supervisord logs don't show my output

Question

I have a [program:x] running and it prints / sys.stdout.writes a lot of things. None of which comes up in either in the AUTO childlogdir of [supervisord] or in stdout_logfile of [program:x] Am I missing something?

How do I capture all that is printed or stdout-ed from [program:x] ?

In my program I am explicitly doing both,

print "something" sys.stdout.write("something")  

Relevant supervisord.conf file

[supervisord] childlogdir = %(here)s/../logs/supervisord/ logfile = %(here)s/../logs/supervisord/supervisord.log logfile_maxbytes = 100MB logfile_backups = 10 loglevel = info pidfile = %(here)s/../logs/supervisord/supervisord.pid umask = 022 nodaemon = false nocleanup = false  [program:x] directory = %(here)s/../ command = python file.py autostart=true autorestart=true redirect_stderr=true   stdout_logfile = /appropriate-path/to/access.log 

Answer 1

Python output is buffered. Setting the environment variable PYTHONUNBUFFERED=1 in you supervisord.conf will disable buffering and show log messages sooner:

[program:x] environment = PYTHONUNBUFFERED=1 

or add the -u command-line switch to python command:

[program:x] command = python -u file.py 

Alternatively you can flush the sys.stdout handler explicitly:

sys.stdout.flush() 

On python 3.3 and up, you can add the flush=True parameter to have the function do this for you:

print(something, flush=True) 

Answer 2

You can run your program like this:

python -u file.py 

this will produce unbuffered output