Deploying the sample guestbook application step by step

In this chapter, you will deploy the classic guestbook sample Kubernetes application. You will be mostly following the steps from https://kubernetes.io/docs/tutorials/stateless-application/guestbook/ with some modifications. You will employ these modifications to show additional concepts, such as ConfigMaps, that are not present in the original sample.

The sample guestbook application is a simple, multi-tier web application. The different tiers in this application will have multiple instances. This is beneficial for both high availability and scalability. The guestbook's front end is a stateless application because the front end doesn't store any state. The Redis cluster in the back end is stateful as it stores all the guestbook entries.

You will be using this application as the basis for testing out the scaling of the back end and the front end, independently, in the next chapter.

Before we get started, let...