syslog unsupports rfc3164

[ezinall]

I tried to send logs to fluentd by syslog. Fleuntd shows me error:
2024-10-03 15:38:32 +0000 [error]: #0 invalid input data="<14>gunicorn.site.wsgi.application.access: [30] 10.0.0.2 - USER [03/Oct/2024:18:38:32 +0300] \"POST /api/blank/ HTTP/1.0\" 201 292 \"-\" \"Mozilla/5.0\"\x00" error_class=Fluent::TimeParser::TimeParseError error="invalid time format: value = gunicorn.site.wsgi.application.access: [30] 10.0.0.2, error_class = ArgumentError, error = string doesn't match"
I checked format of message and i have found mistake:

• this is exmaple from rfc3164
  <165>Aug 24 05:34:00 CST 1987 mymachine myproc[10]: %% It's time to make the do-nuts. %% Ingredients: Mix=OK, Jelly=OK # Devices: Mixer=OK, Jelly_Injector=OK, Frier=OK # Transport: Conveyer1=OK, Conveyer2=OK # %%
• this is example from fluend RFC-3164 Pattern
  <6>Feb 28 12:00:00 192.168.0.1 fluentd[11111]: [error] Hello!
• and this is gunicorn message
  <14>gunicorn.site.wsgi.application.access: [30] 10.0.0.2 - USER [03/Oct/2024:18:38:32 +0300] "POST /api/blank/ HTTP/1.0" 201 292 "-" "Mozilla/5.0"

There isn't time and should be gunicorn.site.wsgi.application.access[30]: i think.

There is solution for this problem? I suggest to add timestamp to syslog message and fix tag.
Result:
<14>Oct 03 18:38:32 gunicorn.site.wsgi.application.access[30]: 10.0.0.2 - USER [03/Oct/2024:18:38:32 +0300] "POST /api/blank/ HTTP/1.0" 201 292 "-" "Mozilla/5.0"

https://regex101.com/r/MhhzJ2/1

[pajod]

• dupe: Gunicorn default error logging date format is not standard ISO8601 #1771

RFC 3164 describes the (ridiculous) syslog format, but access log mimics (also ridiculous) w3c/apache httpd conventions.

Set your own --access-logformat if the non-standard time format works as long as it comes first, or extend gunicorn.glogging.Logger if not.

[ezinall]

At first access_fmt(access-logformat) and syslog_fmt has different value.
The problem is in the header of the syslog message format.
syslog_fmt = "[%(process)d] %(message)s" should be => syslog_fmt = "[%(process)d]: %(message)s"
https://github.com/benoitc/gunicorn/blob/master/gunicorn/glogging.py#L179
and
fmt = logging.Formatter(r"%s: %s" % (prefix, fmt)) should be => fmt = logging.Formatter(r"%s%s" % (prefix, fmt))
https://github.com/benoitc/gunicorn/blob/master/gunicorn/glogging.py#L440
Colon in the wrong place!

At second the flag of syslog header time is needed.