https://rancher.com/docs/k3s/latest/en/installation/install-options/
    #installing-k3s-from-the-binary

https://docs.k3s.io/advanced
    cri-dockerd by default
    https://github.com/Mirantis/cri-dockerd
    curl -sfL https://get.k3s.io | sh -s - --docker


https://www.rancher.co.jp/docs/k3s/latest/en/running/

curl -sfL https://get.k3s.io | sh -
curl -sfL https://get.k3s.io | INSTALL_K3S_VERSION=v0.3.0 INSTALL_K3S_EXEC="--write-kubeconfig-mode 644" sh -

INSTALL_K3S_EXEC=
    "--write-kubeconfig-mode 644"
    --disable-agent

# Check for Ready node, takes maybe 30 seconds
k3s kubectl get node

k3s.service
    k3s --version

sudo k3s server &
# Kubeconfig is written to /etc/rancher/k3s/k3s.yaml
sudo k3s kubectl get node

# On a different node run the below. NODE_TOKEN comes from /var/lib/rancher/k3s/server/node-token
# on your server
sudo k3s agent --server https://myserver:6443 --token ${NODE_TOKEN}

k3s

/usr/local/bin/
    k3s-kilall.sh
    k3s-uninstall.sh
    k3s
    crictl
    kubectl

echo "export node_token=$(sudo cat /var/lib/rancher/k3s/server/node-token)"
sudo /usr/local/bin/k3s agent --server https://<ip:port> --token "$node_token" >&k3s-agent.log &

2020
https://www.liquidweb.com/kb/how-to-install-and-configure-rancher-k3s/
2019
https://okteto.com/blog/lightweight-kubernetes-development-with-k3s-and-okteto/
    https://raw.githubusercontent.com/rancher/k3s/master/docker-compose.yml
????
https://collabnix.com/multi-node-k3s-cluster-on-nvidia-jetson-nano-in-5-minutes/
https://tutorials.keptn.sh/tutorials/keptn-installation-k3s-07/index.html?index=..%2F..keptn07x#2
    curl -sfL https://get.k3s.io | INSTALL_K3S_VERSION=v1.18.3+k3s1 K3S_KUBECONFIG_MODE="644" sh -s - --no-deploy=traefik