[CKA] - Pod Log 추출

[선수 지식]

kubectl logs POD

kubectl logs POD -c CONTAINER

 

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[선수 작업]

kubectl config set-context hk8s --user=kubernetes-admin --cluster=kubernetes

mkdir -p /var/CKA2023

kubectl apply -f - <<EOF
kind: Pod
apiVersion: v1
metadata:
  name: custom-app
spec:
  containers:
  - name: custom-container
    image: busybox
    command:
    - '/bin/sh'
    - '-c'
    - >
      while true; 
      do 
        [ ! -f /filenotfound.txt ] && echo "[ ERROR ] file not found";
        sleep 10; 
      done
EOF

 

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[문제]

작업 클러스터: hk8s

Monitor the logs of pod custom-app and: Extrat log lines corresponding to error file not found. Write them to /var/CKA2023/podlog.

 

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[풀이]

kubectl config use-context hk8s

* hk8s 클러스터 사용

 

kubectl get pods custom-app

* Pod 확인

 

kubectl logs custom-app | grep 'file not found'

* file not found가 포함된 log 확인

 

kubectl logs custom-app | grep 'file not found' > /var/CKA2023/podlog

* 해당 로그를 파일에 기록

 

기록된 로그 확인

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[참고]

명령줄 도구 (kubectl)