Warning, this charm will require access to ``/var/run/docker.sock``,
and this IS EQUIVALENT to root access to host.

Warning, must use ``/etc/cron`` and not ``/etc/cron.d``.


docker was downloaded with:

wget https://get.docker.com/builds/Linux/x86_64/docker-1.9.1


It changed, check:

  https://download.docker.com/linux/static/stable/x86_64/