Supervisord switches to UNIX user account before any processing.
You need to specify what kind of user account it should use, run the daemon as root but specify user in the config file
Example:
[program:myprogram]
command=gunicorn --worker-class socketio.sgunicorn.GeventSocketIOWorker app.wsgi:application -b 127.0.0.1:8000
directory=/opt/myprogram
user=user1
autostart=true
autorestart=true
redirect_stderr=True
Visit http://supervisord.org/configuration.html#program-x-section-values for more information