On Thu, Mar 06, 2025 at 12:34:43PM -0000, DJ B wrote: Not much information here. How did you obtain libguestfs, what version, how are you running the Ruby program, etc etc? Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com virt-p2v converts physical machines to virtual machines. Boot with a live CD or over the network (PXE) and turn machines into KVM guests. http://libguestfs.org/virt-v2v

On Mon, Mar 10, 2025 at 05:01:35AM -0000, DJ B wrote: I don't exactly know why it can't find it. It's likely to be a packaging problem with Ubuntu. The file it's looking for is called something like '/usr/lib64/ruby/vendor_ruby/_guestfs.so' (perhaps with a different path). If you can find that file, you could set $RUBYLIB to point to the directory. In Fedora it works fine, after installing the ruby-libguestfs package, without any need to set environment variables: $ irb irb(main):001> require 'guestfs' => true irb(main):002> g = Guestfs::Guestfs.new() => #<Guestfs::Guestfs:0x00007f217ca65550> Also if you build from source you can use the ./run script which sets up the environment variables correctly for Ruby: https://github.com/libguestfs/libguestfs/blob/01909c51ff54c7f3f31c566f6cc... 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

I found a file "_guestfs.so" inside /var/lib/docker/overlay2. Looks like this is docker related as I'm installing it through a dockerfile

As I investigate further by sudoing inside the docker container, I've found the file under '/usr/lib/x86_64-linux-gnu' and was able to overcome the cannot find error. I got LoadError: incompatible library version now, what version of libguestfs would be compatible with the ruby version I'm running? Thanks

On Tue, Mar 11, 2025 at 07:05:57AM -0000, DJ B wrote: "LoadError: incompatible library version" is a Ruby error. It means the version of the Ruby interpreter is incompatible / not the same as the version for which the extension was compiled. See: https://github.com/ruby/ruby/blob/47c3ae6962900434b6ffd486decd639b76f3d54... Again, this is likely because of some packaging problem in Ubuntu, or some docker / container problem. Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com virt-top is 'top' for virtual machines. Tiny program with many powerful monitoring features, net stats, disk stats, logging, etc. http://people.redhat.com/~rjones/virt-top