Re: [Libguestfs] [PATCH virt-v2v 2/3] test-data/phony-guests: Allow virt-v2v to work against phony Fedora

On Wed, Jun 08, 2022 at 05:49:01PM +0100, Richard W.M. Jones wrote: Surprisingly this works even on !x86-64. I just tested it on aarch64. Here: https://github.com/libguestfs/virt-v2v/blob/0d1b2ec1b733db1ca0bebf2e4a9e8... we use guestfs_file_architecture on a kernel module to determine the architecture of the kernel. Because we uploaded an x86-64 binary this means we detect the kernel as being x86_64: installed kernel packages in this guest: * kernel 5.19.0-0.rc1.14.fc37.x86_64 (x86_64) <------- ki_arch /boot/vmlinuz-5.19.0-0.rc1.14.fc37.x86_64 /boot/initramfs-5.19.0-0.rc1.14.fc37.x86_64.img no config /lib/modules/5.19.0-0.rc1.14.fc37.x86_64 1 modules found virtio: blk=true net=false rng=false balloon=false pvpanic=false vsock=false xen=false debug=false Then we run dracut, which would fail on a real guest if the host is aarch64, but succeeds here because the phony dracut binary is aarch64: libguestfs: trace: v2v: command "/sbin/dracut --verbose --add-drivers virtio_blk /boot/initramfs-5.19.0-0.rc1.14.fc37.x86_64.img 5.19.0-0.rc1.14.fc37.x86_64" Later: gcaps_block_bus = virtio-blk gcaps_net_bus = e1000 gcaps_virtio_rng = false gcaps_virtio_balloon = false gcaps_isa_pvpanic = false gcaps_virtio_socket = false gcaps_machine = i440fx gcaps_arch = x86_64 <--------- gcaps_acpi = true gcaps_virtio_1_0 = false gcaps_default_cpu = true Anyway this is kind of a bug in virt-v2v (because it should reject conversion of a !hostarch guest), and also in this test, but this is a fairly obscure corner case so I guess I'll leave it for now. 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