Define a basic but working complete k3s-kubernetes setup

modules/hetzner/kubernetes/server-init.yaml.tftpl

@@ -0,0 +1,29 @@
+#cloud-config
+packages:
+- curl
+users:
+- name: cluster
+  shell: /bin/bash
+runcmd:
+# update system dependency-lists
+- apt-get update -y
+# configure NAT
+- echo '#!/bin/bash' > /etc/networkd-dispatcher/routable.d/10-eth0-post-up
+- echo 'echo 1 > /proc/sys/net/ipv4/ip_forward' >> /etc/networkd-dispatcher/routable.d/10-eth0-post-up
+- echo 'iptables -t nat -A POSTROUTING -s ${network_ip_range} -o eth0 -j MASQUERADE' >> /etc/networkd-dispatcher/routable.d/10-eth0-post-up
+- chmod +x /etc/networkd-dispatcher/routable.d/10-eth0-post-up
+- /etc/networkd-dispatcher/routable.d/10-eth0-post-up
+# install k3s but do not start yet
+- curl -sfL https://get.k3s.io | tee install-k3s | INSTALL_K3S_SKIP_ENABLE=true sh -s -
+%{ if first_ip != "" ~}
+- until curl -k https://${first_ip}:6443; do sleep 5; done
+%{ endif ~}
+# Enable and start k3s-server
+%{ if first_ip == "" ~}
+- cat install-k3s | K3S_TOKEN=${k3s_token} sh -s - server --cluster-init
+%{~ else ~}
+- cat install-k3s | INSTALL_K3S_SKIP_DOWNLOAD=true K3S_TOKEN=${k3s_token} sh -s - server --server https://${first_ip}:6443
+%{~ endif }
+- chown cluster:cluster /etc/rancher/k3s/k3s.yaml
+- chown cluster:cluster /var/lib/rancher/k3s/server
+- chown cluster:cluster /var/lib/rancher/k3s/server/node-token