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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
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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

Stateful versus Stateless Containers/Services

Containers and services can run in two modes: stateful and stateless. A stateless service is the one that does not retain persistent data. This type is much easier to scale and update than the stateful one. A stateful service requires persistent storage (as in databases). Therefore, it is harder to dockerize because stateful services need synchronization with the other components of the application.

Say you're dealing with an application that needs a certain file in order to work correctly. If this file is saved inside a container, as in the stateful mode, when this container is removed for whatever reason, the whole application crashes. However, if this file is saved in a volume or an external database, any container will be able to access it, and the application will work fine. Say business is booming and we need to scale up the number of containers running to fulfill the clients' needs. All the containers will be able to...

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