initial commit

templates/k3s-master-service-env.j2

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+K3S_DATASTORE_ENDPOINT='{{ k3s_datastore_endpoint }}'
+K3S_KUBECONFIG_MODE='{{ k3s_kubeconfig_mode }}'
+K3S_TOKEN='{{ k3s_token }}'

templates/k3s-master-service.j2

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+[Unit]
+Description=Lightweight Kubernetes
+Documentation=https://k3s.io
+Wants=network-online.target
+After=network-online.target
+
+[Install]
+WantedBy=multi-user.target
+
+[Service]
+Type=notify
+EnvironmentFile=-/etc/default/%N
+EnvironmentFile=-/etc/sysconfig/%N
+EnvironmentFile=-/etc/systemd/system/k3s.service.env
+KillMode=process
+Delegate=yes
+# Having non-zero Limit*s causes performance problems due to accounting overhead
+# in the kernel. We recommend using cgroups to do container-local accounting.
+LimitNOFILE=1048576
+LimitNPROC=infinity
+LimitCORE=infinity
+TasksMax=infinity
+TimeoutStartSec=0
+Restart=always
+RestartSec=5s
+ExecStartPre=/bin/sh -xc '! /usr/bin/systemctl is-enabled --quiet nm-cloud-setup.service'
+ExecStartPre=-/sbin/modprobe br_netfilter
+ExecStartPre=-/sbin/modprobe overlay
+ExecStart={{ k3s_binary_dir }}/{{ k3s_binary_name }} \
+    server \
+        '--node-external-ip' \
+        '{{ ansible_host }}' \
+        '--flannel-backend=wireguard-native' \
+        '--cluster-cidr' \
+        '{{ k3s_cluster_cidr }}' \
+        '--service-cidr' \
+        '{{ k3s_service_cidr }}' \