Kotlin and Kubernetes: Microservices Development and Orchestration

This book is a practical guide to creating modern microservice applications in Kotlin and deploying them in a Kubernetes cluster. The author, Alexey Sokolov, an experienced developer and DevOps engineer, shares proven patterns and approaches that will help you transition from monolithic architecture to the cloud.

The book starts with the basics: you will learn how to set up a local development environment, get acquainted with key Kotlin concepts (coroutines, data classes, null safety), and learn how to design REST APIs using Ktor or Spring Boot. Then you will dive into the world of containerization with Docker and orchestration with Kubernetes.

The main focus is on practical aspects:

• Creating and packaging Kotlin microservices into Docker images
• Setting up Kubernetes: Pods, Deployments, Services, ConfigMaps, and Secrets
• Implementing Service Discovery, Load Balancing, and Health Checks
• Working with databases in Kubernetes (PostgreSQL, MongoDB) and configuration management
• Monitoring, logging, and debugging applications in the cluster (Prometheus, Grafana, ELK)
• CI/CD pipelines for automated build and deployment (GitLab CI, GitHub Actions)
• Advanced topics: Helm charts, Istio service mesh, update strategies (Rolling Update, Canary)

The book is intended for:

• Java/Kotlin developers looking to master microservice architecture and Kubernetes
• DevOps engineers who want to understand the specifics of working with Kotlin applications
• Team Leads and architects planning a migration to cloud technologies
• Students and anyone interested in modern software development

The reader will learn:

• How to write efficient and secure microservices in Kotlin
• How to design applications ready for scalability and fault tolerance
• How to automate deployment and manage the service lifecycle
• How to solve real-world problems: network interaction, state management, security

All code examples are available for download and come with detailed comments. The book is written in simple and clear language, with an emphasis on practice rather than theory. After reading it, you will be able to independently build a full-fledged microservice system in Kotlin running under Kubernetes.

This edition will become a desktop reference for anyone who wants to stay on trend with modern cloud technologies and increase their value as a specialist.