Comment 15 for bug 1493512

I noticed the tempest config block_migrate_cinder_iscsi:

https://github.com/openstack/tempest/blob/master/tempest/config.py#L363

    cfg.BoolOpt('block_migrate_cinder_iscsi',
                default=False,
                help="Does the test environment block migration support "
                "cinder iSCSI volumes. Note, libvirt doesn't support this, "
                "see https://bugs.launchpad.net/nova/+bug/1398999"),

which calls out bug 1398999. Given https://review.openstack.org/#/c/139085/ - it seems that what you're trying to do here is maybe invalid given that bug?