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Added note on root logger level #872

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13 changes: 13 additions & 0 deletions contrib/opencensus-ext-azure/README.rst
Original file line number Diff line number Diff line change
Expand Up @@ -37,6 +37,19 @@ This example shows how to send a warning level log to Azure Monitor.
logger.addHandler(AzureLogHandler(connection_string='InstrumentationKey=<your-instrumentation_key-here>'))
logger.warning('Hello, World!')

**IMPORTANT NOTE:**
The root logger for the Python logging library has a logging level set to `WARNING <https://docs.python.org/3/library/logging.html#logging.Logger.setLevel>`_. Any logs that are below this level will not actually be logged, and as such, not sent to Application Insights. More on that `here <https://docs.python.org/3/library/logging.html#logging-levels>`_.
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The root logger for the Python logging library has a logging level set to `WARNING <https://docs.python.org/3/library/logging.html#logging.Logger.setLevel>`_. Any logs that are below this level will not actually be logged, and as such, not sent to Application Insights. More on that `here <https://docs.python.org/3/library/logging.html#logging-levels>`_.
The root logger for the Python logging library has a logging level set to `WARNING <https://docs.python.org/3/library/logging.html#logging.Logger.setLevel>`_ by default. Any logs that are below this level will not actually be logged, and as such, not sent to Application Insights. More on that `here <https://docs.python.org/3/library/logging.html#logging-levels>`_.


To change this behaviour, set the desired level on the logger:

.. code:: python

# Send DEBUG and higher
logger.setLevel(logging.DEBUG)

# DEBUG is level 10, INFO is level 20
logger.info('This now gets sent to Application Insights')

Correlation
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