[Kubernetes]Pod: 작업 중인 Pod 수정

Pod의 작업을 유지한 채 수정

예시 (Trouble Shooting)

1. 오류 식별

    master@k8s-master:~/kubernetes$ kubectl get pods
    NAME    READY   STATUS             RESTARTS   AGE
    redis   0/1     ImagePullBackOff   0          19m
   

2. 오류 분석
   • 하단의 이벤트 로그를 통해 Image Pulling 실패 식별

    master@k8s-master:~/kubernetes$ kubectl describe pods redis
    Name:             redis
   
    ...
   
    Events:
    Type     Reason     Age                 From               Message
    ----     ------     ----                ----               -------
    Normal   Scheduled  21m                 default-scheduler  Successfully assigned default/redis to k8s-node1
    Normal   Pulling    20m (x4 over 21m)   kubelet            Pulling image "redis123"
    Warning  Failed     20m (x4 over 21m)   kubelet            Failed to pull image "redis123": rpc error: code = Unknown desc = Error response from daemon: pull access denied for redis123, repository does not exist or may require 'docker login': denied: requested access to the resource is denied
    Warning  Failed     20m (x4 over 21m)   kubelet            Error: ErrImagePull
    Warning  Failed     19m (x6 over 21m)   kubelet            Error: ImagePullBackOff
    Normal   BackOff    99s (x85 over 21m)  kubelet            Back-off pulling image "redis123"
   

3. 해당 Pods 수정
   • edit 명령어를 통해 수정 요청
   • vi 편집기에서 오류에 해당하는 내용을 수정

    kubectl edit pods redis