Here you can find examples of custom plugin scripts and other bits for Instrumental Daemon.
The following scripts are examples of how to monitor other parts of your system not natively supported by instrumentald.
The log size script simply monitors the size of logs in /var/log, so you can see if a log is failing to rotate or growing out of control. It demonstrates using an executable shell script as a plugin script.
The ISS Monitor script monitors the distance between my current location and the international space station (or, more exactly, a point directly UNDER the international space station). You can use environment variables to track the distance between your location and the ISS.
The MySQL script collects the following metrics:
- Queries -
Queries - Bytes Sent -
Bytes_sent - Bytes Received -
Bytes_received - Connections -
Connections - Slow queries -
Slow_queries
Additionally, it estimates the number received per second ( Queries_per_second, etc. ).
MySQL monitoring functionality is provided by default, but this script demonstrates advanced functionality, including receiving previous script output via STDIN and other advanced features.
You may either edit the values MYSQL_HOST, MYSQL_PORT, MYSQL_USER, MYSQL_DEFAULTS_FILE / MYSQL_PASSWORD in the mysql_status.rb to reflect your server's information or provide them as environment variables to the instrumentald process. It is advisable that you use a MySQL CNF file to specify password information if your server uses password authentication. See the MySQL page regarding password security for more information.