Optimize GKE local SSD disk

startup-script-ds.yaml

apiVersion: extensions/v1beta1
kind: DaemonSet
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: gcr.io/google-containers/startup-script:v1
          securityContext:
            privileged: true
          env:
          - name: STARTUP_SCRIPT
            value: |
              #!/usr/bin/env bash
              set -euo pipefail
              apt-get update
              apt-get install -y software-properties-common
              apt-add-repository universe
              apt-get update
              declare -a PKG_LIST=(python-google-compute-engine \
              python3-google-compute-engine \
              google-compute-engine-oslogin \
              gce-compute-image-packages)
              for pkg in ${PKG_LIST[@]}; do
                  apt-get install -y $pkg || echo "Not available: $pkg"
              done
              mount | grep -v nobarrier | awk '/ssd/{print $1}' | xargs -i mount {} -o remount,nobarrier
          volumeMounts:
          - mountPath: /mnt/disks
            name: local-ssd
            mountPropagation: Bidirectional
      volumes:
      - name: local-ssd
        hostPath:
          path: /mnt/disks