Kubernetes Architecture Blog

VXLAN Encapsulation Series: Demystifying Cross-Node Pod Traffic in Kubernetes - Part 1

In Kubernetes environments, a very frustrating issue can happen: traffic between Pods on the same node works perfectly, but communication between Pods on different nodes hangs on large requests. Small packets like pings or basic TCP connections cross the nodes without any problem. However, larger transfers like TLS handshakes or

ARP-based "load balancing" on Kubernetes: one node does all the work!!!

💡 kube-vip, MetalLB L2, Cilium L2 announcements, keepalived: these are different tools, but they all use the same trick. None of them give you load balancing. They give you a highly available VIP. (A VIP is a virtual IP address that can move between nodes.) That is not the same