关闭服务：

systemctl stop docker.service
systemctl stop docker.socket

修改/usr/lib/systemd/system/docker.socket文件：

[Socket]
ListenStream=/var/run/dockershim.sock

重新加载配置：

systemctl daemon-reload

启动服务：

systemctl start docker.socket
systemctl start docker.service

修改环境变量，在/etc/profile中添加：

export DOCKER_HOST="unix:///var/run/dockershim.sock"

如果不修改环境变量，执行docker命令时会报错无法连接上docker，因为socket路径不对：

Client:
 Context:    default
 Debug Mode: false
 Plugins:
  app: Docker App (Docker Inc., v0.9.1-beta3)
  buildx: Build with BuildKit (Docker Inc., v0.5.1-docker)
  scan: Docker Scan (Docker Inc., v0.8.0)

Server:
ERROR: Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?
errors pretty printing info