VPCs in Kubernetes
summary
A working lab CNI is implemented in Go (~450 lines) that uses custom CNI using VXLAN plus Multus to attach interfaces, netlink libraries for device setup, and a BGP EVPN control plane with BGP EVPN route reflectors (run as a small HA pair) to distribute VNIs and routes. Pods on separate nodes ping and transfer data over the isolated VXLAN overlay; IPAM is simple (hardcoded in demo) and real deployments need IPAM and network-policy support. VXLAN ID limits (~16M) and offload to DPUs are discussed for scale and performance.
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chapters (7)
- 0:00Introduction and agenda
- 1:57Defining the VPC concept
- 3:06Understanding the CNI interface
- 9:38Building a custom CNI
- 16:54Advanced routing with BGP EVPN
- 23:22Future trends and infrastructure
- 31:41Q&A session
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