Singularity support in KIP provider

[GuopingJia]

We are integrating the Singularity to our K8s cluster, rather than using Docker as container runtime, esp., for HPC workloads. Is the Singularity container runtime supported in Kip provider ? so we can deploy Kip and try the cloud bursting to other public cloud providers.

This probably a question to Virtual Kubelet. But there could be something that's required or supported in Kip provider. We are interested in a heterogeneous cluster with multiple container runtimes, esp., the kip provider node running Singularity. Thank you !