【kubectl】The connection to the server localhost:8080 was refused - did you specify the right host or

1. Server

2. Agent
   

3. journalctl -xefu kubelet

failed to run Kubelet: failed to create kubelet: misconfiguration: kubelet cgroup driver: "systemd" is different from docker cgroup driver: "cgroupfs"

4. docker info
   

5. vi /etc/docker/daemon.json
   添加一行：
   “exec-opts”: [“native.cgroupdriver=systemd”],

6. 重启docker
   systemctl daemon-reload
   systemctl restart docker