Building Enterprise JavaScript Applications

kube-control-manager

As we will demonstrate later, a central concept of Kubernetes, and the reason why you'd use a Cluster Management Tool in the first place, is that you don't have to manually manipulate the cluster yourself.

Doing so will consist of sending a request to one component, receiving a response, and based on that response, sending another request to another component. This is the imperative approach, and is time-consuming because it requires you to manually write programs to implement this logic.

Instead, Kubernetes allows us to specify the desired state of our cluster using configuration files, and Kubernetes will automatically coordinate the different Kubernetes Components to make it happen. This is the declarative approach ...