Summary

Kubernetes treats Pods as ephemeral entities, and ideally you would not deploy any application or a microservice in an individual Pod. Kubernetes offers various controllers to leverage various benefits, including automatic replication, health monitoring, and automatic scaling.

In this chapter, we covered different kinds of controllers and understood when to use each of them. We created ReplicaSets and observed how they manage Pods. We learned when to use DaemonSets and StatefulSets. We also created a Deployment and learned how we can scale up and down the number of replicas and roll back to an earlier version of the Deployment. Finally, we learned how to create Jobs for one-time tasks. All of these controllers come into play when you want to deploy a production-ready application or workload, as you will see in the upcoming chapters.

In the next chapter, we will see how we can discover and access the Pods or replicas managed by a Deployment or a ReplicaSet.