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

Choosing a plugin and driver

Neutron networking plugins, drivers, and agents are responsible for implementing features that provide network connectivity to and from instances. The ML2 plugin can leverage multiple layer 2 technologies simultaneously through the use of mechanism drivers. The two drivers discussed in this book, LinuxBridge and Open vSwitch, implement network connectivity in different ways.

Using the LinuxBridge driver

When configured to utilize the ML2 plugin and LinuxBridge driver, Neutron relies on the bridge, 8021q, and vxlan kernel modules to properly connect instances and other network resources to the virtual switch and forward the traffic. The LinuxBridge driver is popular for its dependability and ease of troubleshooting but lacks support for some advanced Neutron features, such as distributed virtual routers.

In a LinuxBridge-based network implementation, there are five types of interfaces managed by Neutron, which are:

  • Tap interfaces

  • Physical interfaces

  • VLAN interfaces

  • VXLAN...