Chapter 10. Networking
This chapter covers
- Designing cluster networks
- Understanding network traffic flow in OpenShift
- Configuring Open vSwitch
- Configuring OpenShift network plugins
- Using DNS in OpenShift
The importance of the networking configuration in an OpenShift cluster can’t be overstated; it’s the fabric that binds your cluster together. With that perspective, OpenShift does a lot of work to make sure its networking configuration is stable, performs well, and is highly configurable. Those principles are what we’ll cover in this chapter. Let’s start with an overview of how the network in OpenShift is designed.
Up to this point, all your OpenShift applications have run on a single application node. It’s time to fix that. Section A.8 in appendix A walks through the steps to provision a third server and add it to your OpenShift cluster as an application node. Go ahead and use that walkthrough to scale your cluster with an additional application node. When you’re finished, your cluster will consist of a single master server and two application nodes.