Kubernetes – Node

Nodes are working machines in Kubernetes clusters and are also known as minions. They can be physical, virtual, or cloud instances.

Pods are run on nodes using the proxy service, the kubelet service, and Docker, which runs Docker containers on the pods created on the node.

Cloud service providers or Kubernetes cluster managers create them externally on physical or virtual machines, not by Kubernetes.

To manage nodes, Kubernetes creates an object of kind node, which will test that the object created is a valid node. To manage nodes, Kubernetes creates an object of kind node, which runs multiple types of controllers.

Service with Selector

apiVersion: v1
kind: node
metadata:
   name: < ip address of the node>
   labels:
      name: <label name>

The actual object is created in JSON format and looks like this:

{
   Kind: node
   apiVersion: v1
   "metadata": 
   {
      "name": "10.01.1.10",
      "labels"
      {
         "name": "cluster 1 node"
      }
   }
}

Node Controller

These services run on the Kubernetes master and continuously monitor each node in the cluster based on metadata.name. The controller will assign a newly created pod to the node if all required services are running on the node. The master will not assign any pods to it if it is not valid, and will wait until it becomes valid.

If –register-node is true, Kubernetes master will register the node automatically.

–register-node = true

If the cluster administrator wants to manage it manually, he can turn the flat of −

–register-node = false