[et-mgmt-tools] VMware/qemu-kvm-?? migration
Joey Boggs
jboggs at redhat.com
Fri Jul 17 12:59:23 UTC 2009
Gene Czarcinski wrote:
> On Thursday 16 July 2009 15:42:41 Gene Czarcinski wrote:
>
>>> Is the right SCSI driver available in the initrd? You should be able
>>> to find out what driver(s) are in the guest's initrd using
>>> virt-inspector.
>>>
>> Light bulb lights above head!
>>
>> Yup, yup ... thank you very much! The problem is that the needed drivers
>> are not in the initrd file.
>>
>> Now I know what the problem is but "fixing" it will need some thought.
>>
>
> OK, I got a "fix" that worked and the problem definitely was that the initrd file
> did not contain the right/needed drivers for the new hardware configuration.
>
> First: The guest is an i386 F9 system. Although the VMware guest used a SCSI
> adapter, I used a IDE adapter on qemu-kvm. I did not bother converting the
> file but just used a copy of the vmdk file.
>
> To get a good initrd file: Bootup the F9 i386 distribution DVD and run rescue
> mode. Use scp to copy the "current" kernel and firmware rpms (the guest was
> not up-to-date). chroot the the guest's disks. Install the kernel and
> firmware rpms. Reboot to the updated guests ... everything works! Success!
>
> Before installing a new kernel rpm to get the updated initrd file, I tried just
> running mkinitrd for the rescue/chroot mode but this did not appear to
> generate a correct initrd file (it did not work). I used:
> mkinitrd /boot/initrd______.img <kernel_version>
>
> Whatever "dance" installing a kernel does to create a good initrd file, just
> running mkinitrd is not it. Any suggestions? It would be nice to just run
> mkinitrd to fix things.
>
>
I used to do this manually over a year ago, updating /etc/modprobe.conf
and then running mkinitrd should do the trick.
> Q: Does virt-p2v fixup initrd as part of its process? [No, I have not tried it
> yet]
>
> Since guestfish gives me access to the filesystems on a virtual disk, it would
> be nice if I could (easily) update the initrd to have the right drivers. This
> may not be practical since guestfish does not know what the guest's hardware
> configuration looks like ... running rescue-mod and chroot may be the best that
> can be used to fix things.
>
> Once I get the process down for migrating a Fedora guest from VMware to qemu-
> kvm, I will then look into the far bigger challenge of (ugh) Windows.
>
> Gene
>
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