IOError: [Errno 13] Permission denied: '/var/log/supervisor/supervisord.log'
/usr/lib/python2.7/dist-packages/supervisor/options.py:298: UserWarning: Supervisord is running as root and it is searching for its configuration file in default locations (including its current working directory); you probably want to specify a "-c" argument specifying an absolute path to a configuration file for improved security.
  'Supervisord is running as root and it is searching '
Traceback (most recent call last):
  File "/usr/bin/supervisord", line 11, in <module>
    load_entry_point('supervisor==3.3.1', 'console_scripts', 'supervisord')()
  File "/usr/lib/python2.7/dist-packages/supervisor/supervisord.py", line 365, in main
    go(options)
  File "/usr/lib/python2.7/dist-packages/supervisor/supervisord.py", line 375, in go
    d.main()
  File "/usr/lib/python2.7/dist-packages/supervisor/supervisord.py", line 78, in main
    info_messages)
  File "/usr/lib/python2.7/dist-packages/supervisor/options.py", line 1398, in make_logger
    stdout = self.nodaemon,
  File "/usr/lib/python2.7/dist-packages/supervisor/loggers.py", line 346, in getLogger
    handlers.append(RotatingFileHandler(filename,'a',maxbytes,backups))
  File "/usr/lib/python2.7/dist-packages/supervisor/loggers.py", line 172, in __init__
    FileHandler.__init__(self, filename, mode)
  File "/usr/lib/python2.7/dist-packages/supervisor/loggers.py", line 98, in __init__
    self.stream = open(filename, mode)
IOError: [Errno 13] Permission denied: '/var/log/supervisor/supervisord.log'