osdisk-optimizer.yaml

apiVersion: apps/v1
kind: DaemonSet
metadata:
  labels:
    component: osdisk-optimizer
  name: osdisk-optimizer
  namespace: kube-system
spec:
  selector:
    matchLabels:
      component: osdisk-optimizer
      tier: node
  template:
    metadata:
      labels:
        component: osdisk-optimizer
        tier: node
    spec:
      containers:
      - command:
        - nsenter
        - --target
        - "1"
        - --mount
        - --uts
        - --ipc
        - --net
        - --pid
        - --
        - sh
        - -c
        - |
          df -h

          echo Default /sys/block/sda/device/queue_depth $(cat /sys/block/sda/device/queue_depth)

          echo Default /sys/block/sda/queue/nr_requests $(cat /sys/block/sda/queue/nr_requests)

          echo Updating queue_depth and nr_requests
          echo 128 > /sys/block/sda/device/queue_depth
          echo 128 > /sys/block/sda/queue/nr_requests

          echo Current /sys/block/sda/device/queue_depth $(cat /sys/block/sda/device/queue_depth)

          echo Current /sys/block/sda/queue/nr_requests $(cat /sys/block/sda/queue/nr_requests)

          while true; do sleep 100000; done
        image: alpine
        imagePullPolicy: IfNotPresent
        name: osdisk-optimizer
        resources:
          requests:
            cpu: 10m
        securityContext:
          privileged: true
      dnsPolicy: ClusterFirst
      hostPID: true
      hostNetwork: true
      tolerations:
      - effect: NoSchedule
        operator: Exists
      - effect: NoExecute
        operator: Exists
      - key: CriticalAddonsOnly
        operator: Exists
      restartPolicy: Always