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URL: TechOps Examples Newsletter
Kubernetes (K8s) is the cornerstone of modern cloud-native infrastructure, enabling scalable, resilient, and automated container orchestration. Below are key concepts simplified for quick understanding.
You Should Know:
1. Pods
The smallest deployable unit in Kubernetes, a Pod encapsulates one or more containers.
List all Pods kubectl get pods Describe a Pod kubectl describe pod <pod-name> Delete a Pod kubectl delete pod <pod-name>
2. Deployments
Manages stateless Pod replicas, ensuring high availability.
Create a Deployment kubectl create deployment nginx --image=nginx Scale a Deployment kubectl scale deployment nginx --replicas=3 Rollout updates kubectl set image deployment/nginx nginx=nginx:1.25
3. Services
Exposes Pods to internal or external traffic.
Create a ClusterIP Service kubectl expose deployment nginx --port=80 Create a LoadBalancer Service kubectl expose deployment nginx --port=80 --type=LoadBalancer
4. PersistentVolumes (PV) & PersistentVolumeClaims (PVC)
Manages storage in Kubernetes.
List PVs and PVCs kubectl get pv kubectl get pvc Create a PVC kubectl apply -f pvc.yaml
5. ConfigMaps & Secrets
Stores configuration and sensitive data.
Create a ConfigMap kubectl create configmap app-config --from-literal=key=value Create a Secret kubectl create secret generic db-secret --from-literal=password=1234
6. StatefulSets
Manages stateful applications (e.g., databases).
Deploy a StatefulSet kubectl apply -f statefulset.yaml
7. Horizontal Pod Autoscaler (HPA)
Automatically scales Pods based on CPU/memory.
Enable HPA kubectl autoscale deployment nginx --cpu-percent=50 --min=1 --max=5
8. Helm
Package manager for Kubernetes.
Install Helm curl https://raw.githubusercontent.com/helm/helm/main/scripts/get-helm-3 | bash Install a Helm Chart helm install my-release bitnami/nginx
9. Kubectl Debugging
Essential troubleshooting commands.
View Pod logs kubectl logs <pod-name> Execute into a Pod kubectl exec -it <pod-name> -- /bin/bash Check Kubernetes events kubectl get events
What Undercode Say:
Kubernetes is not just a tool—it’s an ecosystem. Mastering these fundamentals unlocks cloud-native automation, scalability, and resilience. Future advancements will integrate AI-driven autoscaling, enhanced security policies, and GitOps-driven deployments.
Prediction:
By 2026, Kubernetes will dominate 90% of enterprise container orchestration, with tighter integration in serverless and edge computing.
Expected Output:
A fully functional Kubernetes cluster with automated scaling, secure secrets management, and persistent storage.
kubectl get all
References:
Reported By: Govardhana Miriyala – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
