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.

Preface

What this book covers

What you need for this book

Who this book is for

Reader feedback

Customer support

Free Chapter

Introduction to Docker

Introduction to Docker

The idea behind Docker

Virtualization and containerization compared

Docker concepts - images and containers

Additional tools

Installing Docker

Networking and Persistent Storage

Networking and Persistent Storage

Networking commands

Creating and inspecting a network

Connecting a container to the network

Exposing ports and mapping ports

Persistent storage

Volume-related commands

Creating a volume

Removing a volume

Working with Microservices

Working with Microservices

An introduction to microservices

Monolithic versus microservices

Maintaining data consistency

The Docker role

Kubernetes' role

When to use the microservice architecture

Creating Java Microservices

Creating Java Microservices

Introduction to REST

Coding the Spring Boot microservice

Running the application

Spring Initializr

Creating Images with Java Applications

Creating Images with Java Applications

Dockerfile instructions

Running Containers with Java Applications

Running Containers with Java Applications

Starting and stopping containers

Container running modes

Monitoring containers

Restart policies

Runtime constraints on resources

Running with Maven

Introduction to Kubernetes

Introduction to Kubernetes

Why do we need Kubernetes?

Basic Kubernetes concepts

Using Kubernetes with Java

Using Kubernetes with Java

Installing Minikube

Installing kubectl

Deploying on the Kubernetes cluster

Minikube addons

Working with the Kubernetes API

Working with the Kubernetes API

Admission control

Deploying Java on Kubernetes in the Cloud

Deploying Java on Kubernetes in the Cloud

Benefits of using the cloud, Docker, and Kubernetes

Installing the tools

Configuring Amazon AWS

Creating an administrative user

Creating the cluster

More Resources

Customer Reviews

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Introduction to Kubernetes

After reading Chapter 6, Running Containers with Java Applications, you now have a lot of knowledge about using Docker to package your Java applications. It's now time to move even further and focus on what we are missing--the container management and orchestration. There are some suitable tools on the market, such as Nomad, Docker Swarm, Apache Mesos, or AZK, for example. In this chapter, we will focus on probably the most popular one, Kubernetes. Kubernetes (sometimes referred to as k8s) is an open source orchestration system for Docker containers, created by Google in 2015. The first unified container management system developed at Google was the system, internally called, Borg; Kubernetes is its descendant. The list of topics covered in this chapter will be:

Why and when we need container management
An introduction to Kubernetes
Basic Kubernetes...