check_perfdata

Pipe your perfdata and out comes your monitoring plugin status and output. That’s the premise of check_perfdata. Instead of writing a full-fledged Nagios-compatible monitoring plugin and implement (and muck up) your own boundary checking and everything, check_perfdata accepts as its input your Nagios-compatible performance data and will tell you—actually your monitoring system—whether the current value is OK or not.

Here’s a very simple example:

#!/bin/bash

echo "root_space_used=$(df / --output='pcent' | sed '1d;s/^ *//');75;85" | check_perfdata

That’s it! You just wrote a monitoring plugin that will trigger a WARNING if the disk usage passes 75% and a CRITICAL if it passes 85%.

check_perfdata can achieve this because of the information that is present in a simple performance data line. It must be admitted that the format that the Nagios deviced for the performance data in their plugin interface is … Well, let’s say that it’s concise. But, it has sufficient expressivity needed for a lot of use cases.

See the inline help (check_perfdata --help) for more usage instructions.

Contributing

The initial version of check_perfdata is written by Rowan, who is still a newcomer to Rust, and who would love critical comments and pull requests on the code.