Kubernetes kube-proxy Modes: iptables and ipvs, Deep Dive

In this video, we will have an in-depth discussion on Kubernetes kube-proxy and will discuss how its supported modes iptables and ipvs result in different load balancing schemes. We will also discuss what iptables and ipvs are and how they provide load balancing and how to configure kube-proxy to use ipvs. Finally, we will summarize the benefits of ipvs mode is superior to iptables mode and also in what situations kube-proxy falls back to iptables.

Links:
Demo scripts: https://github.com/gary-RR/myYouTube_...

Timecodes
0:00 - Intro
2:35 - Quick overview of Kubernetes PODs, services, and kube-proxy and their relationship.
5:34 - Quick into to Linux iptables.
10:07 - How load balancing works in iptables mode.
21:56 - Intro to Linux ipvs load balancing system.
27:01 - Demo: Setup an ipvs load balancer for VM-hosted service.
33:31 - Demo: How to configure Kubernetes to use ipvs during Kubernetes cluster setup.
49:50 - Demo: How to configure Kubernetes to use ipvs for an existing Kubernetes cluster.
54:18 - Summary of advantages of ipvs mode over iptables mode.
57:18 Situations where Kubernetes falls back to iptables.

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