K8s doesn't support orchestrating LXC/LXD containers as far as I know. What I did was to use LXD containers as hosts/nodes for K8s. So, it was basically applica

K8s doesn't support orchestrating LXC/LXD containers as far as I know. What I did was to use LXD containers as hosts/nodes for K8s. So, it was basically application containers/pods and K8s running inside system containers. In addition, there are orchestrators which can run LXC containers (LXD is a management layer over LXC). Hashicorp Nomad is noteworthy. Added later: K8s runs OCI containers. All OCI containers I have seen are application containers. I don't know if OCI specification supports system containers.