Keynote: Extending Kubernetes: Application Orchestration to 1000’s of Clusters in...
summary
Walmart runs a GitOps control plane that extends Kubernetes to orchestrate Helm releases across thousands of clusters in edge and cloud, using a hub‑and‑spoke model where a central control cluster generates multi-cluster application specs reconciled into per-cluster specs and synchronized to lightweight endpoint controllers that trigger Kubernetes jobs for deployments. Fleet targeting is 80% platform fleets / 20% custom label selectors, an index under index <1KB keeps edge syncs tiny, and real issues include etcd scaling (2GB→8GB) and cross‑cluster finalizers.
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chapters (10)
- 0:00Walmart’s cloud native platform
- 1:51GitOps architecture
- 3:38Extending Kubernetes with custom resources
- 5:22Hub and spoke design
- 6:47Fleet orchestration
- 8:11Scaling edge and cloud
- 9:59Custom control plane solution
- 11:43Lessons learned
- 13:50What worked and what didn’t in our implementation
- 15:15Key takeaways and future
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