kubespray/roles/kubernetes/node/templates/kubelet.service.j2

[Unit]
Description=Kubernetes Kubelet Server
Documentation=https://github.com/GoogleCloudPlatform/kubernetes
{% if kube_network_plugin is defined and kube_network_plugin == "calico" %}
After=docker.service calico-node.service
{% else %}
After=docker.service
{% endif %}

[Service]
EnvironmentFile=/etc/kubernetes/kubelet.env
ExecStart={{ bin_dir }}/kubelet \
		$KUBE_LOGTOSTDERR \
		$KUBE_LOG_LEVEL \
		$KUBELET_API_SERVER \
		$KUBELET_ADDRESS \
		$KUBELET_PORT \
		$KUBELET_HOSTNAME \
		$KUBE_ALLOW_PRIV \
		$KUBELET_ARGS \
		$DOCKER_SOCKET \
		$KUBELET_REGISTER_NODE \
		$KUBELET_NETWORK_PLUGIN \
		$KUBELET_CLOUDPROVIDER
Restart=on-failure

[Install]
WantedBy=multi-user.target