Check manual page of mqtt_broker

MQTT: Broker miscellaneous information
Distribution official part of Check_MK
License GPLv2
Supported Agents Mqtt
This check measures miscellaneous information of a MQTT broker instance. It displays the total number of subscriptions active on the broker and the socket connection rate.

To make this check work you have to configure the special agent agent_mqtt which connects via MQTT to the broker to gather information from the $SYS/ topic.

This check has been developed with Mosquitto message broker but might also work with other brokers. The available values vary from broker to broker and from version to version.

Please note that this check may only be useful if you connect it directly to a broker. In case you want to monitor a multi-tentant cluster, this check is only useful if configure it for each node since the $SYS/ topic is is node specific. It is not useful to use this check through a load balancer.

The check is always OK.

Item

The instance ID configured in the special agent.