k8s-chroot-host-from-pod.sh

#!/bin/sh -xe

for NAME in $(kubectl get nodes -o name | awk -F \/ '{print $2}'); do
  cat << EOF | kubectl apply -f -
    apiVersion: v1
    kind: Pod
    metadata:
     name: kube-support-$NAME
     namespace: kube-system
    spec:
      terminationGracePeriodSeconds: 1
      containers:
        - name: debian
          image: debian:buster
          command: ["/bin/sleep"]
          args: ["infinity"]
          volumeMounts:
            - name: host
              mountPath: /host
          securityContext:
            privileged: true
      volumes:
        - name: host
          hostPath:
            path: /
            type: Directory
      nodeSelector:
        kubernetes.io/hostname: $NAME
      tolerations:
        - operator: "Exists"
  EOF
done