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

[Unit]
Description=Kubernetes Kubelet Server
Documentation=https://github.com/GoogleCloudPlatform/kubernetes
After={{ container_manager }}.service
{% if container_manager == 'docker' %}
Wants=docker.socket
{% else %}
Wants={{ container_manager }}.service
{% endif %}

[Service]
User=root
EnvironmentFile=-{{ kube_config_dir }}/kubelet.env
ExecStart={{ bin_dir }}/kubelet \
		$KUBE_LOGTOSTDERR \
		$KUBE_LOG_LEVEL \
		$KUBELET_API_SERVER \
		$KUBELET_ADDRESS \
		$KUBELET_PORT \
		$KUBELET_HOSTNAME \
		$KUBELET_ARGS \
		$DOCKER_SOCKET \
		$KUBELET_NETWORK_PLUGIN \
		$KUBELET_VOLUME_PLUGIN \
		$KUBELET_CLOUDPROVIDER
Restart=always
RestartSec=10s

[Install]
WantedBy=multi-user.target