[libvirt-users] username and passwd after create VM from XML dump

[Yuanzhen Gu]

On Wed, Aug 6, 2014 at 3:07 PM, Eric Blake <eblake at redhat.com> wrote:

> On 08/06/2014 12:10 PM, Yuanzhen Gu wrote:
> >     Just one more question to make me clear in this point, so if I
> install
> > an application in the guest, and make a dmup XML, then     create a new
> > guest using that configured dump XML file, the new guest should also have
> > that application installed?  and the username and password of the new
> guest
> > should be the same as the previous guest?   thanks a lot!
>
> dumpxml is only half a guest.  A guest consists of the hardware it is
> running on (dumpxml) and the contents of the disks (storage volumes).
> To create a clone, you need to copy and modify both the dumpxml domain
> description, AND do a clone (or share a common base file, using qcow2
> overlays) of the disk elements (where part of your xml edits is pointing
> to the just-cloned storage).  Furthermore, if you expect both the
> original and the new guest to ever run in parallel, it is a very wise
> idea to do other changes to the disk contents (which is why I pointed
> you to libguestfs' virt-sysprep).  For example, if you forget to nuke
> the guest's random number seed, then both the original and the guest
> will be using the same random number stream when they first boot, which
> is a security hole waiting to happen because random streams are not
> supposed to be predictable.
>

    Thank you very much Eric !

>
> --
> Eric Blake   eblake redhat com    +1-919-301-3266
> Libvirt virtualization library http://libvirt.org
>
>
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