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

Cleaning up

If you finish playing with your deployment and services or would like to start from the beginning, you can do some cluster cleaning by removing the deployment or services:

$ kubectl delete deployment rest-example
$ kubectl delete service rest-example      

This code can also be combined in one command, for example:

$ kubectl delete service,deployment rest-example

The kubectl delete supports label selectors and namespaces. Let's see some other examples of the command in a table:

Example command


kubectl delete pod,service baz foo

Delete pods and services with same names baz and foo

kubectl delete pods,services -l name=myLabel

Delete pods and services with label name=myLabel

kubectl -n my-ns delete po,svc --all

Delete all pods and services in namespace my-ns

To stop the minikube cluster, issue simply:

$ minikube stop 

If you would...