Cannot connect toxxx docker daemon running

Dec 22 14:50:27 master49 kubelet: F1222 14:50:27.123073   30898 server.go:274] failed to run Kubelet: failed to get docker version: Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?
Dec 22 14:50:27 master49 systemd: Unit kubelet.service entered failed state.
Dec 22 14:50:27 master49 systemd: kubelet.service failed.
^C
[root@master49 ~]# docker info
Client:
 Context:    default
 Debug Mode: false
 Plugins:
  app: Docker App (Docker Inc., v0.9.1-beta3)
  buildx: Build with BuildKit (Docker Inc., v0.5.0-docker)

Server:
ERROR: Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?
errors pretty printing info
[root@master49 ~]# service docker restart
Redirecting to /bin/systemctl restart docker.service
[root@master49 ~]# docker ps
CONTAINER ID   IMAGE     COMMAND   CREATED   STATUS    PORTS     NAMES
[root@master49 ~]# systemctl daemon-reload
[root@master49 ~]# service docker restart
Redirecting to /bin/systemctl restart docker.service
[root@master49 ~]# kubectl get node
NAME       STATUS   ROLES    AGE   VERSION
master49   Ready    master   28h   v1.18.2
master50   Ready    master   28h   v1.18.2
master56   Ready    master   28h   v1.18.2
node52     Ready    <none>   28h   v1.18.2
node53     Ready    <none>   28h   v1.18.2

我是修改过 /etc/docker/daemon.json 然后改好后出现的问题