Book Image

OpenStack Networking Essentials

By : James Denton, Derek Chamorro
Book Image

OpenStack Networking Essentials

By: James Denton, Derek Chamorro

Overview of this book

The OpenStack Networking API offers users the ability to create and manage both basic and complex network architectures that blend the virtual and physical network infrastructure. This book kicks off by describing various components of Openstack Neutron and installing Ubuntu OpenStack based on Canonical's process. Further on, you will use various methods to interface with Neutron to create and manage network resources. You will also get to grips with the relationship between ports, networks, and subnets through diagrams and explanations, and see how the logical components are implemented via plugins and agents. Moving forward, you will learn how virtual switches are implemented and how to build Neutron routers. You will also configure networks, subnets, and routers to provide connectivity to instances using simple examples. At the end, you will configure and manage security groups, and will observe how these rules translate to iptables rules on the host machines. By the end of the book, you will be able to build basic network architectures using Neutron networks and routers in no time.
Table of Contents (15 chapters)
OpenStack Networking Essentials
Credits
About the Author
www.PacktPub.com
Preface
Index

Managing routers with the Neutron client


The Neutron command-line client provides additional functionality not found in the Horizon dashboard, including the ability to specify the type of router to create.

Creating and listing routers

Listing networks with the Neutron client is as easy as using the neutron router-list command, shown here:

Running the router-list command as an administrator will return all routers known to Neutron, while running the command as an ordinary user will only return routers associated with the user's tenant or project. As an example, let's authenticate as the demo user and run the same command to see what is returned:

As expected, no routers were returned. Routers, like other OpenStack resources, are associated with a single tenant or project and can only be viewed or managed by the respective users of those projects or by administrators.

Creating a router

Creating a router with the Neutron client can be accomplished with the neutron router-create command. In this example...