Transparent Live Migration of Services Between Kubernetes Cluster
summary
ArangoDB proves live, cross-region and cross-cloud migration of stateful clusters with its Kube-Arango operator, migrating individual DB members one-by-one across over 200 Oasis deployments while keeping availability. Two practical mechanisms work: Cilium Cluster Mesh for full-cluster moves and service load balancer endpoint mapping for per-deployment moves. DNS propagation can take up to 24 hours, cloud load balancers add ~1–2 ms latency, port-forwarding adds ~40 ms and was rejected, and the demo moves three members sequentially with no user-visible downtime.
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chapters (8)
- 0:00Introduction and motivation
- 2:27Database operational context
- 6:16Operational challenges
- 9:43Migration requirements
- 15:11Implementation strategies
- 20:08Migration procedure
- 23:38Live demo and validation
- 26:43Lessons and future outlook
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