Inside the cluster my containers are Linux only. I don't believe kata-containers supports Windows containers as I don't think rust-vmm, which is used by CloudHypervisor[0], or the kata internal execution agent support it.
If I wanted to run Windows in the cluster I'd probably have to look at KubeVirt[1]. KubeVirt is oriented towards getting traditional VM workloads (ones you'd run in QEMU, Hyper-V, etc) functioning in a Kubernetes environment. While kata-containers is oriented towards giving container runtime based workloads (images that run on docker, containerd, CRI-O) the protection of virtualization, with minimal friction.
Previously external to the cluster I had some Windows VMs hosted on QEMU/KVM + libvirt for experimentation with Linux and Active Directory integration, but they've since been deleted. The only remaining traditional VMs I have are 2 DNS servers and one OpenBSD server for serving up update images to my routers.
For network infra I have a number of VyOS[2] firewalls both at the edge and between VLANs, and Mikrotik devices for switching.
Yeah sure, what is your network infrastructure too? :)
Are all the containers Linux only, or other OSes too?