uvicorn - access log format is not working

[meenraj]

the access log format below is not getting printed - and looks like uvicorn worker class is overriding the access log format

%(h)s %(l)s %(u)s %(t)s "%(r)s" %(s)s %(b)s %(D)s %({header}i)s

[lucifer-wsp]

I have the same issue, the log format not worked.

uvicorn = "0.13.4"
gunicorn = "^20.1.0"
django = "3.1.1"

and gunicorn.config.py :

access_log_format = '[host: %h|pid: %p|timestamp: %t](%H)s (%r)s (%m)s (%U)s referer (%f)s => response %(s)s %(b)s bytes %(D)s'

finally, i use the uvicorn access log and redirect stdout/err into gunicorn error log.

i config the settings like this to use uvicorn access log:

LOGGING = {
    'version': 1,
    'disable_existing_loggers': False,
    'formatters': {
        'uvicorn': {
            'format': '[%(asctime)s %(process)s] [%(levelname)s] %(message)s response time %(msecs)03d',  # NOQA
            'datefmt': "%d/%b/%Y %H:%M:%S",
        },
    },
    'handlers': {
        'uvicorn': {
            'level': 'DEBUG',
            'class': 'logging.handlers.RotatingFileHandler',
            'filename': UVICORN_LOG,
            'formatter': 'uvicorn',
        },
    },
    'loggers': {
        'uvicorn.access': {
            'handlers': ['console', 'uvicorn'],
            'level': 'DEBUG',
            'propagate': False,
        },
   },
},

and set error log and capture output in gunicorn.config.py.

errorlog = '/myproject/logs/gunicorn.log'
capture_output = True

Someone has a better idea ? Because i don't think that's a good way.

[Kludex]

uvicorn doesn't honor gunicorn's access_log_format yet.

We are working on it.

[pythonwood]

uvicorn doesn't honor gunicorn's access_log_format yet.

We are working on it.

@Kludex thank you !
what is the plan now ?

[Kludex]

There's nothing that Gunicorn can do, this should be solved on uvicorn's side.

You can follow this on: encode/uvicorn#527

Feel free to close this issue @benoitc 👀

[suhcrates-web]

I got the answer.
see that gunicorn anyway writes log records, and it follows certain default format. And such default format is configured in somwhere. Then, you can modify that config.
then, where is the default config? it is in the /sitepackages/gunicorn/glogging.py where the gunicorn is installed. it is the 'access_fmt' variable in the 'Logger' class.

[tilgovi]

Closing as this appears to be a downstream issue with uvicorn.

[waketzheng]

For people who using FastAPI, one solution is like this:

import logging
from contextlib import asynccontextmanager
from fastapi import FastAPI

LOG_FMT = "%(asctime)s - %(levelname)s - %(message)s"

def config_access_log_to_show_time():
    logger = logging.getLogger("uvicorn.access")
    handler = logging.StreamHandler()
    handler.setFormatter(logging.Formatter(LOG_FMT))
    logger.addHandler(handler)

@asynccontextmanager
async def lifespan(app: FastAPI):
    config_access_log_to_show_time()
    yield

app = FastAPI(lifespan=lifespan)

[bolee]

For people who using FastAPI, one solution is like this:

import logging
from contextlib import asynccontextmanager
from fastapi import FastAPI

LOG_FMT = "%(asctime)s - %(levelname)s - %(message)s"

def config_access_log_to_show_time():
    logger = logging.getLogger("uvicorn.access")
    handler = logging.StreamHandler()
    handler.setFormatter(logging.Formatter(LOG_FMT))
    logger.addHandler(handler)

@asynccontextmanager
async def lifespan(app: FastAPI):
    config_access_log_to_show_time()
    yield

app = FastAPI(lifespan=lifespan)

only for uvicorn ,but not woring gunicorn config.