This shell script sets up a Kubernetes Master node on a physical machine running Ubuntu 22.04 LTS. It installs all required dependencies, configures the system, and initializes a Kubernetes cluster.

1. Download the Script

   • Save the script

2. Make it Executable

   • Run this command:

     chmod +x <file>.sh
     

3. Run the Script

   • Execute it with sudo:

     sudo ./<file>.sh
     

   • Follow the prompts to confirm or enter the Master node IP.

4. Check the Results

   • After completion, check the cluster status:

     kubectl get nodes
     

   • View the log file if there are issues:

     cat kubeadm_init.log
     

   • Find the Worker node join command:

     cat k8s-join-command.txt
     

• kubeadm_init.log: Log of the Kubernetes initialization process.
• k8s-join-command.txt: Command to join Worker nodes to the cluster.

• Kubernetes Version: Edit K8S_VERSION in the script (e.g., 1.29.2-1.1).
• Pod Network: Change POD_CIDR if needed (default is 10.244.0.0/16).

• If the IP detection fails, manually enter the correct IP when prompted.
• For hardware errors, ensure your machine meets the minimum requirements.