===== virtualenv service in systemd =====
Create a unit file:
<code>
sudo vim /etc/systemd/system/rapidsms.service
</code>

With this content (you may need change it):
<code>
[Unit]
Description=RapidSMS Virtualenv service
After=network.target

[Service]
User=emonge
Group=emonge
Environment=VIRTUAL_ENV=/home/emonge/smsbot-venv
Environment=PATH=$VIRTUAL_ENV/bin:$PATH
ExecStart=/bin/bash -c "cd /home/emonge/smsbot; $VIRTUAL_ENV/bin/python manage.py runserver 192.168.1.12:8000"
Restart=always

[Install]
WantedBy=multi-user.target
</code>

Make it executable:
<code>
sudo chmod 644 /lib/systemd/system/rapidsms.service
</code>

Reload systemd service:
<code>
sudo systemctl daemon-reload
</code>

Enable service to start during boot secuence:
<code>
sudo systemctl enable rapidsms.service
</code>

==== Log file ====
Modify the line starting with ExecStart in file /lib/systemd/system/rapidsms.service to:
<code>
ExecStart=/bin/bash -c "cd /home/emonge/smsbot; $VIRTUAL_ENV/bin/python manage.py runserver 192.168.1.12:8000 > /home/emonge/smsbot/smsbot.log 2>&1"
</code>

==== References ====
  * http://www.raspberrypi-spy.co.uk/2015/10/how-to-autorun-a-python-script-on-boot-using-systemd/
  * https://blog.philippklaus.de/2013/03/start-a-python-tool-or-web-app-that-uses-virtualenv-on-system-startup-using-systemd/
  * https://gist.github.com/danechitoaie/f2bb03fd0c2d6b803878