048fd0f6ed
* Default to null for group yaml discovery. * Update test data fora154bdayaml group null fix. * Changes to guessed limit functions for sensors. Original behaviour =================== The file `includes/discovery/functions.inc.php` contains `sensor_limit_low()` and `sensor_limit()` which both attempt to guess a sane value for sensors when no explicitly defined low_limit or high_limit can be found during discovery. Both switch control structures used in those two functions have empty case statements which means that if one of those matches, it's going to fall through and run the code for each subsequent case until a `break` is reached. For example, when we call `function sensor_low_limit(dbm, -13.036)` it will return the value `-12.3842` instead of `null`. That is because there will be a match at `case 'dbm':` which falls through all the way to `case 'cooling':`, where it performs `$limit = -13.036 * 0.95` before hitting a `break`. Changed behaviour =================== Removed `power_consumed` and `count` guessed low_limit and high_limit, I personally added those sensor classes in PR #9471 when I didn't understand that a switch control structure has fall-through behaviour so I can guarantee that guessing limits for those is a mistake on my behalf. It should not be there, only power_factor can have guessed limits. Apologies for the issue, I'm still a beginning programmer! Furthermore, I removed guessed high_limit values for `current` and `power` because these are supposed to draw higher values as more devices or components are installed on for example a PDU or a chassis. Finally, I removed guessed low_limit and high_limit for `dbm` sensors, there is a much too large variance in power budget on commercially available optical transceivers for there to be a sensible window where you can guess these values. * Documentation on adding sensor classes. * Update test data - sensor limit changes @30212d2
Introduction
LibreNMS is an autodiscovering PHP/MySQL/SNMP based network monitoring which includes support for a wide range of network hardware and operating systems including Cisco, Linux, FreeBSD, Juniper, Brocade, Foundry, HP and many more.
We intend LibreNMS to be a viable project and community that:
- encourages contribution,
- focuses on the needs of its users, and
- offers a welcoming, friendly environment for everyone.
The Debian Social Contract will be the basis of our priority system, and mutual respect is the basis of our behaviour towards others. For more about the culture we're trying to build, please read the Freenode philosophy, including guidelines for running an IRC channel and being a community catalyst.
Documentation
Documentation can be found in the doc directory or docs.librenms.org, including instructions for installing and contributing.
Participating
You can participate in the project by:
- Talking to us on Discord or Twitter.
- Joining the LibreNMS Community
- Improving the documentation.
- Cloning the repo and filing pull requests on github.
- Bug Reports on our Community Fourms
- See CONTRIBUTING for more details.
VM image
You can try LibreNMS by downloading a VM image. Currently, a Ubuntu-based image is supplied and has been tested with VirtualBox.
Download one of the VirtualBox images we have available, documentation is provided which details login credentials and setup details.
License
Copyright (C) 2006-2012 Adam Armstrong adama@memetic.org
Copyright (C) 2013-2017 by individual LibreNMS contributors
This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.
LICENSE.txt contains a copy of the full GPLv3 licensing conditions.
The following additional license conditions apply to LibreNMS (a GPL exception):
As a special exception, you have permission to link or otherwise combine LibreNMS with the included copies of the following third-party software, and distribute modified versions, as long as you follow the requirements of the GNU GPL v3 in regard to all of the remaining software (comprising LibreNMS).
Please see Acknowledgements
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