Live Migration is failing for volume backend instances

[Paul Bessa]

Live Migrations are failing for Instances created on external backend storage arrays.

Steps to reproduce:

1.) Create a SAN boot volume from backend.
2.) boot an instance from the backend volume.
3.) Run I/O to the instance
4.) Perform instance "Live Migration"
ensure "Block Migration" check box is selected.

Expected results:

Successful instance migration

Actual results:

Live Migrations fails instantly with the error message below.

nova.virt.libvirt.driver [req-c76120a2-42e4-4185-956a-05a925ba0130 b6739a0e371e4d43bddf91563d565005 a63e487189374fe6ab85875dbae40dc4 - - -] [instance: 09950c20-0676-4fad-a295-56f6f69e75c7] Cannot block migrate instance 09950c20-0676-4fad-a295-56f6f69e75c7 with mapped volumes. Selective block device migration feature requires libvirt version 1.2.17

oslo_messaging.rpc.dispatcher [req-c76120a2-42e4-4185-956a-05a925ba0130 b6739a0e371e4d43bddf91563d565005 a63e487189374fe6ab85875dbae40dc4 - - -] Exception during message handling: Migration pre-check error: Cannot block migrate instance 09950c20-0676-4fad-a295-56f6f69e75c7 with mapped volumes. Selective block device migration feature requires libvirt version 1.2.17
2016-08-30 16:47:21.372 8693 ERROR oslo_messaging.rpc.dispatcher Traceback (most recent call last):
2016-08-30 16:47:21.372 8693 ERROR oslo_messaging.rpc.dispatcher File "/usr/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatcher.py", line 138, in _dispatch_and_reply
2016-08-30 16:47:21.372 8693 ERROR oslo_messaging.rpc.dispatcher incoming.message))
2016-08-30 16:47:21.372 8693 ERROR oslo_messaging.rpc.dispatcher File "/usr/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatcher.py", line 185, in _dispatch
2016-08-30 16:47:21.372 8693 ERROR oslo_messaging.rpc.dispatcher return self._do_dispatch(endpoint, method, ctxt, args)
2016-08-30 16:47:21.372 8693 ERROR oslo_messaging.rpc.dispatcher File "/usr/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatcher.py", line 127, in _do_dispatch
2016-08-30 16:47:21.372 8693 ERROR oslo_messaging.rpc.dispatcher result = func(ctxt, **new_args)
2016-08-30 16:47:21.372 8693 ERROR oslo_messaging.rpc.dispatcher File "/usr/lib/python2.7/dist-packages/nova/exception.py", line 110, in wrapped
2016-08-30 16:47:21.372 8693 ERROR oslo_messaging.rpc.dispatcher payload)
2016-08-30 16:47:21.372 8693 ERROR oslo_messaging.rpc.dispatcher File "/usr/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 220, in __exit__
2016-08-30 16:47:21.372 8693 ERROR oslo_messaging.rpc.dispatcher self.force_reraise()
2016-08-30 16:47:21.372 8693 ERROR oslo_messaging.rpc.dispatcher File "/usr/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 196, in force_reraise
2016-08-30 16:47:21.372 8693 ERROR oslo_messaging.rpc.dispa

Environment:

Environment
===========

Multinode test environment with one Controller node with Cinder role and two Compute nodes.
Cinder backend with EMC FC/iSCSI driver.
Mirantis OpenStack 9 (Mitaka)
EMC Backend Storage platforms

[Roman Podoliaka (rpodolyaka)]

MOS 9.2 and MOS 10.0 are shipped with a newer libvirt version (1.3.1) and must not be affected.

[Roman Podoliaka (rpodolyaka)]

http://mirror.fuel-infra.org/mos-repos/ubuntu/9.2/pool/main/libv/libvirt/

[Vladimir Jigulin (vjigulin)]

EMC VNX plugin is not available, also we need special hw to verify this bug.
Closing bug due @rpodolyaka comment above.