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Name: graypy
Version: 2.1.0
Summary: Python logging handlers that send messages in the Graylog Extended Log Format (GELF).
Home-page: https://github.com/severb/graypy
Author: Sever Banesiu
Author-email: banesiu.sever@gmail.com
License: BSD License
Keywords: logging gelf graylog2 graylog udp amqp
Platform: UNKNOWN
Classifier: License :: OSI Approved :: BSD License
Classifier: Intended Audience :: Developers
Classifier: Programming Language :: Python
Classifier: Programming Language :: Python :: 2
Classifier: Programming Language :: Python :: 2.7
Classifier: Programming Language :: Python :: 3
Classifier: Programming Language :: Python :: 3.2
Classifier: Programming Language :: Python :: 3.3
Classifier: Programming Language :: Python :: 3.4
Classifier: Programming Language :: Python :: 3.5
Classifier: Programming Language :: Python :: 3.6
Classifier: Programming Language :: Python :: 3.7
Classifier: Programming Language :: Python :: Implementation :: CPython
Classifier: Programming Language :: Python :: Implementation :: PyPy
Classifier: Topic :: System :: Logging
Description-Content-Type: text/x-rst
Provides-Extra: amqp
Requires-Dist: amqplib (==1.0.2) ; extra == 'amqp'
Provides-Extra: docs
Requires-Dist: sphinx (<3.0.0,>=2.1.2) ; extra == 'docs'
Requires-Dist: sphinx-rtd-theme (<1.0.0,>=0.4.3) ; extra == 'docs'
Requires-Dist: sphinx-autodoc-typehints (<2.0.0,>=1.6.0) ; extra == 'docs'
######
graypy
######
.. image:: https://img.shields.io/pypi/v/graypy.svg
:target: https://pypi.python.org/pypi/graypy
:alt: PyPI Status
.. image:: https://travis-ci.org/severb/graypy.svg?branch=master
:target: https://travis-ci.org/severb/graypy
:alt: Build Status
.. image:: https://readthedocs.org/projects/graypy/badge/?version=stable
:target: https://graypy.readthedocs.io/en/stable/?badge=stable
:alt: Documentation Status
.. image:: https://codecov.io/gh/severb/graypy/branch/master/graph/badge.svg
:target: https://codecov.io/gh/severb/graypy
:alt: Coverage Status
Description
===========
Python logging handlers that send log messages in the
Graylog Extended Log Format (GELF_).
graypy supports sending GELF logs to both Graylog2 and Graylog3 servers.
Installing
==========
Using pip
---------
Install the basic graypy python logging handlers:
.. code-block:: console
pip install graypy
Install with requirements for ``GELFRabbitHandler``:
.. code-block:: console
pip install graypy[amqp]
Using easy_install
------------------
Install the basic graypy python logging handlers:
.. code-block:: console
easy_install graypy
Install with requirements for ``GELFRabbitHandler``:
.. code-block:: console
easy_install graypy[amqp]
Usage
=====
graypy sends GELF logs to a Graylog server via subclasses of the python
`logging.Handler`_ class.
Below is the list of ready to run GELF logging handlers defined by graypy:
* ``GELFUDPHandler`` - UDP log forwarding
* ``GELFTCPHandler`` - TCP log forwarding
* ``GELFTLSHandler`` - TCP log forwarding with TLS support
* ``GELFHTTPHandler`` - HTTP log forwarding
* ``GELFRabbitHandler`` - RabbitMQ log forwarding
UDP Logging
-----------
UDP Log forwarding to a locally hosted Graylog server can be easily done with
the ``GELFUDPHandler``:
.. code-block:: python
import logging
import graypy
my_logger = logging.getLogger('test_logger')
my_logger.setLevel(logging.DEBUG)
handler = graypy.GELFUDPHandler('localhost', 12201)
my_logger.addHandler(handler)
my_logger.debug('Hello Graylog.')
UDP GELF Chunkers
^^^^^^^^^^^^^^^^^
`GELF UDP Chunking`_ is supported by the ``GELFUDPHandler`` and is defined by
the ``gelf_chunker`` argument within its constructor. By default the
``GELFWarningChunker`` is used, thus, GELF messages that chunk overflow
(i.e. consisting of more than 128 chunks) will issue a
``GELFChunkOverflowWarning`` and **will be dropped**.
Other ``gelf_chunker`` options are also available:
* ``BaseGELFChunker`` silently drops GELF messages that chunk overflow
* ``GELFTruncatingChunker`` issues a ``GELFChunkOverflowWarning`` and
simplifies and truncates GELF messages that chunk overflow in a attempt
to send some content to Graylog. If this process fails to prevent
another chunk overflow a ``GELFTruncationFailureWarning`` is issued.
RabbitMQ Logging
----------------
Alternately, use ``GELFRabbitHandler`` to send messages to RabbitMQ and
configure your Graylog server to consume messages via AMQP. This prevents log
messages from being lost due to dropped UDP packets (``GELFUDPHandler`` sends
messages to Graylog using UDP). You will need to configure RabbitMQ with a
``gelf_log`` queue and bind it to the ``logging.gelf`` exchange so messages
are properly routed to a queue that can be consumed by Graylog (the queue and
exchange names may be customized to your liking).
.. code-block:: python
import logging
import graypy
my_logger = logging.getLogger('test_logger')
my_logger.setLevel(logging.DEBUG)
handler = graypy.GELFRabbitHandler('amqp://guest:guest@localhost/', exchange='logging.gelf')
my_logger.addHandler(handler)
my_logger.debug('Hello Graylog.')
Django Logging
--------------
It's easy to integrate ``graypy`` with Django's logging settings. Just add a
new handler in your ``settings.py``:
.. code-block:: python
LOGGING = {
'version': 1,
# other dictConfig keys here...
'handlers': {
'graypy': {
'level': 'WARNING',
'class': 'graypy.GELFUDPHandler',
'host': 'localhost',
'port': 12201,
},
},
'loggers': {
'django.request': {
'handlers': ['graypy'],
'level': 'ERROR',
'propagate': True,
},
},
}
Traceback Logging
-----------------
By default log captured exception tracebacks are added to the GELF log as
``full_message`` fields:
.. code-block:: python
import logging
import graypy
my_logger = logging.getLogger('test_logger')
my_logger.setLevel(logging.DEBUG)
handler = graypy.GELFUDPHandler('localhost', 12201)
my_logger.addHandler(handler)
try:
puff_the_magic_dragon()
except NameError:
my_logger.debug('No dragons here.', exc_info=1)
Default Logging Fields
----------------------
By default a number of debugging logging fields are automatically added to the
GELF log if available:
* function
* pid
* process_name
* thread_name
You can disable automatically adding these debugging logging fields by
specifying ``debugging_fields=False`` in the handler's constructor:
.. code-block:: python
handler = graypy.GELFUDPHandler('localhost', 12201, debugging_fields=False)
Adding Custom Logging Fields
----------------------------
graypy also supports including custom fields in the GELF logs sent to Graylog.
This can be done by using Python's LoggerAdapter_ and Filter_ classes.
Using LoggerAdapter
^^^^^^^^^^^^^^^^^^^
LoggerAdapter_ makes it easy to add static information to your GELF log
messages:
.. code-block:: python
import logging
import graypy
my_logger = logging.getLogger('test_logger')
my_logger.setLevel(logging.DEBUG)
handler = graypy.GELFUDPHandler('localhost', 12201)
my_logger.addHandler(handler)
my_adapter = logging.LoggerAdapter(logging.getLogger('test_logger'),
{'username': 'John'})
my_adapter.debug('Hello Graylog from John.')
Using Filter
^^^^^^^^^^^^
Filter_ gives more flexibility and allows for dynamic information to be
added to your GELF logs:
.. code-block:: python
import logging
import graypy
class UsernameFilter(logging.Filter):
def __init__(self):
# In an actual use case would dynamically get this
# (e.g. from memcache)
self.username = 'John'
def filter(self, record):
record.username = self.username
return True
my_logger = logging.getLogger('test_logger')
my_logger.setLevel(logging.DEBUG)
handler = graypy.GELFUDPHandler('localhost', 12201)
my_logger.addHandler(handler)
my_logger.addFilter(UsernameFilter())
my_logger.debug('Hello Graylog from John.')
Contributors
============
* Sever Banesiu
* Daniel Miller
* Tushar Makkar
* Nathan Klapstein
.. _GELF: https://docs.graylog.org/en/latest/pages/gelf.html
.. _logging.Handler: https://docs.python.org/3/library/logging.html#logging.Handler
.. _GELF UDP Chunking: https://docs.graylog.org/en/latest/pages/gelf.html#chunking
.. _LoggerAdapter: https://docs.python.org/howto/logging-cookbook.html#using-loggeradapters-to-impart-contextual-information
.. _Filter: https://docs.python.org/howto/logging-cookbook.html#using-filters-to-impart-contextual-information
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