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

Configuring Neutron

Neutron uses default settings to determine the type of routers that tenants are allowed to create as well as the number of routers that should be deployed across L3 agents.

The following default settings are specified within the Neutron configuration file at /etc/neutron/neutron.conf and only need to be modified on the host running the Neutron API service. In this environment, the neutron-server service runs on the controller node:

# =========== items for l3 extension ==============
# Enable high availability for virtual routers.
# l3_ha = False
# Maximum number of l3 agents which a HA router will be 
# scheduled on. If it is set to 0 the router will be scheduled on
# every agent.
# max_l3_agents_per_router = 3
# Minimum number of l3 agents which a HA router will be 
# scheduled on. The default value is 2.
# min_l3_agents_per_router = 2
# CIDR of the administrative network if HA mode is enabled
# l3_ha_net_cidr =
# =========== end of items for l3...