Kubernetes uses labels and annotations to attach metadata to various resources and objects. In this article, we see what resources, objects, labels and metadata are and how they work with each other, as well as other tools in a cluster.

Kubernetes manages the cluster using the master node or the control plane. The worker nodes are where the containerized applications are run.

Kubernetes (k8s) offers many solutions for containerized applications. We have a look at why it is so popular and how does it solve issues of operating large containerized applications.

We learn what Custom Resource Definitions (CRDs) are and then we create a simple CRD, it’s resource and a custom controller that logs a message and some data from the resource changes.

Kubernetes controllers are control loops that watch the state of your cluster and make changes where needed to achieve the desired state. We will dive into their significance, how to implement them and their various types.