参照初始化主节点时，给出的命令，将工作节点连接到主节点：
kubeadm join 192.168.31.174:6443 --token wzhn5s.lh9ahv8y4f59ie2t \
--discovery-token-ca-cert-hash sha256:7bf1f8c25fcef4aec3f55e463ac89cf42de43dccacf5fab940a597f0975af492
输出
...
[kubelet-start] Downloading configuration for the kubelet from the "kubelet-config-1.16" ConfigMap in the kube-system namespace
[kubelet-start] Writing kubelet configuration to file "/var/lib/kubelet/config.yaml"
[kubelet-start] Writing kubelet environment file with flags to file "/var/lib/kubelet/kubeadm-flags.env"
[kubelet-start] Activating the kubelet service
[kubelet-start] Waiting for the kubelet to perform the TLS Bootstrap...
This node has joined the cluster:
* Certificate signing request was sent to apiserver and a response was received.
* The Kubelet was informed of the new secure connection details.
Run 'kubectl get nodes' on the control-plane to see this node join the cluster.
在主节点执行kubectl get nodes，验证工作节点是否加入：
[root@qikegu-centos5 ~]# kubectl get nodes
NAME STATUS ROLES AGE VERSION
qikegu-centos5 Ready master 6h10m v1.16.2
qikegu-knode1 Ready <none> 4m3s v1.16.2
可以看到工作节点qikegu-knode1已经连接到主节点了，主节点和工作节点都处于就绪状态。
类似地，另外一个节点qikegu-knode2，可以按照同样方式安装。
至此，我们已经成功安装Kubernetes，接下来就可以使用Kubernetes了。