Kubernetes components

Hello reader, Jorge here. I’ll be starting a series of articles about Kubernetes since I’m studying for the CKAD exam.

In this post I will be talking about the components that make up a Kubernetes cluster. I will be using the following diagram to explain the building blocks:

The diagram above shows the components that make up a Kubernetes cluster. The components are divided into two groups:

• The control plane: Manages the worker nodes and the Pods in the cluster. Additionally, it makes components make global decisions about the cluster (for example, scheduling), as well as detecting and responding to cluster events (for example, starting up a new pod when a deployment’s replicas field is unsatisfied).
• The worker nodes: The actual machines running your contasinerized applications (for example, Pods). The worker nodes may be VMs or physical machines, depending on your cluster. Each node has the services necessary to run Pods and is managed by the control plane.

As we see on the previous diagram, we can see that the control plane is made up of the following components: