Bash script to reproduce https://github.com/google/cadvisor/issues/2947

reproduce_cadvisor_2947.sh

# NS
kubectl create ns cadvisor-issue-test

# PV
echo "
apiVersion: v1
kind: PersistentVolume
metadata:
  name: pvc-cadvisor-issue-test
spec:
  accessModes:
  - ReadWriteMany
  capacity:
    storage: 100Gi
  mountOptions:
  - hard
  nfs:
    path: /nfsexport/blub123
    server: nfs.example.com
  persistentVolumeReclaimPolicy: Retain
  storageClassName: nfs-netapp
  volumeMode: Filesystem
" | kubectl apply -f-

# PVC
echo "
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: cadvisor-issue-test
  namespace: cadvisor-issue-test
spec:
  accessModes:
  - ReadWriteMany
  resources:
    requests:
      storage: 100Gi
  storageClassName: nfs-netapp
  volumeMode: Filesystem
  volumeName: pvc-cadvisor-issue-test
" | kubectl apply -f-

# CM
echo '
apiVersion: v1
kind: ConfigMap
metadata:
  name: script
  namespace: cadvisor-issue-test
data:
  entrypoint.sh: |-
    #!/bin/bash
    set -x
    for i in {1..60}
    do
      WAIT_SECONDS=$(shuf -i 0-60 -n 1)
      sleep $WAIT_SECONDS
      FILENAME=$(shuf -i 0-10000 -n 1)
      echo "test123" > /opt/$FILENAME.txt
      sleep 1
      cat /opt/$FILENAME.txt
      rm /opt/$FILENAME.txt
    done
' | kubectl apply -f-

# Create pods
for i in {1..250}
do
  echo "
  apiVersion: v1
  kind: Pod
  metadata:
    name: tshoot-pod-$i
    namespace: cadvisor-issue-test
    labels:
      app: tshoot
  spec:
    restartPolicy: Never
    volumes:
    - name: cadvisor-issue-test
      persistentVolumeClaim:
        claimName: cadvisor-issue-test
    - name: script
      configMap:
        defaultMode: 0700
        name: script
    containers:
    - name: tshoot
      image: ghcr.io/philipschmid/tshoot:0.0.4
      command:
      - /bin/entrypoint.sh
      volumeMounts:
      - mountPath: /opt
        name: cadvisor-issue-test
      - name: script
        mountPath: /bin/entrypoint.sh
        readOnly: true
        subPath: entrypoint.sh
  " | kubectl apply -f-
done