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Learning Docker

You're reading from   Learning Docker Build, ship, and scale faster

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Product type Paperback
Published in May 2017
Publisher
ISBN-13 9781786462923
Length 300 pages
Edition 2nd Edition
Tools
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Authors (3):
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Jeeva S. Chelladhurai Jeeva S. Chelladhurai
Author Profile Icon Jeeva S. Chelladhurai
Jeeva S. Chelladhurai
Pethuru Raj Pethuru Raj
Author Profile Icon Pethuru Raj
Pethuru Raj
Vinod Singh Vinod Singh
Author Profile Icon Vinod Singh
Vinod Singh
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Toc

Table of Contents (13) Chapters Close

Preface 1. Getting Started with Docker 2. Handling Docker Containers FREE CHAPTER 3. Building Images 4. Publishing Images 5. Running Your Private Docker Infrastructure 6. Running Services in a Container 7. Sharing Data with Containers 8. Orchestrating Containers 9. Testing with Docker 10. Debugging Containers 11. Securing Docker Containers 12. The Docker Platform – Distinct Capabilities and Use Cases

Exposing container services

So far, we successfully launched an HTTP service and accessed the service from the Docker host as well as another container within the same Docker host. Furthermore, as demonstrated in the Building images from containers section of Chapter 2, Handling Docker Containers, the container is able to successfully install the wget package by making a connection to the publicly available APT repository over the Internet. Nonetheless, the outside world cannot access the service offered by a container by default. At the outset, this might seem like a limitation in the Docker technology. However, the fact is, the containers are isolated from the outside world by design.

Docker achieves network isolation for the containers by the IP address assignment criteria, as enumerated here:

  • Assigning a private IP address to the container, which is not reachable from an external network
  • Assigning an IP address...
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