使用 systemctl status kubelet 查看 如下：

● kubelet.service - kubelet: The Kubernetes Node Agent
Loaded: loaded (/lib/systemd/system/kubelet.service; enabled; vendor preset: disabled)
Active: activating (auto-restart) (Result: exit-code) since Fri 2020-05-08 11:20:34 CST; 8s ago
Docs: https://kubernetes.io/docs/home/
Process: 14923 ExecStart=/usr/bin/kubelet (code=exited, status=255/EXCEPTION)
Main PID: 14923 (code=exited, status=255/EXCEPTION)

journalctl _PID=14923 | vim - 如下

有一行 failed to run Kubelet: misconfiguration: kubelet cgroup driver: "cgroupfs" is different from docker cgroup driver: "systemd"