Teach you how to build a K8S cluster.

Building a Kubernetes (K8S) cluster usually involves multiple steps and component configurations. The following is a brief guide to setting up a Kubernetes cluster:

1. Prepare the environment:

   • At least two server nodes running the Linux operating system, these nodes will be used to build the cluster. These nodes can be physical servers or virtual machines.
   • Ensure network connectivity between all nodes and that they can reach each other.

2. Install Docker:

   • Install Docker on each node to be able to run containers on the node.
   • According to different Linux distributions, you can use corresponding package management tools (such as apt, yum) to install Docker.

3. Install Kubernetes components:

   • Install the main components of Kubernetes on each node, including kubelet, kubeadm, and kubectl.
   • It can be installed using package management tools or from official Kubernetes binaries.

4. Initialize the master node:

   • A node is selected as the master node (also known as the Master node), which will be used to control the entire cluster.
   • Run the command on the master node  kubeadm initto initialize the cluster. This command will generate a token to join the cluster.

5. Join the worker node:

   • Run the command on each worker node  kubeadm jointo join the worker node to the same cluster as the master node.
   • The join token generated when running  kubeadm initthe command will be used to join worker nodes to the cluster.

6. Configure network:

   • Install and configure the networking plugin so that containers within the cluster can communicate with each other.
   • Commonly used network plug-ins include Flannel, Calico, Weave, etc. You can choose a plug-in that suits your needs for installation and configuration.

7. Verify cluster:

   • Run  kubectl get nodesthe command to verify that the nodes in the cluster are healthy.
   • You should be able to see the status of all nodes as "Ready".

The above are just the basic steps to build a Kubernetes cluster. Depending on your needs and specific environment, additional configuration and tuning may be required. You can refer to the official Kubernetes documentation and related tutorials for more detailed guidance and more advanced configuration options.