Book Image

Python Microservices Development – 2nd edition - Second Edition

By : Simon Fraser, Tarek Ziadé
Book Image

Python Microservices Development – 2nd edition - Second Edition

By: Simon Fraser, Tarek Ziadé

Overview of this book

The small scope and self-contained nature of microservices make them faster, cleaner, and more scalable than code-heavy monolithic applications. However, building microservices architecture that is efficient as well as lightweight into your applications can be challenging due to the complexity of all the interacting pieces. Python Microservices Development, Second Edition will teach you how to overcome these issues and craft applications that are built as small standard units using proven best practices and avoiding common pitfalls. Through hands-on examples, this book will help you to build efficient microservices using Quart, SQLAlchemy, and other modern Python tools In this updated edition, you will learn how to secure connections between services and how to script Nginx using Lua to build web application firewall features such as rate limiting. Python Microservices Development, Second Edition describes how to use containers and AWS to deploy your services. By the end of the book, you’ll have created a complete Python application based on microservices.
Table of Contents (14 chapters)
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Finding out where to go

When we make a web request to a service, we need to know which Uniform Resource Locator (URL) to use. Most of the examples in this book use hardcoded URLs—that is, they are written into the source code. This is nice and easy to read for an example, but can be a problem when maintaining software. What happens when a service gets a new URI, and its hostname or IP address changes? It might move between AWS regions due to a failure or be migrated from Google Cloud Platform to Microsoft Azure. An API update can make the path to a resource change, even if the hostname or IP address has not updated.

We want to pass in data about which URLs to use as configuration to our application. There are several options to manage more configuration options without adding them directly to the code, such as environment variables and service discovery.

Environment variables

Container-based environments are common these days, and we will discuss them in more...