使用Flask和gunicorn进行JSON格式化日志记录

Question

我正在尝试做一些非常类似于此处解释的内容:https://sebest.github.io/post/protips-using-gunicorn-inside-a-docker-image/

我想让我的Flask app + gunicorn输出JSON格式的日志记录.我已经为Flask应用程序工作,但我似乎无法使用gunicorn.

这是我目前的输出:

 * Running on http://0.0.0.0:5000/ (Press CTRL+C to quit)
 * Restarting with stat
 * Debugger is active!
 * Debugger pin code: 317-187-130
192.168.99.1 - - [12/Jan/2016 20:09:29] "GET /nothing HTTP/1.1" 404 -
{"asctime": "2016-01-12 20:20:25,541", "levelname": "WARNING", "module": "app", "funcName": "err", "lineno": 17, "message": "will assert false..."}
192.168.99.1 - - [12/Jan/2016 20:20:25] "GET /err HTTP/1.1" 500 -

开始的行是正确记录为JSON {"asctime":的代码输出app.logger.warning('will assert false...').好极了.开头的行192.168.99.1是从我的gunicorn WSGI服务器输出的,令人沮丧的是,它们不是JSON格式的.

这是我用来启动gunicorn的命令:

gunicorn --log-config gunicorn_logging.conf -c gunicorn_config.py api.app:app

其中,gunicorn_logging.conf文件包含:

[loggers]
keys=root, gunicorn.error

[handlers]
keys=console

[formatters]
keys=json

[logger_root]
level=INFO
handlers=console

[logger_gunicorn.error]
level=ERROR
handlers=console
propagate=0
qualname=gunicorn.error

[handler_console]
class=StreamHandler
formatter=json
args=(sys.stdout, )

[formatter_json]
class=jsonlogging.JSONFormatter

并且文件gunicorn_config.py包含:

import os
import multiprocessing

addr = os.environ.get('HTTP_ADDR', '0.0.0.0')
port = os.environ.get('HTTP_PORT', '5000')
loglevel = os.environ.get('LOG_LEVEL', 'info')

bind = '{0}:{1}'.format(addr, port)
workers = multiprocessing.cpu_count() * 5 + 1
worker_class = 'gevent'
timeout = 0

这是输出pip freeze:

aniso8601==1.1.0
coverage==4.0.3
flake8==2.5.1
Flask==0.10.1
Flask-MySQLdb==0.2.0
Flask-RESTful==0.3.5
Flask-Script==2.0.5
gevent==1.1rc3
greenlet==0.4.9
gunicorn==19.4.5
itsdangerous==0.24
Jinja2==2.8
json-logging-py==0.2
MarkupSafe==0.23
marshmallow==2.4.2
mccabe==0.3.1
mysqlclient==1.3.7
nose==1.3.7
pep8==1.5.7
pyflakes==1.0.0
python-dateutil==2.4.2
python-json-logger==0.1.4
pytz==2015.7
six==1.10.0
SQLAlchemy==1.0.11
Werkzeug==0.11.3

Answer 1

获取访问日志以及配置文件应如下所示:

[loggers]
keys=root, gunicorn.error, gunicorn.access
...
[logger_gunicorn.access]
level=(DEBUG|INFO|ERROR)
handlers=console
propagate=0
qualname=gunicorn.access

访问记录在INFO日志级别,因此如果要显示它们,请确保将"logger_gunicorn.access"标记中的日志级别设置为至少INFO