Return data about the given snapshot."""
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context = req.environ['nova.context']
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authorize(context)
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try:
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vol = self.volume_api.get_snapshot(context, id)
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except exception.SnapshotNotFound as e:
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raise exc.HTTPNotFound(explanation=e.format_message())
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return {'snapshot': _translate_snapshot_detail_view(context, vol)}
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@wsgi.response(202)
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@extensions.expected_errors(404)
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def delete(self, req, id):
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"""Delete a snapshot."""
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context = req.environ['nova.context']
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authorize(context)
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try:
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self.volume_api.delete_snapshot(context, id)
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except exception.SnapshotNotFound as e:
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raise exc.HTTPNotFound(explanation=e.format_message())
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@extensions.expected_errors(())
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def index(self, req):
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"""Returns a summary list of snapshots."""
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return self._items(req, entity_maker=_translate_snapshot_summary_view)
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@extensions.expected_errors(())
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def detail(self, req):
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"""Returns a detailed list of snapshots."""
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return self._items(req, entity_maker=_translate_snapshot_detail_view)
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def _items(self, req, entity_maker):
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"""Returns a list of snapshots, transformed through entity_maker."""
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context = req.environ['nova.context']
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authorize(context)
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snapshots = self.volume_api.get_all_snapshots(context)
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limited_list = common.limited(snapshots, req)
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res = [entity_maker(context, snapshot) for snapshot in limited_list]
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return {'snapshots': res}
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@extensions.expected_errors(400)
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@validation.schema(volumes_schema.snapshot_create)
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def create(self, req, body):
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"""Creates a new snapshot."""
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context = req.environ['nova.context']
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authorize(context)
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snapshot = body['snapshot']
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volume_id = snapshot['volume_id']
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force = snapshot.get('force', False)
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force = strutils.bool_from_string(force, strict=True)
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if force:
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create_func = self.volume_api.create_snapshot_force
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else:
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create_func = self.volume_api.create_snapshot
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new_snapshot = create_func(context, volume_id,
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snapshot.get('display_name'),
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snapshot.get('display_description'))
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retval = _translate_snapshot_detail_view(context, new_snapshot)
|
|
return {'snapshot': retval}
|
|
|
|
|
|
class Volumes(extensions.V21APIExtensionBase):
|
|
"""Volumes support."""
|
|
|
|
name = "Volumes"
|
|
alias = ALIAS
|
|
version = 1
|
|
|
|
def get_resources(self):
|
|
resources = []
|
|
|
|
res = extensions.ResourceExtension(
|
|
ALIAS, VolumeController(), collection_actions={'detail': 'GET'})
|
|
resources.append(res)
|
|
|
|
res = extensions.ResourceExtension('os-volumes_boot',
|
|
inherits='servers')
|
|
resources.append(res)
|
|
|
|
res = extensions.ResourceExtension('os-volume_attachments',
|
|
VolumeAttachmentController(),
|
|
parent=dict(
|
|
member_name='server',
|
|
collection_name='servers'))
|
|
resources.append(res)
|
|
|
|
res = extensions.ResourceExtension(
|
|
'os-snapshots', SnapshotController(),
|
|
collection_actions={'detail': 'GET'})
|
|
resources.append(res)
|
|
|
|
return resources
|
|
|
|
def get_controller_extensions(self):
|
|
return []
|