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


Distributed virtual routers have a positive impact on the network architecture as a whole by pushing east-west traffic between instances and north-south traffic through floating IPs to the compute nodes, removing bottlenecks and single points of failure seen in the legacy model. Traffic from virtual machines without floating IPs must still traverse a centralized network node when routing to external networks. This is seen as a compromise, however, given that a high number of IPv4 addresses would be required if SNAT were handled at the compute node layer.

While distributed virtual routers help provide parity with nova-network's multi-host capabilities, they are not without their limitations. Work is under way to add support to distributed virtual routers for IPv6, advanced services such as LBaaS, FWaaS, and VPNaaS, conversions from legacy to distributed routers, and more. Implementing a distributed virtual router is transparent to the user, but it is operationally complex and considerably...