关于docker安装及权限的问题

[[email protected] tmp]# cat /etc/redhat-release
CentOS Linux release 7.4.1708 (Core)
[[email protected] tmp]# docker --version
Docker version 17.03.1-ce, build c6d412e

安装docker

yum install -y docker-ce-17.09.0.ce-1.el7.centos.x86_64.rpm
获取docker 包：
链接: https://pan.baidu.com/s/1bpbdHev 密码: cudc
安装完成功后，可能会提示你这样的信息:
If you would like to use Docker as a non-root user, you should now consider
adding your user to the "docker" group with something like:

usermod -aG docker ceshi
Remember that you will have to log out and back in for this to take effect!
ceshi 是你的用户名，可能你的用户名跟我的不一样。
意思就是说，你可以把当前用户加入到docker组，以后要管理docker就方便多了，不然你以后有可能要使用docker命令前，要在前面加sudo。

[[email protected] tmp]# usermod -aG docker ceshi
查看id情况：
[[email protected] ~]# id ceshiji
uid=1002(ceshiji) gid=1002(ceshiji) 组=1002(ceshiji),991(docker)
然后启动docker即可！
[[email protected] tmp]# systemctl start docker
[[email protected] tmp]# systemctl status docker