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

Installing and configuring Neutron components

To configure distributed virtual routers, there are a few required components that must be installed and configured:

  • The ML2 plugin

  • The L2population mechanism driver

  • The Open vSwitch mechanism driver

  • The layer 3 agent installed on all network and compute nodes

  • The external bridge configured on all network and compute nodes

Installing additional L3 agents

To install the Neutron L3 agent, run the following command on the remaining compute nodes if it has not yet been installed:

# apt-get install neutron-l3-agent

Defining an interface driver

Open vSwitch and the Open vSwitch mechanism driver are required to enable and utilize distributed virtual routers.

Update the Neutron L3 configuration file on the compute nodes and specify the following interface driver:

interface_driver = neutron.agent.linux.interface.OVSInterfaceDriver

Enabling distributed mode

The ML2 plugin is required to operate distributed virtual routers and must be configured accordingly...