Kubernetes Developer Certified Professional™

the Kubernetes Developer Certified Professional certification validates skills related to developing, deploying, and managing applications in a Kubernetes environment. The main skills it assesses include:

1. Fundamental Kubernetes Knowledge:

• Understanding the Kubernetes orchestration system.
• Using core components: Pods, Deployments, Services, ConfigMaps, Secrets, Volumes, etc.
• Configuring clusters for development.

2. Application Development for Kubernetes:

• Building containerized applications using tools like Docker or Podman.
• Deploying applications in a Kubernetes cluster.
• Creating and managing YAML manifests for configuring deployments and services.

3. Configuration and State Management:

• Using ConfigMaps and Secrets to manage configurations and sensitive data.
• Defining and managing StatefulSets for applications requiring persistence.
• Handling scalability and replication of applications.

4. Implementing Advanced Patterns:

• Using Ingress for managing HTTP and HTTPS traffic.
• Implementing deployment strategies such as Rolling Updates, Blue-Green Deployments, and Canary Releases.
• Configuring affinity policies, tolerations, and node constraints.

5. Debugging and Monitoring Applications:

• Using tools and CLI commands for troubleshooting.
• Monitoring logs of containers and deployed applications.
• Setting up Health Probes (liveness and readiness) to ensure application availability.

6. Networking and Connectivity Management:

• Configuring ClusterIP, NodePort, and LoadBalancer services.
• Using network policies to control pod-to-pod communication.

7. Kubernetes Security:

• Managing roles and permissions with RBAC (Role-Based Access Control).
• Securing applications with Network Policies.
• Properly using Secrets to ensure data confidentiality.

8. Integration and Automation:

• Working with CI/CD pipelines for continuous deployment.
• Using integration tools like Helm to manage packages and complex deployments.

This certification validates not only theoretical knowledge but also practical skills to apply these competencies in real-world Kubernetes development and deployment scenarios.