Please see Icinga 2 PR #6042 and #3.
This is the Icinga Template Library (or ITL), a collection of CheckCommand for Icinga 2 to execute Icinga and Nagios
plugins.
Icinga 2 is an open source monitoring system which checks the availability of your network resources, notifies users of outages, and generates performance data for reporting.
Icinga 2 and the ITL documentation are licensed under the terms of the GNU General Public License Version 2, you will find a copy of this license in the COPYING file included in the source package.
Read the INSTALL.md file for more information about how to install the ITL.
The documentation is located in the doc/ directory. The latest documentation is also available on https://docs.icinga.com
Check the project website at https://www.icinga.com for status updates. Join the community channels for questions or ask an Icinga partner for professional support.
There are many ways to contribute to Icinga -- whether it be sending patches, testing, reporting bugs, or reviewing and updating the documentation. Every contribution is appreciated!
Please continue reading in the contributing chapter.