Kubernetes for Beginners

# Kubernetes for Beginners Kubernetes (K8s) is the leading container orchestration platform. Let's learn the fundamentals to get you started. ## What is Kubernetes? Kubernetes automates deployment, scaling, and management of containerized applications. ## Core Concepts ### Pods The smallest deployable unit in Kubernetes: ```yaml apiVersion: v1 kind: Pod metadata: name: my-app spec: containers: - name: app image: myapp:1.0 ports: - containerPort: 8080 ``` ### Deployments Manage replica sets and rolling updates: ```yaml apiVersion: apps/v1 kind: Deployment metadata: name: my-app spec: replicas: 3 selector: matchLabels: app: my-app template: metadata: labels: app: my-app spec: containers: - name: app image: myapp:1.0 ``` ### Services Expose your application: ```yaml apiVersion: v1 kind: Service metadata: name: my-app-service spec: selector: app: my-app ports: - port: 80 targetPort: 8080 type: LoadBalancer ``` ## Basic Commands ```bash # Get cluster info kubectl cluster-info # List pods kubectl get pods # Create resource kubectl apply -f deployment.yaml # Scale deployment kubectl scale deployment my-app --replicas=5 # View logs kubectl logs my-pod ``` ## Benefits of Kubernetes 1. Self-healing 2. Auto-scaling 3. Load balancing 4. Rollback capabilities 5. Service discovery Kubernetes has a learning curve, but the benefits for production applications are immense.