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

A tale of two routers

The following diagram represents the tunnel between two Neutron routers that are constructed from the IPSec site connections created in the previous section:

Figure 12.15

Neutron automatically generates an ipsec.conf VPN configuration file according to the settings defined by the user. The configuration files can be found on the network node in the /var/lib/neutron/ipsec/<router_id>/etc/ directory that corresponds to the individual Neutron router. In this demonstration, the controller node is also the network node.

The following configuration files correspond to the EAST and WEST routers, respectively:

# Configuration for EastRouterVPNService
config setup

conn %default

conn ada99bbe-4e96-4252-8d12-f9c981980942