install-k3s.sh

#!/bin/bash

# variables
export K3S_KUBECONFIG_MODE="666"

# install K3s
curl -sfL https://get.k3s.io | sh -s - \
  --disable-network-policy \
  --disable "servicelb" \
  --disable "traefik" \
  --disable "metrics-server"

# update k3s unit file to kill all subprocesses when stopping
sudo sed -i "s/KillMode=process/KillMode=mixed/g" /etc/systemd/system/k3s.service
sudo systemctl daemon-reload

# install MetalLB
k3s kubectl apply \
  -f https://raw.githubusercontent.com/metallb/metallb/v0.9.3/manifests/namespace.yaml \
  -f https://raw.githubusercontent.com/metallb/metallb/v0.9.3/manifests/metallb.yaml
k3s kubectl create secret generic -n metallb-system memberlist --from-literal=secretkey="$(openssl rand -base64 128)"
k3s kubectl apply -f - <<EOF
apiVersion: v1
kind: ConfigMap
metadata:
  namespace: metallb-system
  name: config
data:
  config: |
    address-pools:
    - name: default
      protocol: layer2
      addresses:
      - 10.44.0.2-10.44.255.254
EOF