OVN-Kubernetes The new default CNI of OpenShift
summary
OVN‑Kubernetes is the default CNI for OpenShift 4.12+ and replaces OpenShift SDN by layering OVN on top of OVS to provide centralized IPAM and logical switches and routers (nodes → switches, cluster router, per-node gateway routers). Services map to OVN load‑balancers, SNAT runs on gateway routers, and port‑security prevents IP/MAC spoofing. A kind‑based demo builds a cluster in ~5 minutes, deploys ovn‑db, ovn‑kube‑master and ovn‑kube‑node, and shows OVN logical entities translating into OVS openflow rules that actually enforce traffic.
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chapters (12)
- 0:00Introduction and agenda
- 1:15Kubernetes networking basics
- 2:29OpenShift networking overview
- 4:02Legacy OpenShift SDN
- 6:00Introduction to OVN-Kubernetes
- 8:34Reasons for moving to OVN-K
- 10:04Under the hood of OVN-K
- 14:39Cluster setup and demo prep
- 17:12Live demo components
- 20:25Logical networking demo
- 29:28Services and flows demo
- 32:33Q&A and conclusion
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