my-docs/Containerization & Orchestration/Kubernetes/node-manage.md

🌐 Node Management with Kubernetes

Efficient management of Kubernetes nodes ensures cluster stability and workload flexibility. Below are key commands for listing and maintaining nodes.

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📋 Listing Nodes

🔹 Show All Nodes

kubectl get nodes

🔹 Show Nodes with Labels

kubectl get nodes --show-labels

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🔧 Node Maintenance (Cordon / Drain)

🚫 Cordon a Node

Prevent new pods from being scheduled on the node.

kubectl cordon <node-name>

✅ Uncordon a Node

Mark the node as schedulable again.

kubectl uncordon <node-name>

🧹 Drain a Node

Evict all pods from the node (excluding those managed by DaemonSets).

• Forcefully drain the node:

  kubectl drain <node-name> --ignore-daemonsets --force
  

• Drain and delete local data:

  kubectl drain <node-name> --ignore-daemonsets --delete-local-data
  

🔄 Undo Drain (Uncordon)

kubectl uncordon <node-name>

⚠️ Warning: Draining a node will evict running pods. Ensure that this is planned to avoid service disruption.