Easy SNMP

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Artwork courtesy of Open Clip Art Library <https://openclipart.org/detail/154453/network>_

Introduction

Easy SNMP is a fork of Net-SNMP Python Bindings <http://net-snmp.sourceforge.net/wiki/index.php/Python_Bindings> that attempts to bring a more Pythonic interface to the library. Check out the Net-SNMP website <http://www.net-snmp.org/> for more information about SNMP.

This module provides a full-featured SNMP client API and supports all dialects of the SNMP protocol.

Why Another Library?

• The original Net-SNMP Python library <http://net-snmp.sourceforge.net/wiki/index.php/Python_Bindings>_ is a great starting point but is quite un-Pythonic and lacks proper unit tests and documentation.
• PySNMP <http://pysnmp.sourceforge.net/>_ is entirely written in Python and therefore has a huge performance hit. In some brief tests, I estimate that both the Net-SNMP Python bindings and Easy SNMP are more than 4 times faster than PySNMP. Further to this, PySNMP has an even less Pythonic interface than the official Net-SNMP bindings.
• Many other libraries like Snimpy <https://snimpy.readthedocs.org/en/latest/>_ are sadly based on PySNMP, so they also suffer performance penalty.

Quick Start

There are primarily two ways you can use the Easy SNMP library:

1. By using a Session object which is most suitable when you want to request multiple pieces of SNMP data from a source:

.. code:: python

from easysnmp import Session

# Create an SNMP session to be used for all our requests
session = Session(hostname='localhost', community='public', version=2)

# You may retrieve an individual OID using an SNMP GET
location = session.get('sysLocation.0')

# You may also specify the OID as a tuple (name, index)
# Note: the index is specified as a string as it can be of other types than
# just a regular integer
contact = session.get(('sysContact', '0'))

# And of course, you may use the numeric OID too
description = session.get('.1.3.6.1.2.1.1.1.0')

# Set a variable using an SNMP SET
session.set('sysLocation.0', 'The SNMP Lab')

# Perform an SNMP walk
system_items = session.walk('system')

# Each returned item can be used normally as its related type (str or int)
# but also has several extended attributes with SNMP-specific information
for item in system_items:
    print '{oid}.{oid_index} {snmp_type} = {value}'.format(
        oid=item.oid,
        oid_index=item.oid_index,
        snmp_type=item.snmp_type,
        value=item.value
    )

2. By using Easy SNMP via its simple interface which is intended for one-off operations (where you wish to specify all details in the request):

.. code:: python

from easysnmp import snmp_get, snmp_set, snmp_walk

# Grab a single piece of information using an SNMP GET
snmp_get('sysDescr.0', hostname='localhost', community='public', version=1)

# Perform an SNMP SET to update data
snmp_set(
    'sysLocation.0', 'My Cool Place',
    hostname='localhost', community='public', version=1
)

# Perform an SNMP walk
snmp_walk('system', hostname='localhost', community='public', version=1)

Documentation

Please check out the Easy SNMP documentation at Read the Docs <http://easysnmp.readthedocs.org/>_. This includes installation instructions for various operating systems.

You may generate the documentation as follows:

.. code:: bash

# Install Sphinx
pip install sphinx

# You may optionally export the READTHEDOCS environment variable to build docs
# on systems where you haven't built the C interface
export READTHEDOCS=1

# Build the documentation into static HTML pages
cd docs
make html

Acknowledgments

I'd like to say thanks to the following folks who have made this project possible:

• Giovanni Marzot: the original author
• ScienceLogic, LLC: sponsored the initial development of this module
• Wes Hardaker and the net-snmp-coders: for their hard work and dedication
• fgimian and nnathan: the original contributors to this codebase

Running Tests

Tests use Pytest <https://github.com/pytest-dev/pytest>_. You can run them with the following:

.. code:: bash

git clone https://github.com/easysnmp/easysnmp.git
cd easysnmp
pip install pytest
pytest

License

Easy SNMP is released under the BSD license. Please see the LICENSE <https://github.com/easysnmp/easysnmp/blob/master/LICENSE>_ file for more details.

Copyright

The original version of this library is copyright (c) 2006 G. S. Marzot. All rights reserved.

This program is free software; you can redistribute it and/or modify it under the same terms as Net-SNMP itself.

Copyright (c) 2006 SPARTA, Inc. All Rights Reserved. This program is free software; you can redistribute it and/or modify it under the same terms as Net-SNMP itself.