Kubernetes for Java Developers

Chapter 2. Deploying a Java Application to Kubernetes

This chapter will explain how to start a Kubernetes cluster. It will also demonstrate CRUD (create, read, update, and delete) operations for different resources on this cluster. Service discovery and scaling the number of containers in a service will be discussed as well. Finally, you’ll learn how to deploy a simple Java application to Kubernetes using Maven.

All resource files in this chapter are available in the GitHub repo for this book.

Managing Kubernetes Cluster

You can create a Kubernetes cluster on your laptop, virtual machine (VM), cloud provider, or a rack of bare-metal servers. For development purposes, it’s easiest to start with a one-node cluster using Minikube. For production purposes, hosted solutions or cloud-based solutions provide the scalability and higher availability you’ll need. A complete list of solutions to create Kubernetes clusters is available at the Kubernetes website.

This section will explain how to create and shut down a development Kubernetes cluster using Minikube. The deployment of such an application typically happens on a cloud platform such as Amazon Web Services (AWS). A common way to start a single-master cluster and a highly available cluster using Kops on AWS is also explained.

Development Cluster Using Minikube

Minikube runs a single-node Kubernetes cluster inside a VM on your laptop. This allows you to try out Kubernetes on your local machine easily. Minikube packages and configures ...