3.5.1 Matrix Server Administration Guide

Advanced Monitor Topics

The topics described here provide technical details about Matrix Server

monitor operations. This information is not required to use Matrix Server

in typical configurations; however, it may be useful if you want to design

custom scripts and monitors, to integrate Matrix Server with custom

applications, or to diagnose complex configuration problems.

Custom Scripts

When you create a custom service or device monitor, you will need to

supply a probe script that can determine whether the service or device is

up or down.

You can also supply Recovery, Start, and Stop scripts for any service or

device monitor. Start and Stop scripts are run during monitor virtual host

transitions. The Recovery script is run only when a probe script fails.

Requirements for Custom Scripts

The following requirements apply to all custom scripts created for use

with service and device monitors.

• The specification of the command and its parameters must be less

than 512 bytes in total length.

• The script must be an executable file in the filesystem. You can use

shell scripts, Java scripts, C programs, or other types of executable

files.

• The command will be executed as root.