The docker service fails to start: # systemctl start docker.service Failed to start docker.service: Unit not found. This is because docker.service has a dependency on a non-existent unit: [Unit] ... Requires=rhel-push-plugin.socket The centos 7 extras package has removed it, as well as '--authorization-plugin=rhel-push-plugin'. See the c7-extras branch of https://git.centos.org/summary/rpms!docker for any other changes. -- Orion Poplawski Technical Manager 720-772-5637 NWRA, Boulder/CoRA Office FAX: 303-415-9702 3380 Mitchell Lane [log in to unmask] Boulder, CO 80301 http://www.nwra.com