May 26, 2018
Multi-purpose wrapper plugin for Nagios
check_multi is kind of a wrapper plugin which takes benefit of the Nagios 3.x capability to display multiple lines of plugin output. It calls multiple child plugins and displays their output in the long_plugin_output. A summary is given in the standard plugin output.
Normally the child return code with the highest severity becomes the parent check_multi plugin return code. But you can influence this by specifying flexible state evaluation rules.
The configuration is very simple a NRPE-stylish config file contains a tag for each child plugin and then the check command line.
check_multi can cover complex Business Process Views - using a builtin state evaluation mechanism. The second benefit is cluster monitoring with no need for extra services. All you need is provided by check_multi.