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)

Load Balancing Traffic to Instances

The Neutron load-balancing-as-a-service plugin, known as LBaaS v2, provides users with the ability to load balance traffic to applications running on virtual instances in the cloud. Neutron provides an API to manage load balancers, listeners, pools, members, and health monitors.

In this chapter, we will cover some fundamental load balancing concepts, including the following:

  • Listeners, pools, and pool members
  • Load balancing algorithms
  • Health Monitors
  • Session Persistence

Neutron uses drivers to interact with hardware or software load balancers. In Pike, the reference driver deploys HAProxy within network namespaces. HAProxy is a free, open source load balancer that is available for most Linux-based operating systems. Octavia is another open source load balancing solution that is compatible with the LBaaS v2 API. Rather than use network namespaces...