The images need to be built in separate steps because VirtualBox and KVM cannot reserve the needed CPU extension (VT-x, AMD-V) at the same time.
packer build --only=qemu debian-babelbox.json packer build --only=virtualbox-iso debian-babelbox.json
Due to image size reasons we do not include a Debian DVD ISO image into the
image. Therefore the VMs have to be booted into the regular OS (first Grub menu
option). Login as user
demo with password
babelbox and download a Debian
DVD ISO image into
cd /srv sudo wget https://cdimage.debian.org/debian-cd/10.3.0/amd64/iso-dvd/debian-10.3.0-amd64-DVD-1.iso
The version might be different but 10.3.0 has been used for my tests.