apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: example-daemonset
  namespace: default
  labels:
    app: example-daemonset
spec:
  selector:
    matchLabels:
      name: example-daemonset
  template:
    metadata:
      labels:
        name: example-daemonset
    spec:
      tolerations:
      # this toleration is to have the daemonset runnable on master nodes
      # remove it if your masters can't run pods
      - key: node-role.kubernetes.io/master
        effect: NoSchedule
      containers:
      - name: example-daemonset
        image: alpine:latest
        env:
        - name: NODE_NAME
          valueFrom:
            fieldRef:
              fieldPath: spec.nodeName
        command:
        - "bin/sh"
        - "-c"
        - "echo 'Hello! I am running on '$NODE_NAME; while true; do sleep 300s ; done;"
        resources:
          limits:
            memory: 200Mi
          requests:
            cpu: 100m
            memory: 200Mi
      terminationGracePeriodSeconds: 30
