kubernetes下kubelet无法启动

错误如下：
09:58:45 kubernetes-node01 kubelet[6248]: F0124 09:58:45.902571 6248 server.go:265] failed to run Kubelet: misconfiguration: kubelet cgroup driver: "cgroupfs" is different from docker cgroup driver: "systemd"

1.docker info查看容器引擎是systemd
docker info
Storage Driver: overlay2
Backing Filesystem: extfs
Supports d_type: true
Native Overlay Diff: true
Logging Driver: json-file
Cgroup Driver: systemd
2.kubelet的引擎是cgroup，需修改与docker保持一致，修改kubelet的配置文件。修改cgroupDriver为systemd
pwd
/var/lib/kubelet
vim config.yaml
cgroupDriver: systemd
3.重启kubelet，服务已正常
systemctl restart kubelet
systemctl status kubelet