
Multi-Site Kubernetes Cluster with BGP Anycast
The engineering question How do services stay reachable when a site or path fails? I built and operate the routing and cluster integration in my own lab, using BGP, VPNs and Cilium. The result is a working environment for observing routing and service-discovery behaviour, with the architecture described below. It does not establish an availability guarantee; the next useful work is repeatable recovery measurement. The June 2026 inventory counted 13 Kubernetes nodes across two sites: 7 in the Netherlands and 6 in Greece. Earlier references to 7 described the Netherlands cluster alone. A Netherlands snapshot from 28 October 2026 still records 7; a comparable current whole-estate count has not been verified. Historical counts are not live capacity. ...
