Monitoring Centreon-HA
Monitoring the cluster processes and resources
First, please refer to the Linux SNMP Plugin-Pack documentation page to install all the required components and monitor the basic system health indicators of both of the central nodes.
Then refer to the Centreon-HA Plugin-Pack documentation page to monitor the clustering services and cluster resources on both of the central nodes.
Monitoring the MariaDB Replication
Refer to the MySQL/MariaDB Plugin-Pack documentation page to install all the required components and monitor the standard MariaDB health indicators of both of the central nodes.
The poller's IP address must be a recognized login source for the databases. These GRANT requests must therefore be run on the primary database and they will be immediately replicated to the secondary node (replace the fields between brackets):
CREATE USER '<login>'@'<poller ip address>' IDENTIFIED BY '<password>';
GRANT SELECT on centreon.* TO '<login>'@'<poller ip address>' ;
GRANT SELECT on centreon_storage.* TO '<login>'@'<poller ip address>' ;
GRANT REPLICATION CLIENT on *.* TO '<login>'@'<poller ip address>' ;
After having applied the App-DB-MySQL-custom host template and set the correct values for PORT, USERNAME and PASSWORD macros, make sure that all the default services are checked successfully (no UNKNOWN states).
Then add a new service by browsing to Configuration > Services > Services by host and clicking Add and fill the form according to this table:
| Field | Value |
|---|---|
| Description | MariaDB-Replication |
| Linked with Hosts | Central node |
| Template | App-DB-MySQL-MariaDB-Replication-custom |
PEERHOST | IP address of the other central node |
PEERPORT | Port of the other central node's MariaDB server (default: 3306) |
PEERUSERNAME | Login of the other central node's MariaDB server |
PEERPASSWORD | Password of the other central node's MariaDB server |
Then click Save and export and apply your poller's configuration.
The output of this service should look like:
OK: No problems. Replication is ok.
Connection Status 'mysql:host=<host ip address>;port=3306' [OK]
Connection Status 'mysql:host=<peer node ip address>;port=3306' [OK]
Slave Thread Status [OK]
Position Status [OK]
Monitoring the Quorum Device
First refer to the Linux SNMP Plugin-Pack documentation page to install all the required components and monitor the basic system health indicators of the server supporting the Quorum Device.
Then add a new service by browsing to Configuration > Services > Services by host and clicking Add and fill the form according to this table:
| Field | Value |
|---|---|
| Description | proc-corosync-qnetd |
| Linked with Hosts | Server supporting the Quorum Device |
| Template | App-Monitoring-Centreon-HA-Process-corosync-qnetd-custom |