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

Chapter 5. Data Volumes and System Management

In the last chapter, we learned how to build and share our own container images. Particular focus was put on how to build images that are as small as possible by only containing artifacts that are really needed by the containerized application.

In this chapter, we are going to learn how we can work with stateful containers, that is containers that consume and produce data. We will also learn how to keep our Docker environment clean and free from unused resources. Last but not least, we will be looking into the stream of events that a Docker engine is producing.

Here is a list of the topics we're going to discuss:

  • Creating and mounting data volumes
  • Sharing data between containers
  • Using host volumes
  • Defining volumes in images
  • Obtaining exhaustive Docker system information
  • Listing resource consumption
  • Pruning unused resources
  • Consuming Docker system events

After working through this chapter, you will be able to:

  • Create, delete, and list data volumes
  • Mount an...