Book Image

Learning OpenStack Networking - Third Edition

By : James Denton
Book Image

Learning OpenStack Networking - Third Edition

By: James Denton

Overview of this book

OpenStack Networking is a pluggable, scalable, and API-driven system to manage physical and virtual networking resources in an OpenStack-based cloud. Like other core OpenStack components, OpenStack Networking can be used by administrators and users to increase the value and maximize the use of existing datacenter resources. This third edition of Learning OpenStack Networking walks you through the installation of OpenStack and provides you with a foundation that can be used to build a scalable and production-ready OpenStack cloud. In the initial chapters, you will review the physical network requirements and architectures necessary for an OpenStack environment that provide core cloud functionality. Then, you’ll move through the installation of the new release of OpenStack using packages from the Ubuntu repository. An overview of Neutron networking foundational concepts, including networks, subnets, and ports will segue into advanced topics such as security groups, distributed virtual routers, virtual load balancers, and VLAN tagging within instances. By the end of this book, you will have built a network infrastructure for your cloud using OpenStack Neutron.
Table of Contents (16 chapters)

Configuring Neutron

Neutron uses default settings to determine the type of routers that users are allowed to create. In addition, the settings also specify the number of routers that make up a VRRP group, the default HA network CIDR, and the default network type.

The following settings are specified within the Neutron configuration file at /etc/neutron/neutron.conf, and only need to be modified on the host(s) running the Neutron API service. In this environment, the neutron-server service runs on the controller01 node:

# Enable HA mode for virtual routers. (boolean value)
#l3_ha = false
#
# Maximum number of L3 agents which a HA router will be scheduled
# on. If it is to 0 then the router will be scheduled on every
# agent. (integer value)
#max_l3_agents_per_router = 3
#
# Subnet used for the l3 HA admin network. (string value)
#l3_ha_net_cidr = 169.254.192.0/18
#
# The network type to use...