def show(self, req, server_id, id):
"""Return data about the given volume attachment."""
context = req.environ['nova.context']
authorize(context)
authorize_attach(context, action='show')
volume_id = id
instance = common.get_instance(self.compute_api, context, server_id)
bdms = objects.BlockDeviceMappingList.get_by_instance_uuid(
context, instance.uuid)
if not bdms:
msg = _("Instance %s is not attached.") % server_id
raise exc.HTTPNotFound(explanation=msg)
assigned_mountpoint = None
for bdm in bdms:
if bdm.volume_id == volume_id:
assigned_mountpoint = bdm.device_name
break
if assigned_mountpoint is None:
msg = _("volume_id not found: %s") % volume_id
raise exc.HTTPNotFound(explanation=msg)
return {'volumeAttachment': _translate_attachment_detail_view(
volume_id,
instance.uuid,
assigned_mountpoint)}
def update(self, req, server_id, id, body):
if (not self.ext_mgr or
not self.ext_mgr.is_loaded('os-volume-attachment-update')):
raise exc.HTTPBadRequest()
context = req.environ['nova.context']
authorize(context)
authorize_attach(context, action='update')
if not self.is_valid_body(body, 'volumeAttachment'):
msg = _("volumeAttachment not specified")
raise exc.HTTPBadRequest(explanation=msg)
old_volume_id = id
old_volume = self.volume_api.get(context, old_volume_id)
try:
new_volume_id = body['volumeAttachment']['volumeId']
except KeyError:
msg = _("volumeId must be specified.")
raise exc.HTTPBadRequest(explanation=msg)
self._validate_volume_id(new_volume_id)
new_volume = self.volume_api.get(context, new_volume_id)
instance = common.get_instance(self.compute_api, context, server_id)
bdms = objects.BlockDeviceMappingList.get_by_instance_uuid(
context, instance.uuid)
found = False
try:
for bdm in bdms:
if bdm.volume_id != old_volume_id:
continue
try:
self.compute_api.swap_volume(context, instance, old_volume,
new_volume)
found = True
break
except exception.VolumeUnattached:
# The volume is not attached. Treat it as NotFound
# by falling through.
pass
except exception.InstanceIsLocked as e:
raise exc.HTTPConflict(explanation=e.format_message())
except exception.InstanceInvalidState as state_error:
common.raise_http_conflict_for_instance_invalid_state(state_error,
'swap_volume', server_id)
if not found:
msg = _("volume_id not found: %s") % old_volume_id
raise exc.HTTPNotFound(explanation=msg)
else:
return webob.Response(status_int=202)
def delete(self, req, server_id, id):
"""Detach a volume from an instance."""
context = req.environ['nova.context']
authorize(context)
authorize_attach(context, action='delete')
volume_id = id
LOG.info(_LI("Detach volume %s"), volume_id, context=context)
instance = common.get_instance(self.compute_api, context, server_id)
volume = self.volume_api.get(context, volume_id)
bdms = objects.BlockDeviceMappingList.get_by_instance_uuid(
context, instance.uuid)
if not bdms:
msg = _("Instance %s is not attached.") % server_id
raise exc.HTTPNotFound(explanation=msg)
found = False
try:
for bdm in bdms:
if bdm.volume_id != volume_id:
continue
if bdm.is_root:
msg = _("Can't detach root device volume")
raise exc.HTTPForbidden(explanation=msg)
try:
self.compute_api.detach_volume(context, instance, volume)
found = True
break
except exception.VolumeUnattached:
# The volume is not attached. Treat it as NotFound
# by falling through.
pass
except exception.InstanceIsLocked as e:
raise exc.HTTPConflict(explanation=e.format_message())
except exception.InstanceInvalidState as state_error:
common.raise_http_conflict_for_instance_invalid_state(state_error,
'detach_volume', server_id)
if not found:
msg = _("volume_id not found: %s") % volume_id
raise exc.HTTPNotFound(explanation=msg)
else:
return webob.Response(status_int=202)
def _items(self, req, server_id, entity_maker):
"""Returns a list of attachments, transformed through entity_maker."""
context = req.environ['nova.context']
authorize(context)
instance = common.get_instance(self.compute_api, context, server_id)
bdms = objects.BlockDeviceMappingList.get_by_instance_uuid(
context, instance.uuid)
limited_list = common.limited(bdms, req)
results = []
for bdm in limited_list:
if bdm.volume_id:
results.append(entity_maker(bdm.volume_id,
bdm.instance_uuid,
bdm.device_name))
return {'volumeAttachments': results}
