docker dead but pid file exists 问题

You may have to enable the public_ol6_latest repo in order to get this package.

sudo yum-config-manager --enable public_ol6_latest

And then install the package:

sudo yum install device-mapper-event-libs

参考 http://stackoverflow.com/questions/27216473/docker-1-3-fails-to-start-on-rhel6-5