Book Image

Docker and Kubernetes for Java Developers

By : Jarosław Krochmalski
Book Image

Docker and Kubernetes for Java Developers

By: Jarosław Krochmalski

Overview of this book

Imagine creating and testing Java EE applications on Apache Tomcat Server or Wildfly Application server in minutes along with deploying and managing Java applications swiftly. Sounds too good to be true? But you have a reason to cheer as such scenarios are only possible by leveraging Docker and Kubernetes. This book will start by introducing Docker and delve deep into its networking and persistent storage concepts. You will then proceed to learn how to refactor monolith application into separate services by building an application and then packaging it into Docker containers. Next, you will create an image containing Java Enterprise Application and later run it using Docker. Moving on, the book will focus on Kubernetes and its features and you will learn to deploy a Java application to Kubernetes using Maven and monitor a Java application in production. By the end of the book, you will get hands-on with some more advanced topics to further extend your knowledge about Docker and Kubernetes.
Table of Contents (12 chapters)
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Creating Images with Java Applications

Now that we have a simple, but functional Java microservice based on Spring Bootstrap, we can go further. Before we deploy it using Kubernetes, let's package it as a Docker image. In this chapter, we will create a Docker image containing our application, and we will dockerize a Spring Boot application to run it in an isolated environment, a container.

Topics covered in this chapter will be:

  • Creating a Dockerfile
  • Dockerfile instructions
  • Building the image
  • Creating and removing images

Let's begin with the definition of a Dockerfile, which will be the definition of our container.