Kubernetes XFS support detector

xfs-detector.yaml

apiVersion: apps/v1
kind: DaemonSet
metadata:
  namespace: kube-system
  name: xfs-detector
  labels:
    app: xfs-detector
spec:
  selector:
    matchLabels:
      app: xfs-detector
  template:
    metadata:
      labels:
        app: xfs-detector
    spec:
      hostPID: true
      volumes:
      - name: tmp
        emptyDir: {}
      initContainers:
      - name: detect
        image: wardsco/nsenter
        imagePullPolicy: IfNotPresent
        command: ["sh", "-eo", "pipefail", "-c"]
        args: ["nsenter -t 1 -m -u -i -n -p -- sh -c 'command -v xfs_mkfile' && touch /tmp/xfs_mkfile || true"]
        securityContext:
          privileged: true
        volumeMounts:
        - name: tmp
          mountPath: /tmp/
      - name: label
        image: wardsco/kubectl:1.11
        command: ["sh", "-eo", "pipefail", "-c"]
        args: ["kubectl label node --overwrite $NODE_NAME fs.type/xfs=$(test -e /tmp/xfs_mkfile && echo 'true' || echo 'false'"]
        env:
        - name: NODE_NAME
          valueFrom:
            fieldRef:
              fieldPath: spec.nodeName
        volumeMounts:
        - name: tmp
          mountPath: /tmp/
          readOnly: true
      containers:
      - name: sleep
        image: wardsco/sleep
        imagePullPolicy: IfNotPresent