Schedule pod on Master node

In this video, we'll learn how to schedule a pod on the control plane / master node in Kubernetes using NodeSelector and Tolerations. The control plane node is a special node in the cluster that runs critical Kubernetes system components, such as the API server, scheduler, and controller manager.

First, we'll demonstrate how to create the deployment using imperative command using dry-run and use the yaml file to add the nodeselector and toleration to the pod definition file. This will ensure that the pod is scheduled on the control plane node.

We will check the labels assigned to the control plane node, this label will allow us to use NodeSelector to select the control plane node for scheduling the pod. We'll also show how to verify that the node has been labelled correctly.

Since the control plane node is typically tainted to prevent user workloads from being scheduled on it, we'll need to use Tolerations to allow the pod to be scheduled on the node despite the taint. We'll add a Tolerations field to the pod specification that matches the taint on the control plane node, thereby allowing the pod to be scheduled on the node.

Finally, we'll demonstrate how to create the pod and verify that it has been scheduled on the control plane node.

By the end of this video, you'll have a clear understanding of how to schedule a pod on the control plane node in Kubernetes using NodeSelector and Tolerations, which can be useful for running certain workloads that require access to the Kubernetes control plane.