[Pkg-libvirt-maintainers] Bug#775761: libguestfs incorrectly detects host CPU architecture

[Richard W.M. Jones]

On Tue, Jan 20, 2015 at 07:42:10AM -0800, Rogier wrote:
> > It looks as if libguestfs is configured wrongly, or maybe you've got
> > the 32 bit version of libguestfs installed on your system.
> 
> I do have a 32-bit version (my entire userland is still 32-bit - it 
> used to be the better choice, and as migrating to 64-bit is a major 
> operation, it is not a high priority...).
> 
> So the 32-bit version of libguestfs assumes that the qemu version of 
> choice must also be 32 bit, but then it chooses to boot a 64-bit 
> kernel ?

You can choose which kernel gets booted by setting up some environment
variables.  See the manual page here:

http://libguestfs.org/supermin.1.html#USING-A-CUSTOM-KERNEL-AND-KERNEL-MODULES

Basically just:

export SUPERMIN_KERNEL=/boot/my-vmlinuz
export SUPERMIN_KERNEL_VERSION=3.XX.0
export SUPERMIN_MODULES=/lib/modules/3.XX.0

Of course, it means you must have a 32 bit kernel for this to work,
and supermin will need to find 32 bit binaries and so on.

Alternative is to set LIBGUESTFS_HV=/usr/bin/qemu-system-x86_64
which seemed to work for you.

Rich.

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