The document provides an introduction to the Kubernetes (k8s) API, including how to access API objects using kubectl and directly through the API server with tools like curl and Postman. It covers basic operations such as retrieving and creating Kubernetes objects and the necessary authorization tokens for API access. The overall focus is on building applications utilizing the Kubernetes API.

1. Cloud Native: Building stuff with the Kubernetes API
K8S API Objects
1

2. Agenda
1. Introduction of K8S API
2. Accessing API objects with kubectl
3. Accessing the API server directly
• cURL
• Postman
4. Summary
2

3. • 5 /
• 3 MES/SFC
• 3 ERP (SAP-MM )/EAI Leader
• 2 End-To-End Business Integration Analyst
• 1 OEM Sales Team Leader
• 4 /
• 6 /
• IT –
• 4.0 / -
erhwenkuo@gmail.com
3

4. K8S API
4

5. • Kubernnetes I K8S
API API
• I
I API

6. - -
• KubernetesI
• K8SI API A K8SI (objects)

7. - -
• hi K aKubernetes etcd A
IKubernetes
• A c b e
f P

8. kubectl
K8S API
8

9. • Kubernetes API I raw
kubectl get
• P API A

11. • Ikubectl PA K8S
NodeList A

13. • A ”master01”

14. K8S

15. • I ikubectl b
j
API P
• I g kubectl
create -f JSON API
h eK8S
”default” l A 3
NGINX pod kc

16. K8S
yaml ,
json
, K8S
nginx
pods!!

17. • kubectl get-raw

19. K8S API
19

20. • I HTTP K8S API
• #1: kubectl proxy
• #2: K8S API server
• P cURL Web A REST

21. #1: kubectl proxy
• i API g HTTP Ie
kubectl proxy
• h K8S API g
PA d
• localhost 8080 c
API

22. #1: kubectl proxy
• Kubectl proxy I HTTP API
cURL AK8S API API

23. #1: kubectl proxy
proxy
8080
K8S API
API

24. #1: kubectl proxy
• A I
API

25. #1: kubectl proxy
• IHTTP API
• JSON Atest-ns Kubernetes

26. #2: K8S API server
• P A kubectl proxy c API
• d K8S API I
• kubectl Kubernetes K8S API
e service account authorization token

27. #2: K8S API server
kubectl K8S ,
kubectl
~/.kube/config
K8S
kubectl K8S ,
kubectl
~/.kube/config
K8S
K8S API URL
APISERVER
K8S API Token
TOKEN (
Base64 )

28. #2: K8S API server
• APISERVER TOKEN AHTTP

29. #2: K8S API server
self-
signed certificate,
--
insecure

30. #2: K8S API server
• Postman K8S API
• https://www.getpostman.com

31. #2: K8S API server
kubectl K8S ,
kubectl
~/.kube/config
K8S
kubectl K8S ,
kubectl
~/.kube/config
K8S
K8S API
URL
K8S API
token (
Base64 )
1

32. #2: K8S API server
• Base64 Token
• https://codebeautify.org/base64-decode
K8S API
token ( Base64 )
Token
Token
( Postman
2
3
4

33. #2: K8S API server
Postman
SSL
5

34. #2: K8S API server
6
Postman SSL

35. #2: K8S API server
1
K8S API
URL
3
“Authorization”
“Bearer Token”
2
Base64
Token
4
5

36. #2: K8S API server

37. 37

38. • Kubernetes API
• Kubernetes API
API
• S
Kubernetes API a

39. - A: E 0 5 A E 1/ 4 K K.I B A: 1/
B5 6 E
• E 6B B: 4 A: 5 A E 5 A:
E 5 A E 4 66) 4 (
34 0 5 A E 1/ B 4 2 A
• E A E 46 B 4 A: 5 A E 4 E A

40. 40