Now which *host* is hosting a specific container is not defined in the
playbook yaml file but centrally in the invetory under the
`ansible_lxc_host` variable.

The `lxc_guest` role is runned directly against the guest, even if it
doesn't exist yet, and lxc tasks are delegated to the lxc-running
physical host.

In this way it should be easier to scale-up and configure multiple
istance of a service on different containers without changing the
playbook.

Look at `/ldap.yaml` for a commented example.

Now this connection can (also) be used directly indicating the LXC
container as the target (or delegated host), if the variables
`ansible_lxc_host` and `ansible_lxc_name` are provided, either in
invetory, role or task.

`ansible_lxc_host` is the inventory hostname of the LXC running physical
host.

`ansible_lxc_name` is the container name.

File `hosts.example` is provided to show how this variables can be set
up in an inventory.