error no kernel found

[raxa04]

Hello,
I'm trying to migrate vm from an old linux xen server 4.4 to a new server and use the xen2xcp (https://github.com/xcp-ng/xen2xcp) script provided for that. I've also copied the vmlinuz and initrd into /boot/gest.
But when I start the vm, it refuses with the error :

xcp-ngFailed: Internal error: xenopsd internal error: VM = 6813d025-efa3-e52a-6069-d6defaba14f7; domid = 2; Bootloader.Bad_error No kernel found in

So I guess the vm don't recognize the kernel and ram disk but why ? and how to fix it ?

[TeddyAstie]

Hello,

You can try to convert the offending VM to HVM mode to avoid having to use PV boot (which is not really supported anymore in XCP-ng 8.3).

[raxa04]

@TeddyAstie thx a lot,
apart from installing grub on the disk, is there anything else to do ?

[olivierlambert]

No, as long as you have Grub installed and the right boot sector configured, that's it

[raxa04]

Ok so after a long week on other problems I can get back to my migration issue.
I'm trying to boot from a live environment to add grub, but it just plain tell me that there is no bootable device...

[olivierlambert]

Enable the "boot flag" option in the table

[raxa04]

still doesnt want to boot with ether two of the disk or bath check as bootable
from what I know of the disk with my previous try, it just a partition without anything, not even a mrb.

[Davidj 0]

@raxa04
What's at the top of the Advanced tab for this VM?

[raxa04]

@Davidj-0

[Davidj 0]

@raxa04
You should follow @TeddyAstie's recommendation. To do that, click on "Convert to HVM".

[raxa04]

welp,
I converted the vm to hvm, manage to install grub by copping the migrated disk into another disk with a partition table, then install grub2 by mount it then chroot into it.
When I boot in hvm I land into the bios with no bootable device,
When I convert the vm back to pv I get the error

INTERNAL_ERROR(xenopsd internal error: Domain.Domain_build_pre_failed("Calling 'shadow_allocation_set 51 MiB' failed: Xenctrl.Error(\"22: Invalid argument\")"))

so I'm back to square one

[raxa04]

ok, so I was wrong, the vm boot ! But as you can see I now have a strange space collision, any idea ?


when I boot in recovery mode, I can get into linux, so I know it almost work.