I use Hashicorp’s Packer to produce an OVA file for an appliance we distribute based on a CentOS ISO. This requires either Virtualbox or VMware. I would not expect to be able to install VMware on a CircleCI build host due to licensing, and Virtualbox won’t run inside the Xen environment that the CircleCI build containers run in (VirtualBox does not support nested virtualization).
This may be a long shot, but does anyone know of a way to produce an OVA file from a CentOS ISO inside the CircleCI environment?