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 VPNaaS

The neutron-vpn-agent service typically runs on the network node, which in this environment is controller01.

Issue the following command on the controller node to install the VPN agent and its dependencies, including the strongSwan VPN software package:

# apt-get install neutron-vpn-agent

During the installation, you may notice the following message:

The following packages will be REMOVED:

Here, the neutron-vpn-agent service replaces neutron-l3-agent but inherits all of its functionality and configuration.


The agents are mutually exclusive and should not be installed simultaneously. Failure to heed this warning will result in unexpected issues.

Configuring the Neutron VPN agent service

Neutron stores the VPN agent configuration in the /etc/neutron/vpn_agent.ini file. The most common configuration options will be covered in the upcoming sections.

Defining a device driver

To manage a VPN service or device, the Neutron VPN agent must be configured to use a device...