---
apiVersion: extensions/v1beta1
kind: DaemonSet
metadata:
  name: ssdchecker
spec:
  selector:
    matchExpressions:
      - key: checker
        operator: In
        values:
          - ssd
  template:
    metadata:
      labels:
        checker: ssd
    spec:
      nodeSelector: 
        disk: ssd
      containers:
      - name: ssdchecker
        image: ssdchecker
...

Add an example of daemonset yaml file
Add an example of daemonset yaml file
