VM-Friendly Networking on Kubernetes: Customizable Networks, Live Migration, and Best Practices
summary
OVN-Kubernetes and KubeVirt combine to add userdefined networks to Kubernetes: namespace-scoped and cluster-scoped CRDs that create isolated L2/L3 overlays, allow overlapping subnets, and offer persistent IPAM so VMs can request static IPs. Demo shows a VM with IP 192.168.0.18 live-migrating across nodes on a Layer‑2 UDN with traffic continuing (a brief throughput dip only), and route advertisement via FRR/FRR Kubernetes exports UDN subnets to the provider network for non‑NATed reachability. The default CNI stays as an infra-only interface for kubelet health checks.
AI-written summary · about
chapters (11)
- 0:00VM-friendly networking intro
- 1:23Kubernetes networking basics
- 5:17Network policy limits for VMs
- 6:19VM networking model
- 8:29Open-source VM networking projects
- 10:13User-defined networks
- 17:58Demo: isolated user-defined networks
- 25:03Live migration on L2 networks
- 31:25BGP routable VM IPs
- 34:17Key takeaways
- 35:45Q&A
related talks
25mKubeVirt VMs for migratable inceptionist clusters
33mMulti-tenant K8s Networking with Kube-OVN
01h 21mTutorial: Mind Your Pod's Business: Netwo...
23mOptimizing Live-Migration for Minimizing Packet Loss With KubeVirt and...
37mHigh Performance Networking with Kubevirt
22mConnecting virtual machines in the cloud age
32mUser Defined Networks: Gateway to Secure Multi-Tenancy
36mVPCs for Everyone: Multi-Tenancy and Advanced Networking with kube-OVN