Book Image

Learn Docker - Fundamentals of Docker 18.x

By : Dr. Gabriel N. Schenker
Book Image

Learn Docker - Fundamentals of Docker 18.x

By: Dr. Gabriel N. Schenker

Overview of this book

Docker containers have revolutionized the software supply chain in small and big enterprises. Never before has a new technology so rapidly penetrated the top 500 enterprises worldwide. Companies that embrace containers and containerize their traditional mission-critical applications have reported savings of at least 50% in total maintenance cost and a reduction of 90% (or more) of the time required to deploy new versions of those applications. Furthermore they are benefitting from increased security just by using containers as opposed to running applications outside containers. This book starts from scratch, introducing you to Docker fundamentals and setting up an environment to work with it. Then we delve into concepts such as Docker containers, Docker images, Docker Compose, and so on. We will also cover the concepts of deployment, orchestration, networking, and security. Furthermore, we explain Docker functionalities on public clouds such as AWS. By the end of this book, you will have hands-on experience working with Docker containers and orchestrators such as SwarmKit and Kubernetes.
Table of Contents (21 chapters)
Title Page
Packt Upsell
Contributors
Preface
Index

Kubernetes support in Docker for Desktop


Starting from version 18.01-ce, Docker for Mac and Docker for Windows have started to support Kubernetes out of the box. Developers that want to deploy their containerized applications to Kubernetes can use this orchestrator instead of SwarmKit. Kubernetes support by default is turned off and has to be enabled in the settings. The first time Kubernetes is enabled, Docker for Mac or Windows will need a moment to download all components that are needed to create a single node Kubernetes cluster. Contrary to Minikube, which is also a single node cluster, the version provided by the Docker tools uses containerized versions of all Kubernetes components:

Kubernetes support in Docker for Mac and Windows

The preceding image gives a rough overview on how Kubernetes support has been added to Docker for Mac and Windows. Docker for Mac uses hyperkit to run a LinuxKit-based VM. Docker for Windows uses Hyper-V to achieve the same. Inside the VM, the Docker engine...