Nagios Support Forum

Unfortunately this plugin is probably not going to work well with MariaDB, unless the status variables returned by MariaDB are exactly the same as the Oracle MySQL version. If you do get it to work, report back and I'll add MariaDB to the list of supported flavors.

That message is pretty clear. Your nagios server can't connect to the database. Check your firewalls. Also you are using a non-standard mysql port, that might be a typo.

Your nagios server needs the PHP PDO package installed. Which package you need depends on the OS, check for the php-mysql package.

The error message makes me think the plugin might not be installed correctly. I haven't tried the plugin with Nagios 4, but it should work. There is a large amount of performance data returned, so you will not be able to use it with NRPE - you need to contact the database directly from your Nagios m...