Customizing JSON format

[kbakk]

Because our logging requirements differ from the JSON output of the default (JSONLogFormatter), it would be verify useful to be able to change it.

I initially tried with changing json_logging.JSON_SERIALIZER, however this (for example) doesn't give me option to change how the stack trace is formatted.

[bobbui]

Could you please let me know your JSON format requirement in more detail, we can work out a solution together.
Thanks

[kbakk]

We are working in my company to decide on what format to use - we currently have something like this

{
    "@timestamp": "2019-01-26T11:29:11.676573",
    "level": "ERROR",
    "message": "Nothing to see here",
    "caller": "test_json_logger.py::test_log_output_json",
    "data": {
        "python.logger_name": "tests.test_json_logger",
        "python.module": "test_json_logger",
        "python.funcName": "test_log_output_json",
        "python.filename": "test_json_logger.py",
        "python.lineno": 42,
        "python.thread": "MainThread[4576691648]",
        "python.pid": 3419,
        "divide_by": 0,
        "python.exc_info": "Traceback (most recent call last):\n  File \"/Users/kristofferb/Code/json-logging/tests/test_json_logger.py\", line 40, in test_log_output_json\n    1/0\nZeroDivisionError: division by zero\n"
    }
}

but the jury is still out.

I've submitted PR #14 - appreciate if you could take a look. It lets the user customize the logging format, and it is easy to modify it later if needed.