목차
- Build APP - Container image
- Deploy APP
- Check APP
- Expose APP
- Scale APP
- Update APP
Scale APP
이 문서는 Pod 을 Scale-out 하는 방법에 대해 포함되어 있습니다.
Scale 개요
- Before
- After
Command 를 이용하여 Scale-out
기존에 1개의 Pod 으로 실행중이던 APP 을 5개의 Pod 으로 Scale-out 하도록 하겠습니다.
$ kubectl scale deployment --replicas=5 flask-example-app
- Scale 확인
$ kubectl get deployment NAME READY UP-TO-DATE AVAILABLE AGE flask-example-app 5/5 5 5 126m - Pod 확인
$ kubectl get pod NAME READY STATUS RESTARTS AGE flask-example-app-959c5f88d-k95wk 1/1 Running 0 127m flask-example-app-959c5f88d-rb4rv 1/1 Running 0 2m21s flask-example-app-959c5f88d-9kl5k 1/1 Running 0 2m21s flask-example-app-959c5f88d-b62j5 1/1 Running 0 2m21s flask-example-app-959c5f88d-fbjtl 1/1 Running 0 2m21s - 서비스 확인(Round-Robin)
$ while true; do curl 192.168.200.110:32296; done $ while true; do curl <TEST-SERVER-IP>:<NODEPORT>; done << TEST 환경에 맞게 수정합니다.아래와 같이 Scale-out 되어 서비스 중인 것을 볼 수 있습니다.
$ while true; do curl 192.168.200.110:32296; done Container LAB | POD Working : flask-example-app-959c5f88d-9kl5k | v=1 Container LAB | POD Working : flask-example-app-959c5f88d-k95wk | v=1 Container LAB | POD Working : flask-example-app-959c5f88d-b62j5 | v=1 Container LAB | POD Working : flask-example-app-959c5f88d-9kl5k | v=1 Container LAB | POD Working : flask-example-app-959c5f88d-b62j5 | v=1 Container LAB | POD Working : flask-example-app-959c5f88d-rb4rv | v=1 Container LAB | POD Working : flask-example-app-959c5f88d-9kl5k | v=1 Container LAB | POD Working : flask-example-app-959c5f88d-b62j5 | v=1 Container LAB | POD Working : flask-example-app-959c5f88d-9kl5k | v=1 Container LAB | POD Working : flask-example-app-959c5f88d-b62j5 | v=1 Container LAB | POD Working : flask-example-app-959c5f88d-k95wk | v=1 Container LAB | POD Working : flask-example-app-959c5f88d-rb4rv | v=1 Container LAB | POD Working : flask-example-app-959c5f88d-k95wk | v=1 Container LAB | POD Working : flask-example-app-959c5f88d-rb4rv | v=1 Container LAB | POD Working : flask-example-app-959c5f88d-9kl5k | v=1 ...
edit 옵션을 이용하여 수정하는 방법
$ kubectl edit deployment flask-example-app
...
spec:
progressDeadlineSeconds: 600
replicas: 5 << replicas 수정
revisionHistoryLimit: 10
selector:
matchLabels:
app: flask-example-app
...