kubelet 30s kill pod

deploy.yaml

apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: &name kubelet-killer-30sec
  labels:
    app: *name
spec:
  selector:
    matchLabels:
      app: *name
  template:
    metadata:
      labels:
        app: *name
    spec:
      hostNetwork: true
      hostPID: true
      containers:
      - image: docker.io/alexeldeib/nsenter:static # requires an image with bash, curl, sleep, and nsenter (vanilla ubuntu works)
        imagePullPolicy: Always
        name: *name
        command: ["/entrypoint.sh"]
        args: ["killit"] # if you don't use my image or build one from Dockerfile, set this to "downloadandinstall"
        resources:
          requests:
            {}
          limits:
            {}
        securityContext:
          privileged: true
        volumeMounts:
        - name: actions
          mountPath: "/opt/actions"
        - name: hostmount
          mountPath: "/mnt/actions"
        - name: usr
          mountPath: /mnt/usr
      volumes:
      - name: usr
        hostPath:
          path: /usr
          type: DirectoryOrCreate
      - name: hostmount
        hostPath:
          path: /opt/actions
          type: DirectoryOrCreate
      - name: actions
        configMap:
          name: nsenter-actions
---
apiVersion: v1
kind: ConfigMap
metadata:
  name: nsenter-actions
  labels:
    app: nsenter
data:
  killit: |
    #!/usr/bin/env bash
    set -uo pipefail

    # This script should be executed on VM host in the directly as the deb packages
    # the host will be mounted at /host, the debs will be copied to /mnt
    # then the container will nsenter and install everything against the host.

    set -x

    echo "starting kubelet killer"

    # !!DANGER!! but but nice because it restarts kubelet
    trap 'systemctl restart kubelet' EXIT SIGINT SIGTERM

    systemctl stop kubelet
    # do stuff
    sleep 30
    # restart it
    systemctl restart kubelet
    echo "finished elet killer"
---