[Libguestfs] few things I found about virt-p2v

[Richard W.M. Jones]

On Sat, Mar 30, 2019 at 05:19:55PM +0300, Hetz Ben Hamo wrote:
> >
> >
> > > I did, and I'm enclosing gzipped copy of the file. Line 4197 clearly
> > shows
> > > it got the correct parameter:
> > > Initializing the target -o libvirt -os NAS-10G
> >
> > Ah I see.  This is a limitation:
> >
> >
> > https://github.com/libguestfs/libguestfs/blob/f79129b8dc92470e3a5597daf53c84038bd6859e/v2v/output_libvirt.ml#L107
> >
> >
> I see. This situation is great if someone wants to move 1 VM from Hyper-V
> (for example) to a laptop or to a workstation where he/she is using
> virt-manager.
> 
> 
> > Actually not one that I recall from before (the vast majority of
> > people using virt-p2v are either creating a file or writing to
> > RHV/OpenStack/etc).
> >
> 
> I got 2 more questions:
> 
>    1.  Is it possible to add to the virt-p2v-make-disk program a parameter
>    to add kernel parameters? (right now I have to create the image and edit
>    manually the grub.conf file in the image in order to edit them) - this
>    could help in situations where someone cannot setup PXE.

The real issue here is what file in the image to edit and how.

You could try editing virt-p2v-make-disk (or a local copy of it) and
add something to the long virt-builder command right near the end of
the file.  I would suggest adding an --edit option such as:

  --edit '/etc/grub/grub.conf: s/linux (.*)/linux $1 your_parameter=foo/' \

>    2. Is there a way to create the image as a bootable ISO? Hyper-V for
>    example, doesn't like standard "hard disk" images. I see that kiwi has this
>    functionality, but it's only for SuSE.

I actually tried at one point to create a bootable ISO from a
virt-builder image, but totally failed to make anything work ...
You could try the kickstart approach (ie. virt-p2v-make-kickstart) but
then you're in a world of other painful tools such as livecd-creator.

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
libguestfs lets you edit virtual machines.  Supports shell scripting,
bindings from many languages.  http://libguestfs.org