[CKA]따배씨 - 07. Rolling Update & Roll Back

문제

작업 클러스터: k8s Create a Deployment as follows: Task: name: nginx-app Using container nginx with version 1.11.10-alpine The Deployment should contain 3 replicas Next, deploy the application with new version 1.11.13-alpine, by performing a rolling update Finally, rollback that update to the previous version 1.11.10-alpine

문제 풀이

#1. 클러스터 context 변경
kubectl config use-context k8s

# 2. Deployment 생성
kubectl create deployment nginx-app --image=nginx:1.11.10-alpine --replicas=3 --dry-run -o yaml
kubectl create deployment nginx-app --image=nginx:1.11.10-alpine --replicas=3

# 3. Deployment 생성 확인
kubectl get deployments.apps nginx-app
kubectl get pods | grep nginx-app

# 4-1. rolling update
## Flag --record has been deprecated, --record will be removed in the future
kubectl set image deployments nginx-app nginx=nginx:1.11.13-alpine --r
ecord

# 4-2.rolling update 히스토리 확인
kubectl rollout history deployment nginx-app

# 5-1. rollback
kubectl rollout undo deployment nginx-app

# 5-2. rollback 히스토리 확인
kubectl rollout history deployment nginx-app