Re: [Libguestfs] Migrating file based Xen RHEL5.4 to KVM

On Mon, May 17, 2010 at 08:13:16PM +0200, Martin Jeppesen wrote: No, it's way more complex than that in virt-v2v. "yum install kernel" runs /sbin/new-kernel-pkg which (eventually) runs plain mkinitrd. Unfortunately that just makes an initrd suitable for the current (ie. pre-migration) hardware. What you have to do is to run mkinitrd with all the right parameters (by examining /sbin/new-kernel-pkg by hand) plus some extra parameters to install the virtio drivers, something like 'mkinitrd --preload=virtio_blk [...]'. You need at least the block driver in order to boot, and after booting you should probably run /sbin/new-kernel-pkg again. IMHO it would be better for the kernel to ship with a standard initrd that does everything possible. dracut was meant to solve these issues, but in reality it's just a much slower replacement for mkinitrd. (Also they should have just used Debian's initramfs.) Anyway, I'd suggest you use virt-v2v. It supports file-based guests just fine. Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones virt-p2v converts physical machines to virtual machines. Boot with a live CD or over the network (PXE) and turn machines into Xen guests. http://et.redhat.com/~rjones/virt-p2v