Book Image

Hands-On Swift 5 Microservices Development

Book Image

Hands-On Swift 5 Microservices Development

Overview of this book

The capabilities of the Swift programming language are extended to server-side development using popular frameworks such as Vapor. This enables Swift programmers to implement the microservices approach to design scalable and easy-to-maintain architecture for iOS, macOS, iPadOS, and watchOS applications. This book is a complete guide to building microservices for iOS applications. You’ll start by examining Swift and Vapor as backend technologies and compare them to their alternatives. The book then covers the concept of microservices to help you get started with developing your first microservice. Throughout this book, you’ll work on a case study of writing an e-commerce backend as a microservice application. You’ll understand each microservice as it is broken down into details and written out as code throughout the book. You’ll also become familiar with various aspects of server-side development such as scalability, database options, and information flow for microservices that are unwrapped in the process. As you advance, you’ll get to grips with microservices testing and see how it is different from testing a monolith application. Along the way, you’ll explore tools such as Docker, Postman, and Amazon Web Services. By the end of the book, you’ll be able to build a ready-to-deploy application that can be used as a base for future applications.
Table of Contents (19 chapters)

Scaling and monitoring using DigitalOcean

When you are using DigitalOcean, you currently only have one option to autoscale: using their managed Kubernetes service. You will need to set up your application using Kubernetes first. The use and configuration of Kubernetes go beyond what this book covers, but if you do have a Kubernetes setup running on DigitalOcean, you can easily set up autoscaling via the Nodes tab, as shown in the following screenshot:

When you hit Resize or Autoscale, as seen in the previous screenshot, you can pick your options, as follows:

You can specify the number of pods (if you need a reminder of what pods are, check out Chapter 14, Docker and the Cloud, again) you want to have as a maximum and a minimum (at least one).

DigitalOcean is most upfront with costs and prices. Budget-conscious projects have a clear cost vision with DigitalOcean.

The scaling...