root@ecshop Deploy]# yum -y install docker-engine-selinux.noarch
Loaded plugins: fastestmirror
http://downloads-distro.mongodb.org/repo/redhat/os/x86_64/repodata/repomd.xml: [Errno 14] HTTP Error 500 - Internal Server Error
Trying other mirror.
Loading mirror speeds from cached hostfile
* base: mirror.neu.edu.cn
* epel: mirror.pregi.net
* extras: mirrors.aliyun.com
* updates: mirrors.aliyun.com
Resolving Dependencies
--> Running transaction check
---> Package docker-engine-selinux.noarch 0:1.11.1-1.el7.centos will be installed
--> Processing Conflict: docker-engine-selinux-1.11.1-1.el7.centos.noarch conflicts docker-selinux
--> Finished Dependency Resolution
Error: docker-engine-selinux conflicts with docker-selinux-1.9.1-25.el7.centos.x86_64
You could try using --skip-broken to work around the problem
You could try running: rpm -Va --nofiles --nodigest

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在stackoverflow上面看了一下，大概说的是你以前安装过了，先要把它给卸载了，就可以 了解决方法

[root@ecshop yum.repos.d]# rpm -qa|grep docker-engine-selinux.noarch 
[root@ecshop yum.repos.d]# rpm -qa|grep docker-engine-selinux
[root@ecshop yum.repos.d]# rpm -qa|grep docker
docker-selinux-1.9.1-25.el7.centos.x86_64
docker-registry-0.9.1-7.el7.x86_64
docker-forward-journald-1.9.1-25.el7.centos.x86_64
[root@ecshop yum.repos.d]# rpm -e docker-selinux
[root@ecshop yum.repos.d]# rpm -e docker-registry