After the k8s cluster restarts, kubelet starts to solve the error

1 k8s version 1.23.0, docker CE version 20.10.14

2. An error is reported for the problem, and an error is reported for starting kubelet. The contents are as follows:

May 16 09:47:13 k8s-master kubelet: E0516 09:47:13.512956    7403 server.go:302] "Failed to run kubelet" err="failed to run Kubelet: misconfiguration: kubelet cgroup driver: \"systemd\" is different from docker cgroup driver: \"cgroupfs\""
May 16 09:47:13 k8s-master systemd: kubelet.service: main process exited, code=exited, status=1/FAILURE
May 16 09:47:13 k8s-master systemd: Unit kubelet.service entered failed state.
May 16 09:47:13 k8s-master systemd: kubelet.service failed

3 problem analysis: according to the error report, the reason should be that kubelet’s cgroups are inconsistent with docker

4. Solve the problem and modify the docker configuration

cat > /etc/docker/daemon.json <<EOF
{"exec-opts": ["native.cgroupdriver=systemd"]}
EOF

5. Restart docker to solve the problem

[root@k8s-master ~]# systemctl restart docker
[root@k8s-master ~]# systemctl restart kubelet
[root@k8s-master ~]# 
[root@k8s-master ~]# systemctl status  kubelet
● kubelet.service - kubelet: The Kubernetes Node Agent
   Loaded: loaded (/usr/lib/systemd/system/kubelet.service; enabled; vendor preset: disabled)
  Drop-In: /usr/lib/systemd/system/kubelet.service.d
           └─10-kubeadm.conf
   Active: active (running) since Mon 2022-05-16 09:48:06 CST; 3s ago
     Docs: https://kubernetes.io/docs/
 Main PID: 8226 (kubelet)
    Tasks: 23
   Memory: 56.9M
   CGroup: /system.slice/kubelet.service
           ├─8226 /usr/bin/kubelet --bootstrap-kubeconfig=/etc/kubernetes/bootstrap-kubelet.conf --kubeconfig=/etc/kubernetes/kubelet.conf --config...
           └─8745 /opt/cni/bin/calico