Open Stack

We are running zed deployed with kolla-ansible.  We are running into an
issue with Live Migration.  These are the steps to reproduce the issue:

- Create a VM
- Attach a Cinder Volume.  This will create a new Storage Controller.
- Start writing data to the new disk.  We used FIO.  Let FIO run until it
starts reporting IOPS data.
- Live migrate the VM
- The VM will migrate and FIO will continue to run.  FIO will show 0 or no
IOPS
- lspci output will show that the new storage device is in error.
- The VM will remain in this state until the user issues a hard reset
command
- Once the VM is rebooted, the issue can not be reproduced until another
device is attached

This also happens if we attach a new VNIC.

Prior to migration, this is what we see:

root at test-vm-cd:~# cat before_migration_lspci.txt | grep block

05:00.0 SCSI storage controller: Red Hat, Inc. Virtio block device (rev 01)

      Subsystem: Red Hat, Inc. Virtio block device

08:00.0 SCSI storage controller: Red Hat, Inc. Virtio block device (rev 01)

      Subsystem: Red Hat, Inc. Virtio block device


 Post migration we see this:


08:00.0 SCSI storage controller: Red Hat, Inc. Virtio block device (rev ff)
(prog-if ff)

        !!! Unknown header type 7f

        Kernel driver in use: virtio-pci


The original SCSI controller is fine.  Outside of the above error, we don't
see any other errors.  From Openstack's perspective, the migration went
fine.  Any suggestions on where to look? Has anyone else seen this?


Thanks,

Chris
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