Well, I came here to learn some kubernetes networking and I do have to say that the 4th paragraph…
Gonzalo Infante

Things get even more complex and interesting when the k8s SDN is overlayed over the infra SDN like openstack which has its own set of virtual interfaces to take the traffic along. So a packet flow from container namespace to vm and then to hypervisor and then to another hypervisor ,vm and container . I tried to write how packet flow in kvm works (https://medium.com/@jain.sm/network-packet-flow-in-kvm-qemu-dc79db719078).