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Containers for Developers Handbook

You're reading from   Containers for Developers Handbook A practical guide to developing and delivering applications using software containers

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Product type Paperback
Published in Nov 2023
Publisher Packt
ISBN-13 9781805127987
Length 490 pages
Edition 1st Edition
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Author (1):
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Francisco Javier Ramírez Urea Francisco Javier Ramírez Urea
Author Profile Icon Francisco Javier Ramírez Urea
Francisco Javier Ramírez Urea
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Toc

Table of Contents (20) Chapters Close

Preface 1. Part 1:Key Concepts of Containers
2. Chapter 1: Modern Infrastructure and Applications with Docker FREE CHAPTER 3. Chapter 2: Building Docker Images 4. Chapter 3: Sharing Docker Images 5. Chapter 4: Running Docker Containers 6. Chapter 5: Creating Multi-Container Applications 7. Part 2:Container Orchestration
8. Chapter 6: Fundamentals of Container Orchestration 9. Chapter 7: Orchestrating with Swarm 10. Chapter 8: Deploying Applications with the Kubernetes Orchestrator 11. Part 3:Application Deployment
12. Chapter 9: Implementing Architecture Patterns 13. Chapter 10: Leveraging Application Data Management in Kubernetes 14. Chapter 11: Publishing Applications 15. Chapter 12: Gaining Application Insights 16. Part 4:Improving Applications’ Development Workflow
17. Chapter 13: Managing the Application Life Cycle 18. Index 19. Other Books You May Enjoy

Improving security by signing container images

As we mentioned in the previous section, a digest is the only way we can validate which image we are really using. In this section, we will review how we can improve this by signing images. This will really ensure we use the right images, as we can check the signature and verify the ownership of every image.

We are going to analyze and learn about the Docker methodology used to sign images, but there are other methods available. We will use Cosign in the Labs section, which seems easier and integrates very well with the Kubernetes container orchestrator.

Docker created Docker Content Trust some years ago to integrate digital signatures in the container images management workflow and associate signatures with image tags. We will be able to have repositories with signed and unsigned images, for example, for local tests before moving on to a new stage. You, as a developer, create your images and decide which ones should be signed.

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