此处使用的是CentOS7，内核版本为
[root@localhost ~]# uname -r
3.10.0-327.el7.x86_64该版本下，配置了yum的源为阿里的镜像源，具体的配置方法可以参见阿里镜像源配置方法
为了方便的安装升级Docker，同时按照Docker官方文档中的方式，配置Docker的yum源，具体参见CentOS docker yum 源配置方法 https://docs.docker.com/v1.13/engine/installation/linux/centos/
配置好yum源之后，可以通过yum的list命令，获取可以安装的docker版本
[root@localhost ~]# yum list docker --showduplicates |sort -r
* updates: mirrors.aliyun.com
Loading mirror speeds from cached hostfile
Loaded plugins: fastestmirror, priorities
* extras: mirrors.aliyun.com
* epel: mirrors.aliyun.com
docker.x86_64 2:1.12.6-28.git1398f24.el7.centos extras
docker.x86_64 2:1.12.6-16.el7.centos extras
docker.x86_64 2:1.12.6-11.el7.centos extras
docker.x86_64 2:1.12.5-14.el7.centos extras
docker.x86_64 2:1.10.3-59.el7.centos extras
* base: mirrors.aliyun.com
Available Packages
[root@localhost ~]# yum list docker-engine.x86_64 --showduplicates |sort -r
* updates: mirrors.aliyun.com
Loading mirror speeds from cached hostfile
Loaded plugins: fastestmirror, priorities
Installed Packages
* extras: mirrors.aliyun.com
* epel: mirrors.aliyun.com
docker-engine.x86_64 1.9.1-1.el7.centos docker-main
docker-engine.x86_64 1.9.0-1.el7.centos docker-main
docker-engine.x86_64 1.8.3-1.el7.centos docker-main
docker-engine.x86_64 1.8.2-1.el7.centos docker-main
docker-engine.x86_64 1.8.1-1.el7.centos docker-main
docker-engine.x86_64 1.8.0-1.el7.centos docker-main
docker-engine.x86_64 1.7.1-1.el7.centos docker-main
docker-engine.x86_64 17.05.0.ce-1.el7.centos docker-main
docker-engine.x86_64 17.04.0.ce-1.el7.centos docker-main
docker-engine.x86_64 17.03.1.ce-1.el7.centos docker-main
docker-engine.x86_64 17.03.0.ce-1.el7.centos docker-main
docker-engine.x86_64 1.7.0-1.el7.centos docker-main
docker-engine.x86_64 1.13.1-1.el7.centos docker-main
docker-engine.x86_64 1.13.1-1.el7.centos @docker-main
docker-engine.x86_64 1.13.0-1.el7.centos docker-main
docker-engine.x86_64 1.12.6-1.el7.centos docker-main
docker-engine.x86_64 1.12.5-1.el7.centos docker-main
docker-engine.x86_64 1.12.4-1.el7.centos docker-main
docker-engine.x86_64 1.12.3-1.el7.centos docker-main
docker-engine.x86_64 1.12.2-1.el7.centos docker-main
