I am trying to run Docker on a CentOS 7 VPS by following this guide here: https://openvz.org/Docker_inside_CT
My host indicates they have performed all the steps prior to installing docker-io. I have docker-io installed and running, but when I try to run the hello-world container to see if its working I get this:
docker: Error response from daemon: Cannot start container 0bd719fe7bc05971ddd43f9c1c0c2f71a74c6bcc58cac74501e80890ecebb313:  System error: write /sys/fs/cgroup/freezer,devices/system.slice/docker-0bd719fe7bc05971ddd43f9c1c0c2f71a74c6bcc58cac74501e80890ecebb313.scope/devices.allow: operation not permitted.
I am new to docker so any input would be appreciated. If I need to take this issue elsewhere just let me know.