[Libguestfs] error during p2v unable to rebuild initrd

[Richard W.M. Jones]

On Thu, Jan 28, 2016 at 02:04:53PM +0100, arnaud.bougeard at univ-rennes1.fr wrote:
> Hello
> I have error virt-v2v: error: unable to rebuild initrd
> (/boot/initramfs-4.2.3-300.fc23.x86_64.img) because mkinitrd or dracut was
> not found in the guest
> 
> My physical machine run on fedora23
> 
> Boot on usb made from virt-p2v-livecd-1.32.0.fc23.iso
> <http://oirase.annexia.org/virt-p2v/virt-p2v-livecd-1.32.0.fc23.iso>

It does look like a bug, since dracut is no longer present in /sbin.

> libguestfs: trace: v2v: is_file "/sbin/dracut" "followsymlinks:true"
> guestfsd: main_loop: proc 89 (mv) took 0.05 seconds
> guestfsd: main_loop: new request, len 0x3c
> libguestfs: trace: v2v: is_file = 0
> libguestfs: trace: v2v: is_file "/sbin/mkinitrd" "followsymlinks:true"
> guestfsd: main_loop: proc 37 (is_file) took 0.00 seconds
> guestfsd: main_loop: new request, len 0x40
> guestfsd: main_loop: proc 37 (is_file) took 0.00 secondslibguestfs: trace: v2v: is_file = 0
> virt-v2v: error: unable to rebuild initrd 
> (/boot/initramfs-4.2.3-300.fc23.x86_64.img) because mkinitrd or dracut was 
> not found in the guest

The reproducer is simple too:

  $ virt-builder fedora-23
  $ virt-v2v -i disk fedora-23.img -o null
  [...]
  virt-v2v: error: unable to rebuild initrd 
  (/boot/initramfs-4.2.3-300.fc23.x86_64.img) because mkinitrd or dracut was 
  not found in the guest

Try this fix which works for me:

https://github.com/libguestfs/libguestfs/commit/569ad259b4726fbdabf380bdca34da00ca262e1e

Thanks,

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
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