Swift (iOS/macOS) and Kubernetes: Deploying and Orchestrating Mobile Backends

This book is a unique practical guide that bridges the gap between the world of mobile development in Swift and modern containerization and orchestration practices using Kubernetes. If you are building server-side components for iOS/macOS applications in Swift (for example, using Vapor or Kitura) but want to go beyond simple deployment on Heroku or a VPS, this book is for you.

What the book covers:

• Kubernetes basics: Pods, Services, Deployments, Ingress, ConfigMaps, and Secrets in the context of a Swift backend.
• Building Docker images for Swift applications (including multi-stage builds to reduce size).
• Setting up CI/CD pipelines (GitHub Actions + K8s) for automatic deployment of Swift services.
• Scaling and load balancing: Horizontal Pod Autoscaler, working with sessions and WebSocket.
• Monitoring and logging: Prometheus + Grafana, collecting metrics from Swift applications.
• Security: managing secrets, network policies, TLS.
• Working with databases (PostgreSQL, Redis) in a K8s cluster.
• Migrating an existing Swift backend to Kubernetes without downtime.

Who this book is for:

• iOS/macOS developers who want to learn DevOps and manage server infrastructure independently.
• Full-stack Swift developers building backends on Vapor who need reliable deployment.
• DevOps engineers working with Kubernetes who want to understand the specifics of Swift applications.
• Technical leaders and architects choosing a stack for new projects.

What you will learn and be able to do after reading:

• Build lightweight Docker images for Swift (under 100 MB in size).
• Deploy highly available Swift services in Kubernetes (locally with minikube or in the cloud).
• Configure automatic scaling under load.
• Organize zero-downtime deployment (rolling update) for critical applications.
• Integrate a Swift backend with cluster databases and caches.
• Write Helm charts for your Swift service.
• Solve common problems: working with files, streaming, long-lived connections.

The book contains numerous ready-made code examples, Kubernetes manifests, and configurations. All examples are tested on current versions of Swift 5.9+ and Kubernetes 1.28+. Suitable for both local development and production environments.

Whether you are building an API for a fitness tracker, a chat server, or a microservice architecture, this book will give you the tools for professional deployment of Swift applications in the modern cloud world.