kubectl cordon

• Mark a node as unschedulable
• Cordon makes the node no.spec.unschedulable = true and adds a taint to a node to avoid it being considered by kube-schedule
• It does not evict pods already running in the not. It just prevents new ones from being scheduled there
• cordon (kubectl cordon) is often used as the first step before draining a node (kubectl drain)

kubectl cordon "node-name"

apiVersion: v1
kind: Node
metadata:
  name: ip-192-168-124-41.ec2.internal
spec:
  taints:
    - key: node.kubernetes.io/unschedulable
      effect: NoSchedule
      timeAdded: "2024-12-12T00:40:34Z"
  unschedulable: true