Services are started trough systemd, which requires a priviledge container. Start it by:
''' docker run --privileged -ti --rm janfrode/xcat-centos-x86_64 '''
http://xcat-docs.readthedocs.io/en/stable/advanced/docker/dockerized_xcat/dockerized_xcat.html
For dockerized xCAT, there are 3 volumes recommended to save and restore xCAT user data.
"/install": save the osimage resources under “/install” directory
"/var/log/xcat/": save xCAT logs
"/.dbbackup": save and restore xCAT DB tables. You can save the xCAT DB tables with dumpxCATdb -p /.dbbackup/ inside container and xCAT will restore the tables on the container start up.