Hands-On Java with Kubernetes
Hands-On Java with Kubernetes
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.
About the Author
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Table of Contents
- Introduction & Motivation
- Chapter 1: Run First Applications on Kubernetes
- Install Command-Line Tools for Development
- Generate an App using Quarkus CLI
- Deploy Quarkus Application on Kubernetes
- Expose an App Outside a Cluster
- Generate an App using Spring Boot CLI
- Generate Kubernetes Manifests with the Dekorate Library
- Spring Boot App Image with Cloud Native Buildpacks
- Conclusion
- Chapter 2: Local Environment
- Install Docker Desktop
- Install Podman Desktop
- Run Kubernetes in Docker (KinD)
- Install OpenShift Local
- Install Helm
- Conclusion
- Chapter 3: Best Practices for Java Applications with Kubernetes
- Application Logs
- Liveness and Readiness Health Checks
- Externalized Configuration
- Collecting Metrics with Prometheus
- Traffic Management and Tracing with Service Mesh
- Resource Requests and Limits
- Code Ready for Native Compilation
- Conclusion
- Chapter 4: Inner Development Loop
- Quarkus in Development Mode with Kubernetes
- Integrate Eclipse JKube with Spring Boot
- Understanding Skaffold
- Local Development with Mirrord
- Conclusion
- Chapter 5: Security
- Manage Certificates with Cert Manager
- Distributing Trusted Certificates
- Manage Secrets
- Rotate Secrets and Certificates
- Automatic Authentication to Database
- Conclusion
- Chapter 6: Kubernetes Native Integration
- Introduction to Quarkus Kubernetes
- Property Sources with Quarkus Kubernetes Config
- Quarkus Automated Testing with Kubernetes API
- Service Discovery and Load Balancing with Quarkus Stork
- Introduction to Spring Cloud Kubernetes
- Property Sources with Spring Cloud Kubernetes Config
- Reloading Properties with Spring Boot
- Spring Cloud Load Balancing and Service Discovery
- Conclusion
- Chapter 7: Scalability & Performance
- Autoscaling with Knative
- Autoscaling with KEDA
- In-place Pod Resize for CPU Limits
- Native Compilation with GraalVM
- JDK Flight Recorder with Cryostat
- Conclusion
- Chapter 8: Service Mesh
- Introduction
- Install Istio on Kubernetes
- Traffic Management
- Enable Tracing
- Fault Resilience
- Conclusion
- Chapter 9: CI/CD on Kubernetes with Tekton and Argo CD
- Concept of CI/CD with Kubernetes
- Installation
- Pipeline with Tekton
- Import or Create Tekton Tasks
- Build and Run the Pipeline for a Java Application
- Tekton Support for Testcontainers
- Continuous Delivery with Argo CD
- Create Helm Templates
- Secrets Management and Encryption
- Manage Database Schema with GitOps Approach
- Conclusion
- References
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