Book Image

Hands-On Docker for Microservices with Python

By : Jaime Buelta
Book Image

Hands-On Docker for Microservices with Python

By: Jaime Buelta

Overview of this book

Microservices architecture helps create complex systems with multiple, interconnected services that can be maintained by independent teams working in parallel. This book guides you on how to develop these complex systems with the help of containers. You’ll start by learning to design an efficient strategy for migrating a legacy monolithic system to microservices. You’ll build a RESTful microservice with Python and learn how to encapsulate the code for the services into a container using Docker. While developing the services, you’ll understand how to use tools such as GitHub and Travis CI to ensure continuous delivery (CD) and continuous integration (CI). As the systems become complex and grow in size, you’ll be introduced to Kubernetes and explore how to orchestrate a system of containers while managing multiple services. Next, you’ll configure Kubernetes clusters for production-ready environments and secure them for reliable deployments. In the concluding chapters, you’ll learn how to detect and debug critical problems with the help of logs and metrics. Finally, you’ll discover a variety of strategies for working with multiple teams dealing with different microservices for effective collaboration. By the end of this book, you’ll be able to build production-grade microservices as well as orchestrate a complex system of services using containers.
Table of Contents (19 chapters)
Free Chapter
1
Section 1: Introduction to Microservices
3
Section 2: Designing and Operating a Single Service – Creating a Docker Container
7
Section 3:Working with Multiple Services – Operating the System through Kubernetes
13
Section 4: Production-Ready System – Making It Work in Real-Life Environments

Configuring Travis CI

Travis CI (https://travis-ci.com/) is a popular continuous integration service that's freely available for public GitHub projects. Integration with GitHub is very simple and it allows you to configure the platform it runs on, such as macOS, Linux, or even iOS.

Travis CI integrates tightly with GitHub, so you only need to log in to GitHub to be able to access it. We'll see how to connect our project to it.

For clarity, only the code in this chapter will be hooked up to Travis.

Travis works a bit differently from other CI tools in that it creates independent jobs by starting a new VM. This means that any artifact created for a previous stage needs to be copied somewhere else to be downloaded at the start of the next stage.

This makes things a bit unpractical sometimes, and an easy solution is to build multiple times for each individual job.

Configuring...