Printing access log to standard output

[suriya]

I apologize if what I am saying is wrong.

As far as I can tell, I don't see any easy way to print access logs to stdout. I see issue #1184. However, the fix does not seem to work. Invoking gunicorn without any arguments does no access logging. Invoking gunicorn --access-log - sends log messages to standard error (with gunicorn 19.6.0).

I someone could let me know how to get error messages logged to standard error and access logs to standard output, I'd appreciate it.

[tilgovi]

It does seem as thought --access-log - should probably mean stdout.

[benoitc]

It should be gunicorn --access-log=-. In theory it should be redireted to stdout:

https://github.com/benoitc/gunicorn/blob/master/gunicorn/glogging.py#L61-L77

If not, I will check what's missing.

[berkerpeksag]

Yes, the gunicorn.access logger should print to sys.stdout: https://github.com/benoitc/gunicorn/blame/master/gunicorn/glogging.py#L72 I think documentation is outdated: http://docs.gunicorn.org/en/stable/settings.html#accesslog

[tilgovi]

The documentation is not out of date, but the behavior seems a little broken. From the CONFIG_DEFAULTS that you link to, @berkerpeksag, it seems as though the intention is for access log to go to stdout. However, that is the default configuration that the --log-config setting merges into.

Without --log-config, the default for accesslog is None (from config.py) and so no handler is set up for the access log: https://github.com/benoitc/gunicorn/blob/master/gunicorn/glogging.py#L213

With --access-log -, we might expect to get stdout. The documentation correctly states that it means stderr, because that's the default for a StreamHandler as created by Logger._set_handler: https://docs.python.org/2/library/logging.handlers.html#logging.StreamHandler

[tilgovi]

I propose we change the handling of - for the access log setting to mean stdout.

[benoitc]

fixed in df84d3d . It was already defaulting to stdout by using the config file btw.

[suriya]

@benoitc Works as expected. Thank you so much!