Open Stack

Hi,

When I perform a shared storage based live migration with Ceph-based
attached volume it works fine, but when NFS-based volume is attached the
migration fails with this message on the source host:

2014-05-23 06:23:04.654 32179 TRACE nova.virt.libvirt.volume Traceback
(most recent call last):
2014-05-23 06:23:04.654 32179 TRACE nova.virt.libvirt.volume   File
"/usr/lib/python2.6/site-packages/nova/virt/libvirt/volume.py", line 675,
in disconnect_volume
2014-05-23 06:23:04.654 32179 TRACE nova.virt.libvirt.volume
utils.execute('umount', mount_path, run_as_root=True)
2014-05-23 06:23:04.654 32179 TRACE nova.virt.libvirt.volume   File
"/usr/lib/python2.6/site-packages/nova/utils.py", line 164, in execute
2014-05-23 06:23:04.654 32179 TRACE nova.virt.libvirt.volume     return
processutils.execute(*cmd, **kwargs)
2014-05-23 06:23:04.654 32179 TRACE nova.virt.libvirt.volume   File
"/usr/lib/python2.6/site-packages/nova/openstack/common/processutils.py",
line 193, in execute
2014-05-23 06:23:04.654 32179 TRACE nova.virt.libvirt.volume     cmd='
'.join(cmd))
2014-05-23 06:23:04.654 32179 TRACE nova.virt.libvirt.volume
ProcessExecutionError: Unexpected error while running command.
2014-05-23 06:23:04.654 32179 TRACE nova.virt.libvirt.volume Command: sudo
nova-rootwrap /etc/nova/rootwrap.conf umount
/var/lib/nova/mnt/4e5299ba6e7bf5350915eef249c29c9a
2014-05-23 06:23:04.654 32179 TRACE nova.virt.libvirt.volume Exit code: 16
2014-05-23 06:23:04.654 32179 TRACE nova.virt.libvirt.volume Stdout: ''
2014-05-23 06:23:04.654 32179 TRACE nova.virt.libvirt.volume Stderr:
'umount.nfs: /var/lib/nova/mnt/4e5299ba6e7bf5350915eef249c29c9a: device is
busy\numount.nfs: /var/lib/nova/mnt/4e5299ba6e7bf5350915eef249c29c9a:
device is busy\n'
2014-05-23 06:23:04.654 32179 TRACE nova.virt.libvirt.volume

Does Nova support such live migration (IceHouse) when NFS-based volume is
attached?

Thanks,
Taras
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