From 0 To Production-Grade With Kubernetes Native Development

This session will give you an overview of cloud native fundamentals from a Java developer’s perspective. You will learn step-by-step how to get your application to production on Kubernetes without sacrificing your developer experience.

Kevin and Thomas will cover:
- Building and deploying containers easily, featuring Buildpacks, Podman, and Knative.
- Optimizing your application’s performance in cloud native and serverless environments.
- Coding and testing cloud native Java applications with Podman Desktop and Microcks.
- Enabling observability for your cloud native applications using OpenTelemetry to pinpoint errors and performance issues in production.
- Integrating with other services using Kubernetes Service Bindings.

This session will help you develop better cloud-native Java applications, including a comprehensive understanding of the development and operational perspectives in a Kubernetes environment.

Transcript

1. Kevin Dubois & Thomas Vitale KubeCon+CloudNativeCon Europe April 2nd, 2025 From 0 to Production-Grade with Kubernetes Native Development @kevindubois.com @thomasvitale.com
2. Kevin Dubois ˒ Sr. Principal Developer Advocate at Red Hat ˒ Java Champion ˒ 20+ years of software development experience ˒ Based in Belgium 🇧🇪 (prev. USA, Italy) ˒ 🗣 Speak English, Dutch, French, Italian youtube.com/@thekevindubois linkedin.com/in/kevindubois github.com/kdubois @kevindubois.com
3. Thomas Vitale Systematic @kevindubois.com @thomasvitale.com @thomasvitale.com
4. Working with Containers @kevindubois.com @thomasvitale.com
5. Podman Desktop OSS Container Runtime @kevindubois.com @thomasvitale.com podman-desktop.io
6. Cloud Native Buildpacks From source code to container image @kevindubois.com @thomasvitale.com
7. Eliminate sources of non-determinism Reproducible builds with Cloud Native Buildpacks @kevindubois.com @thomasvitale.com
8. Kubernetes Deployments @kevindubois.com @thomasvitale.com
9. apiVersion: v1 kind: Service metadata: name: kubenative spec: ports: - name: http port: 80 protocol: TCP targetPort: 8080 selector: app.kubernetes.io/name: kubenative apiVersion: apps/v1 kind: Deployment metadata: name: kubenative spec: replicas: 1 selector: matchLabels: app.kubernetes.io/name: kubenative template: spec: containers: - image: quay.io/kevin/demo name: kubenative ports: - containerPort: 8080 name: http protocol: TCP @kevindubois.com @thomasvitale.com
10. @kevinduboi s
11. Ready?? Container Running Sends traffic App not ready
12. After 2.6s (Kafka, DB, Caching) App is ready to receive traffic Container Running Sends traffic App not ready Ready??
13. Downtime of 2.6s Ready??
14. readinessProbe: failureThreshold: 3 httpGet: path: /q/health/ready port: 8080 scheme: HTTP initialDelaySeconds: 5 livenessProbe: failureThreshold: 3 httpGet: path: /q/health/live port: 8080 scheme: HTTP initialDelaySeconds: 5 Readiness, Liveness, Startup Probes
15. containers: - name: nginx-container image: nginx:latest ports: - containerPort: 80 volumes: - name: secret-volume secret: secretName: your-secret-name Kubernetes Secrets & ConfigMaps kind: ConfigMap apiVersion: v1 metadata: name: properties immutable: false data: 'kafka-servers': kafka-bootstrap:9092 kind: Secret apiVersion: v1 metadata: name: postgresql data: database-name: xyz database-password: xyz database-user: xyz type: Opaque
16. resources: requests: memory: "300Mi" cpu: "250m" limits: memory: "400Mi" cpu: "1000m" Resource Requests & Limits
18. Supersonic. Subatomic. Java @kevindubois.com @thomasvitale.com mvn package
19. Serverless Kubernetes @kevindubois.com @thomasvitale.com
20. @kevindubois.com @thomasvitale.com Knative
21. Development Services @kevindubois.com @thomasvitale.com
22. @kevindubois.com @thomasvitale.com Kubernetes for Local Development?
23. Development Services Code, Test, Run, Debug @kevindubois.com @thomasvitale.com
24. Testcontainers Services for development and testing @kevindubois.com @thomasvitale.com
25. Observability @kevindubois.com @thomasvitale.com
26. OpenTelemetry @kevindubois.com @thomasvitale.com Unified observability opentelemetry.io
27. API Testing @kevindubois.com @thomasvitale.com
28. @kevindubois.com @thomasvitale.com The open source, cloud native tool for API Mocking and Testing
30. Service Binding @kevindubois.com @thomasvitale.com
31. Kubernetes Service Binding Bind Services to Kubernetes Workloads @kevindubois.com @thomasvitale.com
32. Conclusion @kevindubois.com @thomasvitale.com
33. Kubernetes Native Development From 0 to Production-Grade @kevindubois.com @thomasvitale.com
34. Thomas Vitale Kevin Dubois @thomasvitale.com thomasvitale.com @kevindubois.com kevindubois.com source code