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

Neutron ports

A port in Neutron is a logical connection of a virtual network interface to a subnet. Ports can be associated with virtual machine instances, DHCP servers, routers, firewalls, load balancers, and more. Ports can even be created simply to reserve IP addresses from a subnet. Neutron stores port relationships in the Neutron database and uses this information to build switching connections at the physical or virtual switch layer through the networking plugin and agent.

To retrieve a list of all Neutron ports, use the Neutron port-list command, as shown in the following screenshot:

Figure 5.26

Use the Neutron port-show command to see the details of a particular port:

Figure 5.27

The port pictured in Figure 5.27 is owned by an interface used within a DHCP namespace. The network_id field reveals the network to be 3282acdf-85d1-47ea-b734-f5625cfca027, otherwise known as the MyFlatNetwork network, which was created earlier in this chapter.

Use the ip netns exec command to execute ip addr...