Configuring the MariaDB Monitor

Configure the mariadbmon module to monitor primary-replica clusters. Learn to set monitoring intervals and define user credentials for health checks.

This document describes how to configure a MariaDB primary-replica cluster monitor to be used with MaxScale.

Configuring the Monitor

Define the monitor that monitors the servers.

[Replication-Monitor]
type=monitor
module=mariadbmon
servers=dbserv1,dbserv2,dbserv3
user=monitor_user
password=my_password
monitor_interval=2000ms

The mandatory parameters are the object type, the monitor module to use, the list of servers to monitor, and the username and password to use when connecting to the servers. The monitor_interval parameter controls how long the monitor waits between each monitor tick.

Monitor User

The monitor user requires the REPLICA MONITOR privilege to do basic monitoring. To create a user with the proper grants, run:

CREATE USER 'monitor_user'@'%' IDENTIFIED BY 'my_password';
GRANT REPLICA MONITOR ON *.* TO 'monitor_user'@'%';

If the automatic failover feature is used, the monitor user needs additional grants. See monitor documentation for more information.

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