DaemonSet (ds)

• DaemonSet assures that one (and only one) replica of the pod runs on each node

• DaemonSets are not scheduled by kube-scheduler, because it must be in all of the nodes

• Use cases

• Logs collection: e.g., fluentd
• Node monitoring: e.g., cloudwatchagent
• Application Trace Collection: e.g., aws x-ray
• Network solutions: e.g., kube-proxy

apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: myapp-ds
spec:
  selector:
    matchLabels:
      app: myapp
  template:
    metadata:
      name: myapp-po
      labels:
        app: myapp
    spec:
      containers:
        - name: nginx-container
          image: nginx