celery -A main:celery_app beat --logfile=/var/log/celery/celerybeat.log

stream = open(self.baseFilename, self.mode)
IOError: [Errno 13] Permission denied: '/var/log/celery/celerybeat.log

-rw-rw-r-- 1 celery celery 0 Jan 12 14:18 /var/log/celery/celerybeat.log