[K8S] 컨테이너에 command 실행 적용하기 (while문, tail 명령어, sleep 명령어 등)

spec.containers 아래에 command를 추가한다.

apiVersion: v1

kind: Pod

metadata:

  creationTimestamp: null

  labels:

    run: multi-container

  name: multi-container

spec:

  containers:

  - image: busybox:1.31.1

    name: c1

    command: ["sh", "-c", "while true; do date >> /vol/date.log; sleep 1; done"]

    volumeMounts:

    - name: vol

      mountPath: /vol

  - image: busybox:1.31.1

    name: c2

    command: ["sh", "-c", "tail -f /vol/date.log"] 

    volumeMounts:                          

    - name: vol 

      mountPath: /vol 

  dnsPolicy: ClusterFirst

  restartPolicy: Always

  volumes:

    - name: vol

      emptyDir: {}

status: {}

apiVersion: v1

kind: Pod

metadata:

  labels:

    run: sleep-pod

  name: sleep-pod

  namespace: default

spec:

  containers:

  - image: nginx:1.21.3-alpine

    name: nginx

  - image: busybox:1.31

    name: bb

    command: ["sh", "-c", "sleep 1d"] 

    resources: {}

  dnsPolicy: ClusterFirst

  restartPolicy: Always

status: {}