Thanks, --security-info option is the right way to get vnc password in dumpxml mode.

On Tue, Sep 11, 2012 at 4:58 PM, Michal Privoznik <mprivozn@redhat.com> wrote:
On 11.09.2012 05:50, Timon Wang wrote:
> I use vnc with password for the vm graphics, it works well.
> When I want to dump the xml of the vm, I found that the dumped xml does
> not contains the password properties in the graphics node.
> But when I use virsh edit to check the xml of the vm,  I found the
> password is displayed.
>
> It's it a bug or it's just what libvirt designed to perform.

You need to pass --security-info to the dumpxml command:

    virsh dumpxml --security-info $domain

Michal
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Blog: http://www.nohouse.net