DaemonSet

DaemonSet creation.

yaml file for DaemonSet is same as ReplicaSet except replicas

master $ cat ds.yaml
apiVersion: apps/v1
kind: DaemonSet
metadata:
 name: elasticsearch
 namespace: kube-system
spec:
 selector:
  matchLabels:
   app: logger
 template:
  metadata:
   labels:
    app: logger
  spec:
   containers:
   - name: el-pod
     image: k8s.gcr.io/fluentd-elasticsearch:1.20
master $

kubectl create -f ds.yaml



with nginx image 

apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: nginx-daemon
  labels:
    k8s-app: nginx-daemon
spec:
  selector:
    matchLabels:
      name: nginx-daemon
  template:
    metadata:
      labels:
        name: nginx-daemon
    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: nginx-daemonset
        image: nginx
        resources:
          limits:
            memory: 200Mi
          requests:
            cpu: 100m
            memory: 200Mi
      terminationGracePeriodSeconds: 30