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)
More Resources

Deploying on the Kubernetes cluster

We begin the process of deploying our software on the Kubernetes cluster by defining a service. As you remember from Chapter 7, Introduction to Kubernetes, services abstract a set of Pods as a single IP and port, allow simple TCP/UDP load, and allow the list of Pods to change dynamically. Let's start with service creation.

Creating a service

By default, each Pod is only accessible by its internal IP address within the Kubernetes cluster. To make the container accessible from outside the Kubernetes virtual network, we need to expose the Pod as a Kubernetes Service. To create a service, we are going to use the simple .yaml file, with a service manifest. YAML is a human-readable data serialization...