WEBVTT

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Hello and welcome to this lecture. In this lecture

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we will look at kubelet.

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Earlier we discussed that the kubelet is like the captain on the ship. They lead all activities on

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a ship.

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They're the ones responsible for doing all the paperwork necessary to become part of the cluster,

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They're the sole point of contact from the master ship.

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They load or unload containers on the ship as instructed by the scheduler on the master.

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They also send back reports at regular intervals on the status of the ship and the containers on them.

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The kubelet in the kubernetes worker node, registers the node with the kubernetes cluster.

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When it receives instructions to load a container or a POD on the node, it requests the container run time

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engine, which may be Docker, to pull the required image and run an instance.

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The kubelet then continues to monitor the state of the POD and the containers in it and reports to the kube-api

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server on a timely basis.

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So how do you install the kubelet? If you use kubeadm tool to deploy your cluster, it  does not

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automatically deploy the kubelet.

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Now that's the difference from the other components.

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You must always manually install the kubelet on your worker nodes. Download the installer, extract

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it and run it as a service.

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You can view the running kubelet process and the effective options by listing the process on the worker

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node and searching for kubelet.

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We will look more into kubelets, how to configure kubelets, generate certificates, and finally how

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to TLS bootstrap kubelets later in this course.

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That's it for now.

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Will see you in the next lecture.