yum安装Docker报错file /usr/lib/systemd/system

前该报错也遇到过，没有记录到网站，今天记录下。
今天闲着没事从一个centos 7.0的linux虚拟机上也安装了一个Docker测试耍耍，结果报错如下：

Transaction check error:
  file /usr/lib/systemd/system/blk-availability.service from install of device-mapper-7:1.02.107-5.el7_2.5.x86_64 conflicts with file from package lvm2-7:2.02.105-14.el7.x86_64
  file /usr/sbin/blkdeactivate from install of device-mapper-7:1.02.107-5.el7_2.5.x86_64 conflicts with file from package lvm2-7:2.02.105-14.el7.x86_64
  file /usr/share/man/man8/blkdeactivate.8.gz from install of device-mapper-7:1.02.107-5.el7_2.5.x86_64 conflicts with file from package lvm2-7:2.02.105-14.el7.x86_64
 
解决办法：

yum install lvm2 docker-io -y
重新yum安装docker，问题解决。