本文为一整套安装流程#

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[root@master tmp]# mv kubernetes/server/bin/kube{adm,ctl,let} /usr/bin/
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[root@master tmp]# ls /usr/bin/kube*
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/usr/bin/kubeadm  /usr/bin/kubectl  /usr/bin/kubelet
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[root@master tmp]# kubeadm version
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kubeadm version: &version.Info{Major:"1", Minor:"11", GitVersion:"v1.11.3", GitCommit:"a4529464e4629c21224b3d52edfe0ea91b072862", GitTreeState:"clean", BuildDate:"2018-09-09T17:59:42Z", GoVersion:"go1.10.3", Compiler:"gc", Platform:"linux/amd64"}
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[root@master tmp]# kubectl version --client
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Client Version: version.Info{Major:"1", Minor:"11", GitVersion:"v1.11.3", GitCommit:"a4529464e4629c21224b3d52edfe0ea91b072862", GitTreeState:"clean", BuildDate:"2018-09-09T18:02:47Z", GoVersion:"go1.10.3", Compiler:"gc", Platform:"linux/amd64"}
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[root@master tmp]# kubelet --version
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Kubernetes v1.11.3

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[root@master tmp]# cat <<'EOF' > /etc/systemd/system/kubelet.service
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[Unit]
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Description=kubelet: The Kubernetes Agent
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Documentation=http://kubernetes.io/docs/
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[Service]
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ExecStart=/usr/bin/kubelet
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Restart=always
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StartLimitInterval=0
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RestartSec=10
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[Install]
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WantedBy=multi-user.target
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EOF
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[root@master tmp]# mkdir -p /etc/systemd/system/kubelet.service.d
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[root@master tmp]# cat <<'EOF' > /etc/systemd/system/kubelet.service.d/kubeadm.conf
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[Service]
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Environment="KUBELET_KUBECONFIG_ARGS=--bootstrap-kubeconfig=/etc/kubernetes/bootstrap-kubelet.conf --kubeconfig=/etc/kubernetes/kubelet.conf"
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Environment="KUBELET_CONFIG_ARGS=--config=/var/lib/kubelet/config.yaml"
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EnvironmentFile=-/var/lib/kubelet/kubeadm-flags.env
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EnvironmentFile=-/etc/default/kubelet
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ExecStart=
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ExecStart=/usr/bin/kubelet $KUBELET_KUBECONFIG_ARGS $KUBELET_CONFIG_ARGS $KUBELET_KUBEADM_ARGS $KUBELET_EXTRA_ARGS
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EOF
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[root@master tmp]# systemctl enable kubelet
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Created symlink from /etc/systemd/system/multi-user.target.wants/kubelet.service to /etc/systemd/system/kubelet.service.