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 additional L3 agents

To configure HA routers, two or more L3 agents are required. To install the Neutron L3 agent, run the following command on the remaining compute nodes:

# apt-get install neutron-l3-agent

Defining an interface driver

Both the LinuxBridge and Open vSwitch mechanism drivers support HA routers, and the Neutron L3 agent must be configured to use the interface driver that corresponds to the chosen mechanism driver.

Update the Neutron L3 configuration file on the compute nodes at /etc/neutron/l3_agent.ini and specify one of the following interface drivers.

For LinuxBridge, use the following code:

interface_driver = neutron.agent.linux.interface.BridgeInterfaceDriver

For Open vSwitch, use the following code:

interface_driver = neutron.agent.linux.interface.OVSInterfaceDriver

Setting the external bridge

The external_network_bridge configuration option was discussed in detail in the previous chapter and should be configured identically...