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

Working with security groups

Security groups can be managed in either the Neutron CLI or the Horizon dashboard. Both methods offer a fairly comprehensive experience and are discussed in the following sections.

Managing security groups in the CLI

From within the Neutron command-line client, a number of commands can be used to manage security groups, including:

  • security-group-create

  • security-group-delete

  • security-group-list

  • security-group-rule-create

  • security-group-rule-delete

  • security-group-rule-list

  • security-group-rule-show

  • security-group-show

  • security-group-update

Creating security groups in the CLI

To create a security group within the CLI, use the Neutron security-group-create command as follows:

Usage:   security-group-create [--tenant-id TENANT_ID]
         [--description DESCRIPTION] NAME


By default, security groups in Neutron are prepopulated with two egress rules that allow all outbound traffic over IPv4 and IPv6. Ingress traffic from hosts outside of the associated group is not permitted...