apiVersion: apps/v1
kind: DaemonSet
metadata:
  namespace: kube-system
  name: sysctl
spec:
  selector:
    matchLabels:
      app: sysctl
  template:
    metadata:
      labels:
        app: sysctl
    spec:
      volumes:
      - name: sys
        hostPath:
          path: /sys
      initContainers:
      - name: disable-thp
        image: busybox
        command: ["sh", "-c"]
        args:
        - |-
          set -e
          set -o pipefail
          echo never > /rootfs/sys/kernel/mm/transparent_hugepage/enabled
          echo never > /rootfs/sys/kernel/mm/transparent_hugepage/defrag
          grep -q -F [never] /sys/kernel/mm/transparent_hugepage/enabled
          grep -q -F [never] /sys/kernel/mm/transparent_hugepage/defrag
        volumeMounts:
        - name: sys
          mountPath: /rootfs/sys
      - name: label-node
        image: wardsco/kubectl:1.11
        command: ["kubectl"]
        args: ["label", "node", "--overwrite", "$(NODE_NAME)", "sysctl/mm.transparent_hugepage.enabled=never", "sysctl/mm.transparent_hugepage.defrag=never"]
        env:
        - name: NODE_NAME
          valueFrom:
            fieldRef:
              fieldPath: spec.nodeName
      containers:
      - name: sleep
        image: wardsco/sleep
        imagePullPolicy: IfNotPresent