docker 提示permission denied

Got permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Get http://%2Fvar%2Frun%2Fdocker.sock/v1.26/containers/json: dial unix /var/run/docker.sock: connect: permission denied
表示权限不够，则修改权限可读写
su docker
sudo chmod a+rw /var/run/docker.sock