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The Docker Workshop

You're reading from   The Docker Workshop Learn how to use Docker containers effectively to speed up the development process

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Product type Paperback
Published in Oct 2020
Publisher Packt
ISBN-13 9781838983444
Length 792 pages
Edition 1st Edition
Tools
Concepts
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Authors (5):
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Engy Fouda Engy Fouda
Author Profile Icon Engy Fouda
Engy Fouda
Onur Yılmaz Onur Yılmaz
Author Profile Icon Onur Yılmaz
Onur Yılmaz
Sathsara Sarathchandra Sathsara Sarathchandra
Author Profile Icon Sathsara Sarathchandra
Sathsara Sarathchandra
Aric Renzo Aric Renzo
Author Profile Icon Aric Renzo
Aric Renzo
Vincent Sesto Vincent Sesto
Author Profile Icon Vincent Sesto
Vincent Sesto
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Toc

Table of Contents (17) Chapters Close

Preface
1. Running My First Docker Container 2. Getting Started with Dockerfiles FREE CHAPTER 3. Managing Your Docker Images 4. Multi-Stage Dockerfiles 5. Composing Environments with Docker Compose 6. Introduction to Docker Networking 7. Docker Storage 8. CI/CD Pipeline 9. Docker Swarm 10. Kubernetes 11. Docker Security 12. Best Practices 13. Monitoring Docker Metrics 14. Collecting Container Logs 15. Extending Docker with Plugins Appendix

The Container Life Cycle

Containers are crafted from their base images. The container inherits the filesystem of the image by creating a thin read/write layer on top of the image layers' stack. The base images stay intact, and no changes are made to them. All your changes happen in that top layer of the container. For example, say you create a container of ubuntu: 14.08. This image does not have the wget package in it. When you install the wget package, you actually install it on the top layer. So, you have a layer for the base image, and on top of it, another layer for wget.

If you install the Apache server as well, it will be the third layer on top of both of the previous layers. To save all your changes, you need to commit all these changes to a new image because you cannot write over the base image. If you do not commit the changes to a new image, these changes will be deleted with the container's removal.

The container undergoes many other states during its life...

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