** Also affects: nova Importance: Undecided Status: New ** No longer affects: cinder
** Tags added: volumes -- You received this bug notification because you are a member of Yahoo! Engineering Team, which is subscribed to OpenStack Compute (nova). https://bugs.launchpad.net/bugs/1536442 Title: swap volume is not available because the parameters are opposite Status in OpenStack Compute (nova): New Bug description: version: kilo description: in the fileļ¼/nova/compute/manager.py . the functions like this: class _ComputeV4Proxy(object): def swap_volume(self, ctxt, instance, old_volume_id, new_volume_id): return self.manager.swap_volume(ctxt, instance, old_volume_id, new_volume_id) class ComputeManager(manager.Manager): @wrap_exception() @reverts_task_state @wrap_instance_fault def swap_volume(self, context, old_volume_id, new_volume_id, instance): you see ,the parameters of instance should be in the right place . product steps: 1 create a volume 2 create a vm 3 attach the volume to the vm 4 migrate the volume to another backend. error logs: 2016-01-21 10:57:24.916 24271 ERROR root [req-15d4d656-06ee-4c02-8da0-af77aaaa9944 9134a1a11e5441c29e37757231f36450 32bfe3124bb2478aad3e6aa1cee09f14 - - -] Original exception being dropped: ['Traceback (most recent call last):\n', ' File "/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 392, in decorated_function\n return function(self, context, *args, **kwargs)\n', ' File "/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 5628, in swap_volume\n instance.uuid)\n', "AttributeError: 'unicode' object has no attribute 'uuid'\n"] 2016-01-21 10:57:24.916 24271 ERROR root [req-15d4d656-06ee-4c02-8da0-af77aaaa9944 9134a1a11e5441c29e37757231f36450 32bfe3124bb2478aad3e6aa1cee09f14 - - -] Original exception being dropped: ['Traceback (most recent call last):\n', ' File "/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 347, in decorated_function\n return function(self, context, *args, **kwargs)\n', ' File "/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 404, in decorated_function\n kwargs[\'instance\'], e, sys.exc_info())\n', ' File "/usr/lib/python2.7/site-packages/nova/compute/utils.py", line 89, in add_instance_fault_from_exc\n fault_obj.instance_uuid = instance.uuid\n', "AttributeError: 'unicode' object has no attribute 'uuid'\n"] 2016-01-21 10:57:24.917 24271 ERROR oslo_messaging.rpc.dispatcher [req-15d4d656-06ee-4c02-8da0-af77aaaa9944 9134a1a11e5441c29e37757231f36450 32bfe3124bb2478aad3e6aa1cee09f14 - - -] Exception during message handling: string indices must be integers 2016-01-21 10:57:24.917 24271 TRACE oslo_messaging.rpc.dispatcher Traceback (most recent call last): 2016-01-21 10:57:24.917 24271 TRACE oslo_messaging.rpc.dispatcher File "/usr/lib/python2.7/site-packages/oslo_messaging/rpc/dispatcher.py", line 142, in _dispatch_and_reply 2016-01-21 10:57:24.917 24271 TRACE oslo_messaging.rpc.dispatcher executor_callback)) 2016-01-21 10:57:24.917 24271 TRACE oslo_messaging.rpc.dispatcher File "/usr/lib/python2.7/site-packages/oslo_messaging/rpc/dispatcher.py", line 186, in _dispatch 2016-01-21 10:57:24.917 24271 TRACE oslo_messaging.rpc.dispatcher executor_callback) 2016-01-21 10:57:24.917 24271 TRACE oslo_messaging.rpc.dispatcher File "/usr/lib/python2.7/site-packages/oslo_messaging/rpc/dispatcher.py", line 130, in _do_dispatch 2016-01-21 10:57:24.917 24271 TRACE oslo_messaging.rpc.dispatcher result = func(ctxt, **new_args) 2016-01-21 10:57:24.917 24271 TRACE oslo_messaging.rpc.dispatcher File "/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 8262, in swap_volume 2016-01-21 10:57:24.917 24271 TRACE oslo_messaging.rpc.dispatcher new_volume_id) 2016-01-21 10:57:24.917 24271 TRACE oslo_messaging.rpc.dispatcher File "/usr/lib/python2.7/site-packages/nova/exception.py", line 88, in wrapped 2016-01-21 10:57:24.917 24271 TRACE oslo_messaging.rpc.dispatcher payload) 2016-01-21 10:57:24.917 24271 TRACE oslo_messaging.rpc.dispatcher File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 85, in __exit__ 2016-01-21 10:57:24.917 24271 TRACE oslo_messaging.rpc.dispatcher six.reraise(self.type_, self.value, self.tb) 2016-01-21 10:57:24.917 24271 TRACE oslo_messaging.rpc.dispatcher File "/usr/lib/python2.7/site-packages/nova/exception.py", line 71, in wrapped 2016-01-21 10:57:24.917 24271 TRACE oslo_messaging.rpc.dispatcher return f(self, context, *args, **kw) 2016-01-21 10:57:24.917 24271 TRACE oslo_messaging.rpc.dispatcher File "/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 363, in decorated_function 2016-01-21 10:57:24.917 24271 TRACE oslo_messaging.rpc.dispatcher instance_uuid = keyed_args['instance']['uuid'] 2016-01-21 10:57:24.917 24271 TRACE oslo_messaging.rpc.dispatcher TypeError: string indices must be integers please check this bug, tks. 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