Kubernetes scalability: Federation & Cluster API

Kubernetes scalability: Federation & Cluster API for Cloud Native London conference 2019

Transcript

1. Katie Gamanji Cloud Platform Engineer Condé Nast International @k_gamanji katie-gamanji
2. Kubernetes scalability: Federation & Cluster API @k_gamanji katie-gamanji
3. Condé Nast International has set the benchmark for print and digital publishing with a heritage of more than 110 years.
5. Markets 11 Websites 62 Unique users 200m Digital readership 1.1bn
8. Federation v2 Cluster API
9. Federation v2 Cluster API
10. Federation v2 Cluster API
11. Federation v2
12. Federation v2 Mechanism for managing applications and services in multiple Kubernetes clusters tracked by the Kubernetes cluster registry.
13. Federation v2 SIG multicluster: • Federation ◦ v1 - deprecated ◦ v2 (alpha) - requires v1.13 • Cluster registry ◦ maintain list of clusters and associated metadata
14. 1 / 4
15. Host cluster Member clusters 2 / 4
16. Host cluster Member clusters Cluster registry Federation APIs 3 / 4
17. Host cluster Member clusters Control plane 4 / 4 Applications & services
18. Federation v2 Cluster placement • targeted clusters by the federation Configuration overrides • patches to federated resources
19. Federation v2 Cluster Placement • clusters spec: placement: clusters: - name: cluster2 - name: cluster1 • clusterSelector spec: clusterSelector: matchLabels: region: eu-central-1
20. Federation v2 Configuration overrides • Replace (default), add or remove spec: overrides: - clusterName: cluster1 clusterOverrides: - path: "/spec/replicas" value: 5
21. apiVersion: types.kubefed.io/v1beta1 kind: FederatedDeployment metadata: name: nginx-deployment spec: template: spec: replicas: 3 [...] placement: clusters: - cluster2 - cluster1 overrides: - clusterName: cluster2 clusterOverrides: - path: "/spec/replicas" value: 7
22. Federation v2 DEMO https://asciinema.org/a/caUpnqVCUz2PP1Fui wPiDQfkj
23. Resource management Namespace scoped control plane Conditional scalability Takeaways Higher level behaviour
24. Cluster API
25. Unique users Unique users Total digital readership 9m 62m 360m Russia China
26. Cluster API Provision of declarative APIs for cluster creation, configuration, and management.
27. Cluster API SIG-cluster-lifecycle: • Initial release: April 2019 • API: v1alpha2
28. Cluster API • Cluster - CIDRs for pods and services + DNS suffix • Machine - kubelet and control plane versions • MachineSet • MachineDeployment
29. 1 / 3
30. Management cluster Target clusters 2 / 3 • core • bootstrap • infrastructure providers
31. Management cluster Target clusters 3 / 3 • core • bootstrap • infrastructure providers
32. Cluster API DEMO https://asciinema.org/a/caUpnqVCUz2PP1Fui wPiDQfkj
33. Building blocks Cloud agnostic Experimental Takeaways
34. Federation v2 Cluster API
35. References Federation v2 • https://github.com/kubernetes-sigs/ federation-v2 ClusterAPI • https://cluster-api.sigs.k8s.io
36. https://www.condenastinternational.com/careers @k_gamanji katie-gamanji