Public bug reported:
On live migration (with root disk on NFS) nova cannot unmount attached volume
(located also on NFS) and fails to migrate the instance:
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
Nova should not even try to unmount it before the live migration.
** Affects: nova
Importance: Undecided
Status: New
** Tags: migration nova
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https://bugs.launchpad.net/bugs/1323590
Title:
Shared storage live migration with attached NFS-based volume does not
work
Status in OpenStack Compute (Nova):
New
Bug description:
On live migration (with root disk on NFS) nova cannot unmount attached volume
(located also on NFS) and fails to migrate the instance:
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
Nova should not even try to unmount it before the live migration.
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