維運Kubernetes的兩三事
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This document provides an overview and outline of topics related to operating and maintaining Kubernetes in production environments. It discusses considerations for self-hosting Kubernetes versus using managed Kubernetes services, techniques for managing stateful applications, logging and monitoring, continuous delivery practices, troubleshooting, and trends in Kubernetes technologies. The document also provides references and advice for using kubectl effectively when managing multiple Kubernetes clusters and namespaces.
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維運Kubernetes的兩三事
- 1. Something About . . . Operation/Maintenance Kubernetes
- 2. Hello! I am Tom Tsai aka smalltown 2
- 7. Select Where Your Kubernetes is! 7 Public Cloud No Yes Completed Network Infra. General Usage Yes Yes No Shutdown Suddenly No Yes No
- 8. When Should I Self-Hosted Kubernetes ◂ ◂ ◂ 8
- 10. High Availability: Kubernetes Itself 10 - Key/Value Storage - apiserver - scheduler - controller-manager - kubelet - kube-proxy - container runtime- HA: 1, 3, 5 … - Clustering Guide - General HA Mode
- 11. High Availability: Application in K8S ◂ 11 ~$ kubectl get deployment NAME DESIRED CURRENT UP-TO-DATE AVAILABLE AGE Nginx 3 3 3 3 18s
- 12. Before Talk About Scalability . . . 12
- 13. K8S Resource Request & Limit 13 Ref
- 14. Scalability: Horizontal Pod Autoscaler 14 Ref
- 15. Scalability: Vertical Pods Autoscaler 15 Ref
- 19. Manage Production Service 19 Stateless Stateful Setup Scale Out/Up Backup Upgrade Operation
- 20. CoreOS Brings K8S Operator . . . 20
- 21. What is Kubernetes Operator? ◂ ◂ ◂ 21
- 22. What is Kubernetes Operator? 22 An Operator is a Domain Specific Controller
- 23. Operation of Stateless Service 23 kubectl ReplicaSet app=web, env=prod Pod app=web env=prod scale up desired=3 count=1 kubectl ReplicaSet app=web, env=prod Pod app=web env=prod desired=3 count=3
- 24. Operation of Stateful Service (Operator) 24 backup kubectl etcd Operator app=3.0.13 size=3 Pod app=web env=prod backup-tool interval=300s
- 27. Log Management . . . 27
- 28. Log Management: Yes, ELKF ◂ ◂ ◂ 28
- 29. Log Collect Centralised V.S. Decentralised ◂ ◂ ◂ 29
- 30. System/Application Metric Collect . . . 30
- 32. Get Alert When Service . . . 32
- 36. Common Resource View of K8S Application 36 Deployment YAML ConfigMap YAML Secret YAML/VaultDocker Image Tag Service YAML
- 38. The Key Man: Helm ◂ ◂ ◂ 38
- 40. Good Old Days V.S. Kubernetes 40 GNU/Linux ELF Binaries Config in /etc apt, yum, etc Chef, Puppet, Ansible Kubernetes Images K8S Object Helm Operator Framework
- 41. CI/CD Total Solution For K8S ◂ ◂ ◂ ◂ ◂ 41
- 45. Just My Two Cents: Pod ◂ Pending ◂ Terminating ◂ CrashLoopBackOff 45
- 46. Just My Two Cents: Service ◂ Endpoint is Empty ◂ ◂ ◂ 46
- 47. Just My Two Cents: Node Register ◂ ◂ ◂ ◂ 47
- 48. 1. Your Best Friend: kubectl Good Craftsmanship Depends on Use of The Right Tools
- 49. When You Manage N Clusters N Namespaces ◂ ◂ ◂ ◂ ◂ 49
- 50. There Are Several Helper Tool For You ◂ ◂ ◂ ◂ 50 Ref
- 51. 1. Kubernetes Trends Where Kubernetes is Going?
- 52. Kubernetes Move So Fast... ◂ ◂ ◂ ◂ 52