Kubernetes Scheduling

Daemon sets:

Daemon sets ensures that 1 copy of pods is always running on a node. when the Node is removed the POD is automatically deleted.

Sample Use case includes — Monitoring agent. networking solution like weave-net.

Creating a daemon set similar to creating a ReplicaSet.

#Sample definition YAML file
apiVersion: apps/v1
kind: DaemonSet
metadata:
   name: patrol-agent-daemonset
spec:
  selector:
    matchLabels:
       app: patrol-monitoring
  template:
    metadata:
      labels:
         app: patrol-monitoring
    spec:
      containers:
        - name: patrol-agent
          image: patrol-image
# To View Daemonset created.
$kubectl get daemonsets
#Details about Daemonset
$kubectl describe daemonsets patrol-agent-daemonset