Exercises

In this chapter, we have covered Kubernetes and the clustering process in detail. In order to enhance this knowledge, we recommend the following exercises:

1. Run a hello world application on the Kubernetes cluster:
   1. The hello world application can look exactly the same as the one we described in the exercises for Chapter 2, Introducing Docker.
   2. Deploy the application with three replicas.
   3. Expose the application with the NodePort service.
   4. Make a request (using curl) to the application.
2. Implement a new feature, Goodbye World!, and deploy it using a rolling update:
   1. This feature can be added as a new endpoint, /bye, which always returns Goodbye World!.
   2. Rebuild a Docker image with a new version tag.
   3. Use the RollingUpdate strategy and readinessProbe.
   4. Observe the rolling update procedure.
   5. Make a request (using curl) to the application.