[libvirt-users] Migrate KVM Guest OS failed

[Osier Yang]

于 2011年07月18日 08:54, zhang xintao 写道:
> Dear All
>           I used Virsh  live Migrate KVM Guest OS failed
>           error: unable to set user and group to '104:106' on
> '/mnt/run2/N2-WINDOWS-XP-1':Invalid argument
>
>           /mnt/run2/ is a directory of local nfs server
>           another host using nfs client share this directory
>
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commit 62ed801c13787cc844e75db7cd2d4c8a42454fcc
Author: Laine Stump<laine at laine.org>
Date:   Fri Jun 3 11:59:09 2011 -0400

     security driver: ignore EINVAL when chowning an image file

     This fixes:

       https://bugzilla.redhat.com/show_bug.cgi?id=702044
       https://bugzilla.redhat.com/show_bug.cgi?id=709454

     Both of these complain of a failure to use an image file that resides
     on a read-only NFS volume. The function in the DAC security driver
     that chowns image files to the qemu user:group before using them
     already has special cases to ignore failure of chown on read-only file
     systems, and in a few other cases, but it hadn't been checking for
     EINVAL, which is what is returned if the qemu user doesn't even exist
     on the NFS server.

     Since the explanation of EINVAL in the chown man page almost exactly
     matches the log message already present for the case of EOPNOTSUPP,

     I've just added EINVAL to that same conditional.


The above commit fixed your problem, you might mount the nfs on the dest

host in readonly mode. So you have two choices to work around the problem, 1) update
libvirt with this fix, unfortunately, the fix is in realeases since 0.9.2. 2) mount
your nfs in proper permission mode on destination host.

Regards
Osier