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DaemonSet

  • Runs a copy of the pod specified in the yaml file on all or specified numbers of worker nodes in the cluster
  • Useful for applications such as:
    1. Cluster Storage Daemon
    2. Log Aggregation
    3. Node Monitoring

DaemonSet Manifest File​

daemonset.yaml
apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: fluentd-minimal
spec:
  selector:
    matchLabels:
      app: fluentd
  template:
    metadata:
      labels:
        app: fluentd
    spec:
      containers:
        - name: fluentd
          image: fluentd:v1.16-1

After make the manifest file, we apply the manifest to create the DaemonSet

kubectl apply -f daemonset.yaml

Then check the daemonset that have been created

# Get daemonset
kubectl get ds

# Get daemonset pods that spread accross worker node
kubectl get pods -o wide