Book Image

Learning OpenStack Networking (Neutron)

By : James Denton
Book Image

Learning OpenStack Networking (Neutron)

By: James Denton

Overview of this book

OpenStack Neutron is an OpenStack component that provides networking as a service for other OpenStack services to architect networks and create virtual machines through its API. This API lets you define network connectivity in order to leverage network capabilities to cloud deployments. Through this practical book, you will build a strong foundational knowledge of Neutron, and will architect and build an OpenStack cloud using advanced networking features. We start with an introduction to OpenStack Neutron and its various components, including virtual switching, routing, FWaaS, VPNaaS, and LBaaS. You’ll also get hands-on by installing OpenStack and Neutron and its components, and use agents and plugins to orchestrate network connectivity and build a virtual switching infrastructure. Moving on, you’ll get to grips with the HA routing capabilities utilizing VRRP and distributed virtual routers in Neutron. You’ll also discover load balancing fundamentals, including the difference between nodes, pools, pool members, and virtual IPs. You’ll discover the purpose of security groups and learn how to apply the security concept to your cloud/tenant/instance. Finally, you' ll configure virtual private networks that will allow you to avoid the use of SNAT and floating IPs when connecting to remote networks.
Table of Contents (21 chapters)
Learning OpenStack Networking (Neutron) Second Edition
About the Author
About the Reviewers

Attaching instances to networks

Using the Nova command-line client, instances can be attached to networks in a couple of ways. When first booted, instances can be attached to one or more networks using the nova boot command. Running instances can be attached to additional networks using the nova interface-attach command. Both methods are explained in the upcoming sections.

Attaching instances to networks using nova boot

The following nova boot options provide a single network interface to an instance.

Users can specify a network identified by the network's UUID, as follows:

--nic net-id=<UUID of Neutron network>

In the preceding example, Nova interfaces with the Neutron API to create a port using the network ID provided by the user, and Neutron returns details of the port back to Nova for use by the instance.

As an alternative, users can specify a port identified by the port's UUID, as follows:

--nic port-id=<UUID of Neutron network>

In the preceding example, Neutron associates the instance...