I'm trying to figure out if Kubernetes will work for a certain use case. I understand the networking/clustering concept, and even the load balancing and how that can be used with things like nginx. However, assuming this is not deployed on a public cloud and things like ELB won't be available, could it still be used for a high-speed networking application using DPDK? For example, if we assume the cluster networking provided by k8s is only used for the control/management path, and the containers themselves handle the NIC directly with DPDK, is this something it's commonly used for?

Secondly, I understand the replication controller and petsets feature I think, but I'm not really clear on whether the intent of those features is for high availability or not. It seems that the "pod fails and the RC replaces it on a different node" isn't necessarily for HA, and there aren't really guarantees on how fast it builds a new pod. Am I incorrect?