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Troubleshooting Docker

You're reading from   Troubleshooting Docker Develop, test, automate, and deploy production-ready Docker containers

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Product type Paperback
Published in Mar 2017
Publisher Packt
ISBN-13 9781783552344
Length 290 pages
Edition 1st Edition
Tools
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Authors (4):
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John Wooten John Wooten
Author Profile Icon John Wooten
John Wooten
Navid Ahmed Shaikh Navid Ahmed Shaikh
Author Profile Icon Navid Ahmed Shaikh
Navid Ahmed Shaikh
Vaibhav Kohli Vaibhav Kohli
Author Profile Icon Vaibhav Kohli
Vaibhav Kohli
Rajdeep Dua Rajdeep Dua
Author Profile Icon Rajdeep Dua
Rajdeep Dua
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Toc

Table of Contents (11) Chapters Close

Preface 1. Understanding Container Scenarios and an Overview of Docker FREE CHAPTER 2. Docker Installation 3. Building Base and Layered Images 4. Devising Microservices and N-Tier Applications 5. Moving Around Containerized Applications 6. Making Containers Work 7. Managing the Networking Stack of a Docker Container 8. Managing Docker Containers with Kubernetes 9. Hooking Volume Baggage 10. Docker Deployment in a Public Cloud - AWS and Azure

docker0 bridge


docker0 bridge is the heart of default networking. When the Docker service is started, a Linux bridge is created on the host machine. The interfaces on the containers talk to the bridge and the bridge proxies to the external world. Multiple containers on the same host can talk to each other through the Linux bridge.

docker0 can be configured via the --net flag, and has four modes in general:

  • --net default: In this mode, the default bridge is used as the bridge for containers to connect to each other

  • --net=none: With this flag, the container created is truly isolated and cannot connect to the network

  • --net=container:$container2: With this flag, the container created shares its network namespace with the container named $container2

  • --net=host: In this mode, the container created shares its network namespace with the host

Troubleshooting Docker bridge configuration

In this section, we will look at how the container ports are mapped to host ports and how we can troubleshoot the...

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