descargar ficheros de: https://cbs.centos.org/koji/buildinfo?buildID=19359
sudo yum install \ docker-1.12.6-54.gitc4618fb.el7.x86_64.rpm \ docker-client-1.12.6-54.gitc4618fb.el7.x86_64.rpm \ docker-common-1.12.6-54.gitc4618fb.el7.x86_64.rpm \ oci-umount-1.12.6-54.gitc4618fb.el7.x86_64.rpm \ docker-rhel-push-plugin-1.12.6-54.gitc4618fb.el7.x86_64.rpm