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Python formatter for working with Logstash json filters.

Project description

Python logging formatter for creating log entries in a JSON logstash-friendly format.

Supports renaming of python default logging fields to logstash friendly names (e.g: renaming asctime to @timestamp)

LogstashFormatter can receive the following arguments:

  • fmt, list or tuple containing the fields to include in each entry. Defaults to [“asctime”, “levelname”, “filename”, “funcName”, “msg”, “exc_info”].
  • datefmt, date format string to be passed to formatTime(). Defaults to ISO8601 time format.
  • rename, dictionary containing mapping of { key: new_key } to be renamed. Defaults to { “asctime”: “@timestamp” }.
  • version, version as for the @version attribute used in Logstash. Defaults to “1”.

Sample output

{
  "@timestamp": "2016-09-28T16:24:24,799",
  "@version": "1",
  "exc_info": null,
  "filename": "<ipython-input-21-de248ad5b09c>",
  "funcName": "<module>",
  "levelname": "INFO",
  "message": "This is a normal message to be logged"
}

Usage

Add LogstashFormatter as the formatter of your handler, as usual:

self.logger = logging.getLogger()
self.handler = logging.StreamHandler()
self.handler.setFormatter(LogstashFormatter())
self.logger.addHandler(self.handler)

Using in Django

Include logstash formatter in your settings file:

LOGGING = {
    'formatters': {
        'logstash': {
            '()': 'logstash_formatter.LogstashFormatter',
            'format': ("asctime", "levelname", "name", "lineno", "message",
                       "pathname", "module", "funcName", "process",),
            'datefmt': '%Y-%m-%dT%H:%M:%S',
            'rename': {
                'asctime': '@timestamp',
            },
            'version': '1'
        },
    }
}

Project details


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