daemonset.yaml

kind: DaemonSet
apiVersion: extensions/v1beta1
metadata:
  name: startup-script
  namespace: kube-system
  labels:
    app: startup-script
spec:
  template:
    metadata:
      labels:
        app: startup-script
    spec:
      hostPID: true
      containers:
      - name: startup-script
        image: k8s-startup-script
        securityContext:
          privileged: true
        env:
        - name: STARTUP_SCRIPT
          value: |
            #! /bin/bash
            set -o errexit
            set -o pipefail
            set -o nounset

            apt-get update || true
            apt-get install -y xfsprogs