docker出现Got permission denied while trying to connect to the Docker daemon socket的异常--解决方法

Got permission denied while trying to connect to the Docker daemon socket
at unix:///var/run/docker.sock: Get http://%2Fvar%2Frun%2Fdocker.sock/v1.37/containers/json: 
dial unix /var/run/docker.sock: connect: permission denied

docker解决方法

1.创建group组
sudo groupadd docker

2.添加当前用户用户到docker组
sudo gpasswd -a ${USER} docker

3.重启 docker服务
sudo service docker restart

4.切换会话,避免使用缓存的组信息
newgrp - docker