ChattyRaspi script allows you to run arbitrary code on your machine by using Alexa interface.
pip install chattyraspi-script
$> chattyraspi-script \
--config-file devices_configuration.yaml \
--on-cmd "systemctl start openvpn.service" \
--off-cmd "systemctl stop openvpn.service" \
--is-on-cmd "systemctl status openvpn.service"