Ubuntu cloud-images fail after mutation due to having 2 disk images

[TJ]

I've been attempting to use Ubuntu Vagrant boxes with vagrant-libvirt locally and hitting a lot of problems after using vagrant-mutate to convert the VirtualBox box to libvirt!

After solving or working around several bugs in vagrant-libvirt itself I found the guest image would boot but never bring up any network so "vagrant up" fails eventually.

This affects the Ubuntu cloud-image boxes since they are for VirtualBox and contain 2 disk images: the root-fs and the cloud-init data. E.g the ubuntu/bionic64 image when mutated results in only 1 disk image (the cloudimage-configdrive is not mutated):

boxes  ubuntu-VAGRANTSLASH-bionic  0  find . -ls
   270462 4 drwxrwxr-x 4 tj tj 4096 Jul 29 17:43 .
   270457 4 drwxrwxr-x 2 tj tj 4096 Jul 29 17:43 ./libvirt
   262177 1028044 -rw-r--r-- 1 tj tj 1052704768 Jul 29 18:21 ./libvirt/box.img
   267960 12 -rw-rw-r-- 1 tj tj 136 Jul 29 17:43 ./libvirt/Vagrantfile
   267827 12 -rw-rw-r-- 1 tj tj 57 Jul 29 17:43 ./libvirt/metadata.json
   270463 4 drwxrwxr-x 2 tj tj 4096 Jul 28 13:15 ./virtualbox
   268076 80 -rw-r--r-- 1 tj tj 72192 Jul 28 13:15 ./virtualbox/ubuntu-bionic-18.04-cloudimg-configdrive.vmdk
   268075 307892 -rw-r--r-- 1 tj tj 315267584 Jul 28 13:15 ./virtualbox/ubuntu-bionic-18.04-cloudimg.vmdk
   268074 12 -rw-r--r-- 1 tj tj 310 Jul 28 13:15 ./virtualbox/ubuntu-bionic-18.04-cloudimg.mf
   268066 20 -rw-r--r-- 1 tj tj 11061 Jul 28 13:15 ./virtualbox/box.ovf
   268071 12 -rw-r--r-- 1 tj tj 478 Jul 28 13:15 ./virtualbox/Vagrantfile
   268072 12 -rw-r--r-- 1 tj tj 31 Jul 28 13:15 ./virtualbox/metadata.json