alright, everybody writen one about this but nothing worked for me, here's how it works without any problem:
first run yum install supervisor
supervisor searches for configuration file in following paths: /usr/local/etc/supervisord.conf, /usr/local/supervisord.conf, supervisord.conf, etc/supervisord.conf, /etc/supervisord.conf, /etc/supervisor/supervisord.conf
we have to create one in order for it to work: