• Example of execing into a pod and running a command: 
    kubectl exec webapp -- cat /log/app.log
  • Example steps to configure a volume: 
    kubectl get po webapp -o yaml > webapp.yaml

    OR

    kubectl run --dry-run=client -o yaml
  • Then kubectl delete po webapp
  • Then: ``` apiVersion: v1 kind: Pod metadata: name: webapp spec: containers:
    • name: event-simulator image: kodekloud/event-simulator env:
      • name: LOG_HANDLERS value: file volumeMounts:
      • mountPath: /log name: log-volume

    volumes:

    • name: log-volume hostPath: # directory location on host path: /var/log/webapp # this field is optional type: Directory ```
  • Then create it with: 
    kubectl create -f <file-name>.yaml
  • Another example of Persistent Volume: ``` apiVersion: v1 kind: PersistentVolume metadata: name: pv-log spec: persistentVolumeReclaimPolicy: Retain accessModes:
    • ReadWriteMany capacity: storage: 100Mi hostPath: path: /pv/log ```
  • Example Persistent Volume Claim: ``` kind: PersistentVolumeClaim apiVersion: v1 metadata: name: claim-log-1 spec: accessModes:
    • ReadWriteOnce resources: requests: storage: 50Mi ```
  • Updated PersistentVolumeClaim with better Access Modes: ``` kind: PersistentVolumeClaim apiVersion: v1 metadata: name: claim-log-1 spec: accessModes:
    • ReadWriteMany resources: requests: storage: 50Mi ```
  • Example Pod using a PersistentVolumeClaim: ``` apiVersion: v1 kind: Pod metadata: name: webapp spec: containers:
    • name: event-simulator image: kodekloud/event-simulator env:
      • name: LOG_HANDLERS value: file volumeMounts:
      • mountPath: /log name: log-volume

    volumes:

    • name: log-volume persistentVolumeClaim: claimName: claim-log-1 ```
  • A PVC is stuck in a terminating state if it is being used by a pod.
  • How to forcefully delete a pod: 
    kubectl delete pod webapp --force

Updated: