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Kubernetes has become the de facto standard for container orchestration, and mastering its administration is crucial for DevOps and cloud professionals. Below are key concepts and commands every Certified Kubernetes Administrator (CKA) should know.
You Should Know:
1. Kubernetes Cluster Basics
- Check Cluster Status:
kubectl cluster-info
- Get Nodes:
kubectl get nodes
- Describe a Node:
kubectl describe node <node-name>
2. Working with Pods and Deployments
- List All Pods:
kubectl get pods --all-namespaces
- Create a Deployment:
kubectl create deployment nginx --image=nginx
- Scale a Deployment:
kubectl scale deployment nginx --replicas=3
3. Storage and Persistent Volumes
- List Persistent Volumes (PV):
kubectl get pv
- Create a PersistentVolumeClaim (PVC):
apiVersion: v1 kind: PersistentVolumeClaim metadata: name: mypvc spec: accessModes: </li> <li>ReadWriteOnce resources: requests: storage: 1Gi
Apply with:
kubectl apply -f pvc.yaml
4. Networking and Services
- Expose a Deployment as a Service:
kubectl expose deployment nginx --port=80 --type=NodePort
- Check Services:
kubectl get svc
5. Troubleshooting Commands
- View Pod Logs:
kubectl logs <pod-name>
- Execute a Command Inside a Pod:
kubectl exec -it <pod-name> -- /bin/sh
- Check Events in a Namespace:
kubectl get events --namespace=<namespace>
What Undercode Say:
Mastering Kubernetes administration requires hands-on practice with these commands. Automation, scripting, and deep troubleshooting skills are essential for managing large-scale clusters efficiently.
Expected Output:
$ kubectl get nodes NAME STATUS ROLES AGE VERSION node-1 Ready master 10d v1.22.3 node-2 Ready worker 10d v1.22.3
Prediction:
As Kubernetes adoption grows, demand for CKAs will rise, with emphasis on multi-cluster management, security (RBAC, PodSecurityPolicy), and GitOps workflows.
Relevant URLs:
IT/Security Reporter URL:
Reported By: Https: – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
