256 lines
8.7 KiB
Python
256 lines
8.7 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 snapshots api."""
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from oslo_log import log as logging
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from oslo_utils import strutils
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import webob
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from webob import exc
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from cinder.api import common
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from cinder.api.openstack import wsgi
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from cinder.api.views import snapshots as snapshot_views
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from cinder.api import xmlutil
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from cinder import exception
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from cinder.i18n import _, _LI
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from cinder import utils
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from cinder import volume
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from cinder.volume import utils as volume_utils
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LOG = logging.getLogger(__name__)
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def make_snapshot(elem):
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elem.set('id')
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elem.set('status')
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elem.set('size')
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elem.set('created_at')
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elem.set('name')
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elem.set('description')
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elem.set('volume_id')
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elem.append(common.MetadataTemplate())
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class SnapshotTemplate(xmlutil.TemplateBuilder):
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def construct(self):
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root = xmlutil.TemplateElement('snapshot', selector='snapshot')
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make_snapshot(root)
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return xmlutil.MasterTemplate(root, 1)
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class SnapshotsTemplate(xmlutil.TemplateBuilder):
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def construct(self):
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root = xmlutil.TemplateElement('snapshots')
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elem = xmlutil.SubTemplateElement(root, 'snapshot',
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selector='snapshots')
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make_snapshot(elem)
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return xmlutil.MasterTemplate(root, 1)
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class SnapshotsController(wsgi.Controller):
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"""The Snapshots API controller for the OpenStack API."""
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_view_builder_class = snapshot_views.ViewBuilder
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def __init__(self, ext_mgr=None):
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self.volume_api = volume.API()
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self.ext_mgr = ext_mgr
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super(SnapshotsController, self).__init__()
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@wsgi.serializers(xml=SnapshotTemplate)
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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['cinder.context']
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try:
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snapshot = self.volume_api.get_snapshot(context, id)
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req.cache_db_snapshot(snapshot)
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except exception.SnapshotNotFound as error:
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raise exc.HTTPNotFound(explanation=error.msg)
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return self._view_builder.detail(req, snapshot)
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def delete(self, req, id):
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"""Delete a snapshot."""
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context = req.environ['cinder.context']
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LOG.info(_LI("Delete snapshot with id: %s"), id, context=context)
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try:
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snapshot = self.volume_api.get_snapshot(context, id)
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self.volume_api.delete_snapshot(context, snapshot)
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except exception.SnapshotNotFound as error:
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raise exc.HTTPNotFound(explanation=error.msg)
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return webob.Response(status_int=202)
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@wsgi.serializers(xml=SnapshotsTemplate)
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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, is_detail=False)
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@wsgi.serializers(xml=SnapshotsTemplate)
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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, is_detail=True)
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def _items(self, req, is_detail=True):
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"""Returns a list of snapshots, transformed through view builder."""
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context = req.environ['cinder.context']
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# Pop out non search_opts and create local variables
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search_opts = req.GET.copy()
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search_opts.pop('limit', None)
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search_opts.pop('offset', None)
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# Filter out invalid options
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allowed_search_options = ('status', 'volume_id', 'name')
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utils.remove_invalid_filter_options(context, search_opts,
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allowed_search_options)
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# NOTE(thingee): v2 API allows name instead of display_name
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if 'name' in search_opts:
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search_opts['display_name'] = search_opts['name']
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del search_opts['name']
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snapshots = self.volume_api.get_all_snapshots(context,
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search_opts=search_opts)
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limited_list = common.limited(snapshots.objects, req)
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req.cache_db_snapshots(limited_list)
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snapshot_count = len(snapshots)
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if is_detail:
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snapshots = self._view_builder.detail_list(req, limited_list,
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snapshot_count)
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else:
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snapshots = self._view_builder.summary_list(req, limited_list,
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snapshot_count)
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return snapshots
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@wsgi.response(202)
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@wsgi.serializers(xml=SnapshotTemplate)
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def create(self, req, body):
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"""Creates a new snapshot."""
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kwargs = {}
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context = req.environ['cinder.context']
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self.assert_valid_body(body, 'snapshot')
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snapshot = body['snapshot']
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kwargs['metadata'] = snapshot.get('metadata', None)
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try:
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volume_id = snapshot['volume_id']
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except KeyError:
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msg = _("'volume_id' must be specified")
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raise exc.HTTPBadRequest(explanation=msg)
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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 error:
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raise exc.HTTPNotFound(explanation=error.msg)
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force = snapshot.get('force', False)
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msg = _LI("Create snapshot from volume %s")
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LOG.info(msg, volume_id, context=context)
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self.validate_name_and_description(snapshot)
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# NOTE(thingee): v2 API allows name instead of display_name
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if 'name' in snapshot:
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snapshot['display_name'] = snapshot.pop('name')
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try:
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force = strutils.bool_from_string(force, strict=True)
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except ValueError as error:
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msg = _("Invalid value for 'force': '%s'") % error.message
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raise exception.InvalidParameterValue(err=msg)
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if force:
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new_snapshot = self.volume_api.create_snapshot_force(
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context,
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volume,
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snapshot.get('display_name'),
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snapshot.get('description'),
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**kwargs)
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else:
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new_snapshot = self.volume_api.create_snapshot(
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context,
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volume,
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snapshot.get('display_name'),
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snapshot.get('description'),
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**kwargs)
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req.cache_db_snapshot(new_snapshot)
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return self._view_builder.detail(req, new_snapshot)
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@wsgi.serializers(xml=SnapshotTemplate)
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def update(self, req, id, body):
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"""Update a snapshot."""
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context = req.environ['cinder.context']
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if not body:
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msg = _("Missing request body")
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raise exc.HTTPBadRequest(explanation=msg)
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if 'snapshot' not in body:
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msg = (_("Missing required element '%s' in request body") %
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'snapshot')
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raise exc.HTTPBadRequest(explanation=msg)
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snapshot = body['snapshot']
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update_dict = {}
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valid_update_keys = (
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'name',
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'description',
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'display_name',
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'display_description',
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)
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self.validate_name_and_description(snapshot)
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# NOTE(thingee): v2 API allows name instead of display_name
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if 'name' in snapshot:
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snapshot['display_name'] = snapshot.pop('name')
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# NOTE(thingee): v2 API allows description instead of
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# display_description
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if 'description' in snapshot:
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snapshot['display_description'] = snapshot.pop('description')
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for key in valid_update_keys:
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if key in snapshot:
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update_dict[key] = snapshot[key]
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try:
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snapshot = self.volume_api.get_snapshot(context, id)
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volume_utils.notify_about_snapshot_usage(context, snapshot,
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'update.start')
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self.volume_api.update_snapshot(context, snapshot, update_dict)
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except exception.SnapshotNotFound as error:
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raise exc.HTTPNotFound(explanation=error.msg)
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snapshot.update(update_dict)
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req.cache_db_snapshot(snapshot)
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volume_utils.notify_about_snapshot_usage(context, snapshot,
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'update.end')
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return self._view_builder.detail(req, snapshot)
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def create_resource(ext_mgr):
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return wsgi.Resource(SnapshotsController(ext_mgr))
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