Clusters as Cattle: How to Seamlessly Migrate Apps Across Kubernetes Clusters
summary
Shows a reproducible procedure: use Ansible + kubeadm to provision a new Kubernetes 1.10 cluster, take an on-demand backup of a 1.9 cluster with Heptio Ark to Minio, restore that namespace and PVs into the new cluster, and place an external Envoy + Contour routing cluster in front. Demo runs a 5‑second load test (~340 requests), shifts traffic 90/10 to the new cluster, then flips to 100% and removes the old backend with zero downtime.
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chapters (40)
- 0:00Introduction
- 0:22Agenda
- 0:45ENIAC
- 1:06Punchcards
- 1:47File tickets
- 2:08Cloud computing
- 3:00Containerization
- 3:56Kubernetes
- 5:20Kubernetes Roles
- 5:58Installing Packages
- 6:39Enabling SystemD
- 6:53Changing Kubernetes Version
- 7:30Using Core DNS
- 8:42Applications
- 10:19Backups
- 11:11Scenario
- 11:51Networking in Kubernetes
- 14:06My solution
- 14:20My routing cluster
- 15:13Backend cluster
- 15:45Custom control logic
- 16:09Finding ingress objects
- 17:06Demo
- 18:17Cordy
- 18:35Weighted Cluster
- 19:08Backend Cluster 1
- 19:44Load test
- 20:08Create ARC backup
- 20:25Request ARC backup
- 20:44New Kubernetes Cluster
- 21:04Install Arc
- 21:45Migrate Cluster 1
- 22:31Add Cluster 2 as a Backend
- 22:45New Annotations
- 23:30Annotations with CubeControl
- 23:41Weighted Clusters
- 24:04Load Testing
- 24:42Changing Weights
- 24:59Cluster 2 at 100
- 26:39Questions
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