Unfortunetaly i tried this before send these mails,

The fact is that the qcow2 format don't permit to convert a file with this option, that's why i wanted to build the image directly including these options.

Le 2022-04-25 17:11, Richard W.M. Jones a écrit :

On Mon, Apr 25, 2022 at 04:40:15PM +0200, Nguetchouang Ngongang Kevin wrote:

I want to achieve the external data file creation

"qemu-img create -o data_file_raw=on,data_file=path/to/file"

but there is no way to specify those options while using virt-builder.

Interesting - I had no idea about this feature before.

At the moment it's not possible to do this within virt-builder,
without patching virt-builder.  I guess maybe you can post-convert the
file after virt-builder has run?

I grepped the source of virt-install and it doesn't seem like it has
support either.  Nor does libvirt.

It should be possible to use virt-customize on these special qcow2
files, although I didn't try it.

Rich.