Arukas only supports non-privileged containers. Also, do not have future plan to support to privileged containers.
Arukas is a shared hosting service that shares server resources with other customers. Docker container operating with privileged will be able to access other containers on the same host. Also, as with processes running outside the container on the same host, it will be possible to execute the process with the privileges of the host, so it is technically impossible to secure the security of the customer application.