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Hands-On Java with Kubernetes

Piotr Mińkowski

Build. Deploy. Scale.

Take your Java skills to the cloud-native level with Hands-On Java with Kubernetes. From your first Spring Boot or Quarkus app to production-ready deployments with CI/CD, observability, and service mesh—you’ll learn by doing, not just reading. Ideal for developers who want to master Kubernetes without getting bogged down in YAML configuration.

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About

About

About the Book

This book is a practical guide for developers eager to build, deploy, and scale Java applications in the cloud-native age. Instead of overwhelming you with theory, it takes a hands-on approach, showing you how to run your first Spring Boot and Quarkus apps on Kubernetes without writing a single line of YAML or Dockerfile.

From setting up a local Kubernetes environment to mastering best practices, security, scalability, and service mesh, you’ll learn how to leverage frameworks and tools like Quarkus, Spring Boot, Prometheus, Istio, Tekton, and Argo CD. Each chapter includes runnable examples in a GitHub repository, making it easy to follow along.

Whether you’re a Java developer new to Kubernetes or an experienced engineer looking to modernize applications, this book offers step-by-step guidance to help you navigate the cloud-native ecosystem and confidently deliver production-ready applications.

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JavaKubernetesSoftware Engineering

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Author

About the Author

Piotr Mińkowski

Piotr Mińkowski is an experienced software engineer and systems architect with expertise in Java technologies, microservice architecture, and container platforms. He actively manages a popular technical blog where he shares practical knowledge about modern software development, cloud computing, and DevOps.

Piotr has extensive professional experience in designing, migrating, and transforming monolithic applications into microservice and container architectures, especially using Kubernetes. He has worked on numerous commercial projects, where he was responsible for modernizing systems, improving application scalability, and implementing cloud-native solutions.

Contents

Table of Contents

Introduction & Motivation

Chapter 1: Run First Applications on Kubernetes

  1. Install Command-Line Tools for Development
  2. Generate an App using Quarkus CLI
  3. Deploy Quarkus Application on Kubernetes
  4. Expose an App Outside a Cluster
  5. Generate an App using Spring Boot CLI
  6. Generate Kubernetes Manifests with the Dekorate Library
  7. Spring Boot App Image with Cloud Native Buildpacks
  8. Conclusion

Chapter 2: Local Environment

  1. Install Docker Desktop
  2. Install Podman Desktop
  3. Run Kubernetes in Docker (KinD)
  4. Install OpenShift Local
  5. Install Helm
  6. Conclusion

Chapter 3: Best Practices for Java Applications with Kubernetes

  1. Application Logs
  2. Liveness and Readiness Health Checks
  3. Externalized Configuration
  4. Collecting Metrics with Prometheus
  5. Traffic Management and Tracing with Service Mesh
  6. Properly Define Resource Requests and Limits
  7. Code Ready for Native Compilation
  8. Conclusion

Chapter 4: Inner Development Loop

  1. Quarkus in Development Mode with Kubernetes
  2. Integrate Eclipse JKube with Spring Boot
  3. Understanding Skaffold
  4. Local Development with Mirrord
  5. Conclusion

Chapter 5: Security

  1. Manage Certificates with Cert Manager
  2. Distributing Trusted Certificates
  3. Manage Secrets
  4. Rotate Secrets and Certificates
  5. Automatic Authentication to Database
  6. Conclusion

Chapter 6: Kubernetes Native Integration

  1. Introduction to Quarkus Kubernetes
  2. Property Sources with Quarkus Kubernetes Config
  3. Quarkus Automated Testing with Kubernetes API
  4. Service Discovery and Load Balancing with Quarkus Stork
  5. Introduction to Spring Cloud Kubernetes
  6. Property Sources with Spring Cloud Kubernetes Config
  7. Reloading Properties with Spring Boot
  8. Spring Cloud Load Balancing and Service Discovery
  9. Conclusion

Chapter 7: Scalability & Performance

  1. Autoscaling with Knative
  2. Autoscaling with KEDA
  3. In-place Pod Resize for CPU Limits
  4. Native Compilation with GraalVM
  5. JDK Flight Recorder with Cryostat
  6. Conclusion

Chapter 8: Service Mesh

  1. Introduction
  2. Install Istio on Kubernetes
  3. Traffic Management
  4. Enable Tracing
  5. Fault Resilience
  6. Conclusion

Chapter 9: CI/CD on Kubernetes with Tekton and Argo CD

  1. Concept of CI/CD with Kubernetes
  2. Installation
  3. Pipeline with Tekton
  4. Import or Create Tekton Tasks
  5. Build and Run the Pipeline for a Java Application
  6. Tekton Support for Testcontainers
  7. Continuous Delivery with Argo CD
  8. Create Helm Templates
  9. Secrets Management and Encryption
  10. Manage Database Schema with GitOps Approach
  11. Conclusion

References

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