redkubes / kubeadm

Instructions for creating K8s clusters using Kubeadm on Debian and RHEL based systems

Introduction

This repo contains instructions and code to setup a K8s cluster using Kubeadm on Debian and RHEL based systems. In the script you can set the required K8s version.

Procedure

1. Prepare Linux machines
2. Create K8s cluster using Kubeadm and install prerequisites
3. Install Otomi

Project structure

.
├── nodes    # Scripts to prepare master and worker node OS
    ├──debian
       ├──prep-master
       ├──prep-worker
    |__rhel
       ├──prep-master
       ├──prep-worker
├── kubeadm   # Scripts to create K8s cluster and install 
Calico, Metallb and Local-path provisioner and add worker nodes to the cluster.
    ├──master
    ├──node
|__ otomi    # Script to install Otomi

Notes

• Make sure the host names of the master(s) and workers are added to the /etc/hosts file
• After a restart, check if cri-docker.service docker services are up: systemctl status cri-docker.socket
• Make sure to set setenforce 0 after a reboot
• kubelet will be started when kubeadm init is done

sudo setenforce 0
sudo systemctl enable cri-docker.service
sudo systemctl enable --now cri-docker.socket
sudo systemctl restart kubelet