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. Preparation 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.
   • You can use corresponding package management tools (such as apt, yum) to install Docker according to different Linux distributions.

3. Install Kubernetes components:

   • Install the main components of Kubernetes on each node, including kubelet, kubeadm and kubectl.
   • You can use the package management tool or install it from the binary file officially provided by Kubernetes.

4. Initialize the master node:

   • Select a node as the master node (also called Master node), which will be used to control the entire cluster.
   • Run on the master node
     kubeadm init command to initialize the cluster. This command will generate a token to join the cluster.

5. Join working node:

   • Run on each worker node
     kubeadm join command adds the worker node to the cluster where the master node is located.
   • Run
     The join token generated during the kubeadm init command will be used to join the worker node to the cluster.

6. Configure network:

   • Install and configure network plugins so that containers within the cluster can communicate with each other.
   • Commonly used network plug-ins include Flannel, Calico, Weave, etc. You can choose the plug-in that suits your needs to install and configure.

7. Verification cluster:

   • Run
     kubectl get nodes command to verify whether the nodes in the cluster are running normally.
   • You should be able to see that the status of all nodes is displayed as "Ready".

Listed above are the basic steps to build a Kubernetes cluster. Depending on your needs and the characteristics of your environment, additional configuration and adjustments may be required. It is recommended to consult the official Kubernetes documentation and related tutorials for more detailed guidance and more configuration options.

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