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


Both the LinuxBridge and Open vSwitch drivers and agents for Neutron provide unique solutions to the same problem of connecting virtual machine instances to the network. The use of Open vSwitch relies on flow rules to determine how traffic in and out of the environment should be processed and requires both user-space utilities and kernel modules to perform such actions. On the other hand, the use of Linux bridges requires the 8021q and bridge kernel modules and relies on the use of VLAN and VXLAN interfaces on the host to bridge instances to the physical network. For most environments, I recommend using the ML2 plugin and LinuxBridge driver and agent unless integration with OpenFlow controllers or the use of a third-party solution or plugin is required.

In the next chapter, you will be guided through the process of creating different types of networks to provide connectivity to instances. The process of creating networks is the same for both LinuxBridge- and Open vSwitch-based environments...