Book Image

Continuous Delivery with Docker and Jenkins, 3rd Edition - Third Edition

By : Rafał Leszko
Book Image

Continuous Delivery with Docker and Jenkins, 3rd Edition - Third Edition

By: Rafał Leszko

Overview of this book

This updated third edition of Continuous Delivery with Docker and Jenkins will explain the advantages of combining Jenkins and Docker to improve the continuous integration and delivery process of app development. You’ll start by setting up a Docker server and configuring Jenkins on it. Next, you’ll discover steps for building applications and microservices on Dockerfiles and integrating them with Jenkins using continuous delivery processes such as continuous integration, automated acceptance testing, configuration management, and Infrastructure as Code. Moving ahead, you'll learn how to ensure quick application deployment with Docker containers, along with scaling Jenkins using Kubernetes. Later, you’ll explore how to deploy applications using Docker images and test them with Jenkins. Toward the concluding chapters, the book will focus on missing parts of the CD pipeline, such as the environments and infrastructure, application versioning, and non-functional testing. By the end of this continuous integration and continuous delivery book, you’ll have gained the skills you need to enhance the DevOps workflow by integrating the functionalities of Docker and Jenkins.
Table of Contents (16 chapters)
1
Section 1 – Setting Up the Environment
5
Section 2 – Architecting and Testing an Application
9
Section 3 – Deploying an Application

Exercises

You've learned a lot about how to configure the continuous integration process. Since practice makes perfect, I recommend doing the following exercises:

  • Create a Python program that multiplies two numbers passed as command-line parameters. Add unit tests and publish the project on GitHub:
    1. Create two files: calculator.py and test_calculator.py.
    2. You can use the unittest library at https://docs.python.org/3/library/unittest.html.
    3. Run the program and the unit test.
  • Build the continuous integration pipeline for the Python calculator project:
    1. Use Jenkinsfile to specify the pipeline.
    2. Configure the trigger so that the pipeline runs automatically in case of any commits to the repository.
    3. The pipeline doesn't need the Compile step since Python is an interpretable language.
    4. Run the pipeline and observe the results.
    5. Try to commit the code that breaks the pipeline build and observe how it is visualized in Jenkins.