远程给docker容器执行命令（Docker命令让普通用户能够执行的实现）

sudo gpasswd -a ${USER} docker

sudo systemctl restart docker

sudo chmod a+rw /var/run/docker.sock

$ sudo usermod -aG docker $USER

[hsowan@localhost shell-workspace]$ docker run -it --rm ubuntu:14.04 bash
docker: Got permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Post http://%2Fvar%2Frun%2Fdocker.sock/v1.38/containers/create: dial unix /var/run/docker.sock: connect: permission denied.
See 'docker run --help'.

$ newgrp docker

$ sudo ll /var/run/docker.sock

srw-rw----. 1 root docker 0 Sep 22 15:29 /var/run/docker.sock

$ sudo chmod 666 /var/run/docker.sock

$ docker run -it --rm ubuntu:14.04 bash
root@5c60abab6425:/# cat /etc/os-release 
NAME="Ubuntu"
VERSION="14.04.5 LTS, Trusty Tahr"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 14.04.5 LTS"
VERSION_ID="14.04"
HOME_URL="http://www.ubuntu.com/"
SUPPORT_URL="http://help.ubuntu.com/"
BUG_REPORT_URL="http://bugs.launchpad.net/ubuntu/"
root@5c60abab6425:/# exit
exit