Book Image

Docker Networking Cookbook

Book Image

Docker Networking Cookbook

Overview of this book

Networking functionality in Docker has changed considerably since its first release, evolving to offer a rich set of built-in networking features, as well as an extensible plugin model allowing for a wide variety of networking functionality. This book explores Docker networking capabilities from end to end. Begin by examining the building blocks used by Docker to implement fundamental containing networking before learning how to consume built-in networking constructs as well as custom networks you create on your own. Next, explore common third-party networking plugins, including detailed information on how these plugins inter-operate with the Docker engine. Consider available options for securing container networks, as well as a process for troubleshooting container connectivity. Finally, examine advanced Docker networking functions and their relevant use cases, tying together everything you need to succeed with your own projects.
Table of Contents (18 chapters)
Docker Networking Cookbook
Credits
About the Author
About the Reviewer
www.PacktPub.com
Preface
Index

Using an OVS bridge to connect Docker hosts


The previous recipe showed how we can use OVS in place of a standard Linux bridge. This, by itself, isn't very interesting since it doesn't do a lot more than a standard Linux bridge can. What may be interesting is using some of the more advanced features of OVS in conjunction with your Docker containers. For instance, once the OVS bridges are created, it's rather trivial to provision GRE tunnels between two distinct Docker hosts. This would allow any containers connected to either Docker host to talk directly to each other. In this recipe, we'll discuss the configuration required to connect two Docker hosts using an OVS provided GRE tunnel.

Note

Again, this recipe is for the purpose of example only. This behavior is already supported by Docker's user-defined overlay network type. If for some reason you need to use GRE rather than VXLAN, this might be a suitable alternative. As always, make sure that you use any Docker native networking constructs...