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

Floating IP management

Neutron offers a number of commands that can be used to create and manage floating IPs. The primary commands associated with floating IPs include:

  • floatingip-associate

  • floatingip-create

  • floatingip-delete

  • floatingip-disassociate

  • floatingip-list

  • floatingip-show

Creating floating IPs in the CLI

If you recall from previous chapters, IP addresses are not assigned directly to instances. Instead, an IP address is associated with a Neutron port, and this port is logically mapped to an instance or other network resource.

When a floating IP is created, it must be associated with a Neutron port. To create a floating IP from within the CLI, use the following Neutron floatingip-create command:

usage:    floatingip-create [--tenant-id TENANT_ID] 
          [--port-id PORT_ID] [--fixed-ip-address FIXED_IP_ADDRESS]
          [--floating-ip-address FLOATING_IP_ADDRESS]

Floating IP addresses can only be used within the tenant or project in which they were created. Using...