Container Orchestration 之爭已經落幕，Kubernetes 成為主流，AWS, Azure 跟 GCP 都已提出相對應的解決方案， 但該選擇廠商所提供的服務或是自己架設呢？如何把 Stateless 甚至是 Stateful 應用服務運行於其上呢？部署應用程式到 Kubernetes 之中該如何做比較好？本分享談及多次在公司導入及維運 Kubernetes 的相關經驗，讓有興趣或是剛使用的人可以減少摸索的時間

1. Something About . . .
Operation/Maintenance
Kubernetes

2. Hello!
I am Tom Tsai aka smalltown
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3. “
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http://bit.ly/taipei-hug

4. “ Kubernetes
Production
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5. Outline
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6. 1.
Where is Your
Kubernetes?

7. Select Where Your Kubernetes is!
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Public Cloud
No
Yes
Completed
Network Infra.
General Usage
Yes
Yes
No
Shutdown
Suddenly
No Yes
No

8. When Should I Self-Hosted Kubernetes
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9. 1.
High
Availability/Scalability

10. High Availability: Kubernetes Itself
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- 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
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~$ kubectl get deployment
NAME DESIRED CURRENT UP-TO-DATE AVAILABLE AGE
Nginx 3 3 3 3 18s

12. Before Talk About
Scalability . . .
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13. K8S Resource Request & Limit
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Ref

14. Scalability: Horizontal Pod Autoscaler
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Ref

15. Scalability: Vertical Pods Autoscaler
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Ref

16. Scalability: Cluster Autoscaler
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Ref

17. 1.
Manage
Stateful Service

18. Stateful Service
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19. Manage Production Service
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Stateless Stateful
Setup
Scale Out/Up
Backup
Upgrade
Operation

20. CoreOS Brings
K8S Operator . . .
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21. What is Kubernetes Operator?
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22. What is Kubernetes Operator?
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An Operator is a Domain Specific Controller

23. Operation of Stateless Service
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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)
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backup
kubectl
etcd Operator
app=3.0.13
size=3
Pod
app=web
env=prod
backup-tool
interval=300s

25. Exist Operators
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26. 1.
Log/Monitoring

27. Log Management
. . .
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28. Log Management: Yes, ELKF
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29. Log Collect
Centralised V.S. Decentralised
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30. System/Application
Metric Collect . . .
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31. Metrics: Yes, Prometheus
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32. Get Alert When
Service . . .
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33. Monitoring: Internal
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Ref

34. Monitor: External
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35. 1.
Continuous Delivery

36. Common Resource View of K8S Application
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Deployment YAML
ConfigMap YAML Secret YAML/VaultDocker Image Tag
Service YAML

37. Deploy With kubectl
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Ref

38. The Key Man: Helm
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39. Deploy With Helm
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Ref

40. Good Old Days V.S. Kubernetes
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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
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42. GitOps Patterns
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Ref

43. 1.
TroubleShooting
Guide

44. Official TroubleShooting Guide
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45. Just My Two Cents: Pod
◂ Pending
◂ Terminating
◂ CrashLoopBackOff
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46. Just My Two Cents: Service
◂ Endpoint is Empty
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47. Just My Two Cents: Node Register
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48. 1.
Your Best
Friend: kubectl
Good Craftsmanship Depends
on Use of The Right Tools

49. When You Manage N Clusters N
Namespaces
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50. There Are Several Helper Tool For You
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Ref

51. 1.
Kubernetes
Trends
Where Kubernetes is Going?

52. Kubernetes Move So Fast...
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53. 53
Thanks!
Any questions?
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