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This Nagios plugin provides precise monitoring by checking the percentage of hosts in a DOWN state within a hostgroup.
Current Version
1.0
Last Release Date
February 17, 2025
Owner
Tsvetomir Tsvetanov
Download URL
https://github.com/ttsvetanov92/Nagios-Core-check_hostgroup
Compatible With
It is especially useful when managing host groups with many devices. For instance, if notifications are temporarily disabled to prevent spam from frequent status changes (e.g., when a client powers down their devices at night), the plugin ensures you still receive alerts in case of a significant issue. In the event of a central failure causing a large number of devices to go offline, it will notify you when the number of offline devices exceeds a specified threshold. Personally, I have configured it to forward critical notifications directly to Telegram.
The plugin is straightforward to integrate into an existing Nagios Core setup.
Please visit the link on GitHub for download and installation instructions.
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