k3s-cluster.sh

#!/bin/bash

sudo mkdir -p /etc/rancher/k3s/

nodeLabels=""

nvmeDisks=$(lsblk | grep sda)
[[ -n $nvmeDisks ]] && nodeLabels="--node-label storageNode=true"

hostname=$(hostname)

nodeRole="agent --token manag3m3ntClust3r"
if [[ "$hostname" =~ inode[1-3] ]]
then
  nodeRole="server "
  sudo cat << EOF | sudo tee /etc/rancher/k3s/config.yaml
write-kubeconfig-mode: "0644"
tls-san:
  - "k.m.lab.rathore.me"
  - "k8s.default.lab.rathore.me"
disable:
  - servicelb
  - local-storage
  - traefik
  - metrics-server
token: manag3m3ntClust3r
disable-network-policy: true
disable-kube-proxy: true
disable-cloud-controller: true
flannel-backend: none
EOF
fi

[ "$hostname" == "inode1" ] && curl -sfL https://get.k3s.io | sh -s - --cluster-init $nodeLabels
[ "$hostname" != "inode1" ] && curl -sfL https://get.k3s.io | sh -s - $nodeRole --server "https://inode1:6443" $nodeLabels